O. Macadar - Academia.edu (original) (raw)
Papers by O. Macadar
Journal of Neurobiology, 1984
The electrogenic organ (EO) of Gymnotus carapo has two main portions: a posterior region consisti... more The electrogenic organ (EO) of Gymnotus carapo has two main portions: a posterior region consisting of four bilaterally arranged electrocyte rows; and an anterior portion composed of only two. The lateral row (LR) of the anterior portion contains doubly innervated electrocytes with axon terminals from different nerves on their rostral and caudal faces. The LR is continuous with the most dorsal row of the caudal region. This row also contains doubly innervated electrocytes. The medial row (MR) electrocytes of the anterior region and ventral rows of the caudal region are exclusively caudally innervated. All caudal faces of the anterior or abdominal region are supplied by two nerves which originate from spinal roots VIII to XXI. Roots I to VII give origin to pure rostral nerves whose electromotor axons terminate on the rostral surfaces of the first seven LR electrocytes. A given doubly innervated electrocyte is supplied on its caudal face by a nerve originating several segments (usually seven) posterior to the spinal root supplying its rostral face. Transections of the spinal cord at the level of root VIII isolate the activity of the rostral surfaces of the first electrocytes. The EO discharge (EOD) then appears as a head negative deflection which arises from abdominally located electrocytes. Its monophasic character reveals that the activity remains restricted to the rostral electrocyte surfaces. Damage of the abdominal portion of the EO abolishes the first negative deflection of the normal pulse. Transections of the spinal cord at the level of root XXI isolate the activity of the whole abdominal portion of the EO.(ABSTRACT TRUNCATED AT 250 WORDS)
Artículos desde 2007 hasta 2013. Desde 2020 visítenos en http://revistalatinoamericanadepsicologia.konradlorenz.edu.co/, Nov 25, 2010
We present a description of the electrogenic system and the reproductive behavior of Gymnotiform ... more We present a description of the electrogenic system and the reproductive behavior of Gymnotiform electrical fishes focusing on sexual and seasonal variations of their electric displays, and the communicative value of their social electric signals produced during courtship, using histological techniques and electrophysiological recordings. The pacemaker nucleus organizes the discharge sequence whereas the rest of the system determines the electric organ discharge waveform, which is species specific. During mating, Gymnotiform fishes show electric discharge sexual dimorphism, and generate transient social signals during courtship and gametoposition. Males of Brachyhypopomus pinnicaudatus prolong duration of the late phase of the discharge and generate brief signals characterized by rate increase and amplitude decrease called "Chirps". Females transiently stop their discharge. These courtship transient signals are always produced over a specially large nocturnal rate increase. Chirps and interruptions are repeated in bursts with a temporal association that suggests communication.
ABSTRACT Static and dynamic measurements of the righting reflex were performed in intact toads (B... more ABSTRACT Static and dynamic measurements of the righting reflex were performed in intact toads (Bufo arenarum platensis) and at different stages of recovery from hemilabyrinthectomy. Reflex activity was evaluated by the toad's capacity to maintain a horizontal head position while rolled sideways. Static data were obtained from frontal photographs. In dynamic experiments platform position (stimulus) was measured through a potentiometer, while a linear accelerometer glued to the cranium was used to record head tilts. The dynamic study included a linear systems analysis using sinusoids of 0.5-3 Hz with rolls of up to 30° to each side. Hemilabyrinthectomy produced a head tilt towards the lesioned side, and gain decay and phase lag increase in the dynamic response. All postural defects recovered progressively within 30-60 days as already described in other species. Nevertheless, the tonic head deviation produced by dynamic stimuli of frequencies above 1 Hz did not recover. This remnant defect has not been observed in previous studies in which only static observations were performed. The involvement of a frequency-dependent rectifying mechanism in postural compensation is discussed.
Neuroscience, 2002
The subthalamic nucleus participates in the control of movement and is considered a surgical targ... more The subthalamic nucleus participates in the control of movement and is considered a surgical target in the treatment of parkinsonian symptoms. Using the rat brain in vitro slice technique we show that sustained high-frequency (>100 Hz) electrical stimulation (i.e., ‘tetanic stimulation’) of the nucleus, as used in humans to treat Parkinson’s disease, silenced subthalamic neurons. Two main cell types were
Journal of Experimental Biology, 2004
- electrophysiological sexual dimorphism: males present a lengthened negative phase in their ele... more 2) electrophysiological sexual dimorphism: males present a lengthened negative phase in their electric organ discharge (EOD) and (3) decreased temperature sensitivity of the EOD: the waveform does not change when temperature increases above 20°C. Acclimation to sustained high temperature (30 days, 28°C, 12·h:12·h L:D, low conductivity) induced gonad maturation along with EOD dimorphism. Our data show that high environmental temperature is enough to trigger sexual maturity in Brachyhypopomus pinnicaudatus from a temperate climate.
Journal of Comparative Physiology A, 2011
A central pacemaker that underlies the production of seasonal and sexually dimorphic social signa... more A central pacemaker that underlies the production of seasonal and sexually dimorphic social signals: functional aspects revealed by glutamate stimulation Your article is protected by copyright and all rights are held exclusively by Springer-Verlag. This e-offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your work, please use the accepted author's version for posting to your own website or your institution's repository. You may further deposit the accepted author's version on a funder's repository at a funder's request, provided it is not made publicly available until 12 months after publication.
Neuroscience, 2002
The subthalamic nucleus participates in the control of movement and is considered a surgical targ... more The subthalamic nucleus participates in the control of movement and is considered a surgical target in the treatment of parkinsonian symptoms. Using the rat brain in vitro slice technique we show that sustained high-frequency (>100 Hz) electrical stimulation (i.e., 'tetanic stimulation') of the nucleus, as used in humans to treat Parkinson's disease, silenced subthalamic neurons. Two main cell types were identified. 'Tonic cells' (68%) showed delayed inward rectification, fired continuously, switched to bursting and stopped firing when strongly depolarized with injected current. Tetanic stimulation of the nucleus induced a steady depolarization (approximately 18 mV) that triggered action potentials at a high rate followed by bursts and finally (approximately 25 s) totally silenced tonic cells. The control tonic activity was recovered rapidly (<10 s) after ending stimulation. 'Phasic cells' (25%) discharged a single initial brief burst of action pote...
The Journal of Laryngology & Otology, 1983
Journal of Comparative Physiology A, 1994
Rhamphichthys rostratus (L.) emits brief pulses (2 ms) repeated very regularly at 50 Hz. The elec... more Rhamphichthys rostratus (L.) emits brief pulses (2 ms) repeated very regularly at 50 Hz. The electric organ shows a heterogeneous distribution of the electrocyte tubes and the occurrence of three electrocyte types (caudally innervated, rostrally innervated and marginallycaudally innervated). In the sub-opercular region the electric organ consists of a pair of tubes containing only caudally innervated electrocytes. At the abdominal region the EO consists of three pairs of tubes. Each pair contains one of the described electrocyte types. The number of electrocyte tubes increases toward the tail to reach nine or ten pairs in the most caudal segments. In the intermediate region most tubes contain doubly innervated electrocytes except the ventral pair that contains caudally innervated electrocytes. The caudal 25% contains exclusively caudally innervated electrocytes. The electric organ discharge consists of five wave components (V1 to V5). Electrophysiological data are consistent with the hypothesis that V1 results from the activity of the rostral faces of rostrally innervated electrocytes. V2 results from the activities of rostral faces of marginally-caudally innervated electrocytes while V3 results from the activities of caudal faces of most electrocytes. Curarization experiments demonstrated that V4 and V5 result from action potential invasion and are not directly elicited by neural activity.
Journal of Comparative Physiology A, 1988
Clinical Neurophysiology, 1999
Neuronal synchronization is a basic feature in the generation of epileptiform discharges. Spontan... more Neuronal synchronization is a basic feature in the generation of epileptiform discharges. Spontaneous large sharp waves (LSWs) can be recorded in the turtle brain in vitro, indicating the synchronous activation of large neuronal populations. The aim of this study was to analyze the spatial and temporal distribution of LSWs within the brain; the participation of glutamate in LSWs generation was also investigated. Extracellular field potentials were recorded in vivo (n = 4) and in vitro (n = 36). LSWs were recorded from cerebral cortex, optic tectum, and thalamus. LSWs were recorded from cerebral cortex, optic tectum and thalamus. No LSWs were observed in cerebellum and brain stem. In some experiments, LSWs could be recorded only from medial cortex. Latency studies demonstrated that, within each hemisphere, medial cortex led the generation of LSWs; in addition, isolated medial cortex could sustain LSWs. Intracortical laminar field potentials in medial cortex indicated that LSWs generate mainly in the molecular layer, probably at pyramidal cell dendrites. Pharmacological experiments demonstrated that NMDA and non-NMDA glutamate receptors are involved in LWSs generation. These results suggest that turtle medial cortex is the pacemaker area for LSWs generation and it can be a useful model to study cellular and circuital mechanisms of neuronal synchronization.
Electroencephalography and Clinical Neurophysiology
Revue d'oto-neuro-ophtalmologie
Comparative Biochemistry and Physiology Part A: Physiology, 1997
Jamming avoidance response (JAR) and aggressive behavior were evaluated in pairs of weakly electr... more Jamming avoidance response (JAR) and aggressive behavior were evaluated in pairs of weakly electric fish Gymnotw carupo. JAR consists of brief frequency increases of the electric organ discharge (EOD) of the faster fish of the pair when a coincidence between the EODs is close to occur. Aggressive behavior is known to be very strong and robust in this species. 3,+Methylenedioxymethamphetamine (MDMA) treatment significantly decreased the intensity of aggressive behavior while it increases the intensity and probability of occurrence of JAR. After MDMA treatment, the aggressive behavior was replaced by a distinct nonaggressive ("friendly") type of interaction. In addition to JAR, other behaviors, such as novelty response to visual stimuli, were enhanced with MDMA treatment, suggesting that the effects of this drug on aggressive behavior were not due to a general depression of all behavioral displays. Comparative aspects of the described behavioral changes with the effects of MDMA in humans are discussed. . territorial behavior becomes more important when more than three individuals cohabit in the same aquarium.
Restorative neurology and neuroscience, 1992
Vestibular habituation was studied in normal subjects and in patients with cerebellar disease usi... more Vestibular habituation was studied in normal subjects and in patients with cerebellar disease using a stimulation paradigm proposed in this paper. Six caloric stimuli were repeated daily in the same ear during six days and electronystagmographic responses at the beginning and the end of that period were compared. The normal behaviour was a clear reduction of the response across time. Two groups of cerebellar patients were identified by their ability to recover from positional imbalance after treatment. Compensated patients responded to repeated caloric stimulation in the same way as normal subjects. Conversely, uncompensated patients increased their response after the stimulation paradigm. The role played by the cerebellum in vestibular plasticity is discussed together with the observed correlation between vestibular habituation and the ability for postural recovery to occur.
Journal of neurophysiology, 1979
1. We classified the utricular afferents on the basis of their spontaneous acitivity and response... more 1. We classified the utricular afferents on the basis of their spontaneous acitivity and responses to tilts and vibrations. 2. Type I afferents fire spontaneously in a regular pattern; their responses to tilts consist of a phasic-tonic change in firing rate. They may respond to vibrations by increasing or decreasing their rate and show no adaptation. 3. The spontaneous activity and the responses to tilts of type II are similar to those observed in type I afferents. The differences become apparent when the preparation is subjected to a vibrational stimulus, since type II neurons increase their firing rate regardless of the stimulus frequency and show adaptation. 4. Type III neurons have no spontaneous activity. They respond to tilts by firing during the transition from one position to the other. They respond to a vibrational stimulus with maintained firing and show no adaptation. 5. We studied the dynamic responses of each type of neuron. We used sensitivity curves for the study of t...
Physiology & Behavior, 1971
ABSTRACT
Physica A: Statistical Mechanics and its Applications, 1998
We undertake the study of EEG-signals by recourse to a wavelet based multiresolution analysis as ... more We undertake the study of EEG-signals by recourse to a wavelet based multiresolution analysis as adapted to an information-measure-scenario. Di erent information measures are employed. It is shown that non-extensive ones seem to be of particular usefulness.
Physica A: Statistical Mechanics and its Applications, 1999
We undertake the study of human EEG-signals by recourse to a wavelet based multiresolution analys... more We undertake the study of human EEG-signals by recourse to a wavelet based multiresolution analysis as adapted to an Information-Measure-Scenario. Di erent information measures are employed. It is shown that non-extensive ones seem to be of particular usefulness. Their use opens up perspectives of building up automatic detection devices. Conjectures concerning general characteristics of focal epilepsy are formulated on the basis of a Tsallis-type of analysis.
Journal of Neurobiology, 1984
The electrogenic organ (EO) of Gymnotus carapo has two main portions: a posterior region consisti... more The electrogenic organ (EO) of Gymnotus carapo has two main portions: a posterior region consisting of four bilaterally arranged electrocyte rows; and an anterior portion composed of only two. The lateral row (LR) of the anterior portion contains doubly innervated electrocytes with axon terminals from different nerves on their rostral and caudal faces. The LR is continuous with the most dorsal row of the caudal region. This row also contains doubly innervated electrocytes. The medial row (MR) electrocytes of the anterior region and ventral rows of the caudal region are exclusively caudally innervated. All caudal faces of the anterior or abdominal region are supplied by two nerves which originate from spinal roots VIII to XXI. Roots I to VII give origin to pure rostral nerves whose electromotor axons terminate on the rostral surfaces of the first seven LR electrocytes. A given doubly innervated electrocyte is supplied on its caudal face by a nerve originating several segments (usually seven) posterior to the spinal root supplying its rostral face. Transections of the spinal cord at the level of root VIII isolate the activity of the rostral surfaces of the first electrocytes. The EO discharge (EOD) then appears as a head negative deflection which arises from abdominally located electrocytes. Its monophasic character reveals that the activity remains restricted to the rostral electrocyte surfaces. Damage of the abdominal portion of the EO abolishes the first negative deflection of the normal pulse. Transections of the spinal cord at the level of root XXI isolate the activity of the whole abdominal portion of the EO.(ABSTRACT TRUNCATED AT 250 WORDS)
Artículos desde 2007 hasta 2013. Desde 2020 visítenos en http://revistalatinoamericanadepsicologia.konradlorenz.edu.co/, Nov 25, 2010
We present a description of the electrogenic system and the reproductive behavior of Gymnotiform ... more We present a description of the electrogenic system and the reproductive behavior of Gymnotiform electrical fishes focusing on sexual and seasonal variations of their electric displays, and the communicative value of their social electric signals produced during courtship, using histological techniques and electrophysiological recordings. The pacemaker nucleus organizes the discharge sequence whereas the rest of the system determines the electric organ discharge waveform, which is species specific. During mating, Gymnotiform fishes show electric discharge sexual dimorphism, and generate transient social signals during courtship and gametoposition. Males of Brachyhypopomus pinnicaudatus prolong duration of the late phase of the discharge and generate brief signals characterized by rate increase and amplitude decrease called "Chirps". Females transiently stop their discharge. These courtship transient signals are always produced over a specially large nocturnal rate increase. Chirps and interruptions are repeated in bursts with a temporal association that suggests communication.
ABSTRACT Static and dynamic measurements of the righting reflex were performed in intact toads (B... more ABSTRACT Static and dynamic measurements of the righting reflex were performed in intact toads (Bufo arenarum platensis) and at different stages of recovery from hemilabyrinthectomy. Reflex activity was evaluated by the toad's capacity to maintain a horizontal head position while rolled sideways. Static data were obtained from frontal photographs. In dynamic experiments platform position (stimulus) was measured through a potentiometer, while a linear accelerometer glued to the cranium was used to record head tilts. The dynamic study included a linear systems analysis using sinusoids of 0.5-3 Hz with rolls of up to 30° to each side. Hemilabyrinthectomy produced a head tilt towards the lesioned side, and gain decay and phase lag increase in the dynamic response. All postural defects recovered progressively within 30-60 days as already described in other species. Nevertheless, the tonic head deviation produced by dynamic stimuli of frequencies above 1 Hz did not recover. This remnant defect has not been observed in previous studies in which only static observations were performed. The involvement of a frequency-dependent rectifying mechanism in postural compensation is discussed.
Neuroscience, 2002
The subthalamic nucleus participates in the control of movement and is considered a surgical targ... more The subthalamic nucleus participates in the control of movement and is considered a surgical target in the treatment of parkinsonian symptoms. Using the rat brain in vitro slice technique we show that sustained high-frequency (>100 Hz) electrical stimulation (i.e., ‘tetanic stimulation’) of the nucleus, as used in humans to treat Parkinson’s disease, silenced subthalamic neurons. Two main cell types were
Journal of Experimental Biology, 2004
- electrophysiological sexual dimorphism: males present a lengthened negative phase in their ele... more 2) electrophysiological sexual dimorphism: males present a lengthened negative phase in their electric organ discharge (EOD) and (3) decreased temperature sensitivity of the EOD: the waveform does not change when temperature increases above 20°C. Acclimation to sustained high temperature (30 days, 28°C, 12·h:12·h L:D, low conductivity) induced gonad maturation along with EOD dimorphism. Our data show that high environmental temperature is enough to trigger sexual maturity in Brachyhypopomus pinnicaudatus from a temperate climate.
Journal of Comparative Physiology A, 2011
A central pacemaker that underlies the production of seasonal and sexually dimorphic social signa... more A central pacemaker that underlies the production of seasonal and sexually dimorphic social signals: functional aspects revealed by glutamate stimulation Your article is protected by copyright and all rights are held exclusively by Springer-Verlag. This e-offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your work, please use the accepted author's version for posting to your own website or your institution's repository. You may further deposit the accepted author's version on a funder's repository at a funder's request, provided it is not made publicly available until 12 months after publication.
Neuroscience, 2002
The subthalamic nucleus participates in the control of movement and is considered a surgical targ... more The subthalamic nucleus participates in the control of movement and is considered a surgical target in the treatment of parkinsonian symptoms. Using the rat brain in vitro slice technique we show that sustained high-frequency (>100 Hz) electrical stimulation (i.e., 'tetanic stimulation') of the nucleus, as used in humans to treat Parkinson's disease, silenced subthalamic neurons. Two main cell types were identified. 'Tonic cells' (68%) showed delayed inward rectification, fired continuously, switched to bursting and stopped firing when strongly depolarized with injected current. Tetanic stimulation of the nucleus induced a steady depolarization (approximately 18 mV) that triggered action potentials at a high rate followed by bursts and finally (approximately 25 s) totally silenced tonic cells. The control tonic activity was recovered rapidly (<10 s) after ending stimulation. 'Phasic cells' (25%) discharged a single initial brief burst of action pote...
The Journal of Laryngology & Otology, 1983
Journal of Comparative Physiology A, 1994
Rhamphichthys rostratus (L.) emits brief pulses (2 ms) repeated very regularly at 50 Hz. The elec... more Rhamphichthys rostratus (L.) emits brief pulses (2 ms) repeated very regularly at 50 Hz. The electric organ shows a heterogeneous distribution of the electrocyte tubes and the occurrence of three electrocyte types (caudally innervated, rostrally innervated and marginallycaudally innervated). In the sub-opercular region the electric organ consists of a pair of tubes containing only caudally innervated electrocytes. At the abdominal region the EO consists of three pairs of tubes. Each pair contains one of the described electrocyte types. The number of electrocyte tubes increases toward the tail to reach nine or ten pairs in the most caudal segments. In the intermediate region most tubes contain doubly innervated electrocytes except the ventral pair that contains caudally innervated electrocytes. The caudal 25% contains exclusively caudally innervated electrocytes. The electric organ discharge consists of five wave components (V1 to V5). Electrophysiological data are consistent with the hypothesis that V1 results from the activity of the rostral faces of rostrally innervated electrocytes. V2 results from the activities of rostral faces of marginally-caudally innervated electrocytes while V3 results from the activities of caudal faces of most electrocytes. Curarization experiments demonstrated that V4 and V5 result from action potential invasion and are not directly elicited by neural activity.
Journal of Comparative Physiology A, 1988
Clinical Neurophysiology, 1999
Neuronal synchronization is a basic feature in the generation of epileptiform discharges. Spontan... more Neuronal synchronization is a basic feature in the generation of epileptiform discharges. Spontaneous large sharp waves (LSWs) can be recorded in the turtle brain in vitro, indicating the synchronous activation of large neuronal populations. The aim of this study was to analyze the spatial and temporal distribution of LSWs within the brain; the participation of glutamate in LSWs generation was also investigated. Extracellular field potentials were recorded in vivo (n = 4) and in vitro (n = 36). LSWs were recorded from cerebral cortex, optic tectum, and thalamus. LSWs were recorded from cerebral cortex, optic tectum and thalamus. No LSWs were observed in cerebellum and brain stem. In some experiments, LSWs could be recorded only from medial cortex. Latency studies demonstrated that, within each hemisphere, medial cortex led the generation of LSWs; in addition, isolated medial cortex could sustain LSWs. Intracortical laminar field potentials in medial cortex indicated that LSWs generate mainly in the molecular layer, probably at pyramidal cell dendrites. Pharmacological experiments demonstrated that NMDA and non-NMDA glutamate receptors are involved in LWSs generation. These results suggest that turtle medial cortex is the pacemaker area for LSWs generation and it can be a useful model to study cellular and circuital mechanisms of neuronal synchronization.
Electroencephalography and Clinical Neurophysiology
Revue d'oto-neuro-ophtalmologie
Comparative Biochemistry and Physiology Part A: Physiology, 1997
Jamming avoidance response (JAR) and aggressive behavior were evaluated in pairs of weakly electr... more Jamming avoidance response (JAR) and aggressive behavior were evaluated in pairs of weakly electric fish Gymnotw carupo. JAR consists of brief frequency increases of the electric organ discharge (EOD) of the faster fish of the pair when a coincidence between the EODs is close to occur. Aggressive behavior is known to be very strong and robust in this species. 3,+Methylenedioxymethamphetamine (MDMA) treatment significantly decreased the intensity of aggressive behavior while it increases the intensity and probability of occurrence of JAR. After MDMA treatment, the aggressive behavior was replaced by a distinct nonaggressive ("friendly") type of interaction. In addition to JAR, other behaviors, such as novelty response to visual stimuli, were enhanced with MDMA treatment, suggesting that the effects of this drug on aggressive behavior were not due to a general depression of all behavioral displays. Comparative aspects of the described behavioral changes with the effects of MDMA in humans are discussed. . territorial behavior becomes more important when more than three individuals cohabit in the same aquarium.
Restorative neurology and neuroscience, 1992
Vestibular habituation was studied in normal subjects and in patients with cerebellar disease usi... more Vestibular habituation was studied in normal subjects and in patients with cerebellar disease using a stimulation paradigm proposed in this paper. Six caloric stimuli were repeated daily in the same ear during six days and electronystagmographic responses at the beginning and the end of that period were compared. The normal behaviour was a clear reduction of the response across time. Two groups of cerebellar patients were identified by their ability to recover from positional imbalance after treatment. Compensated patients responded to repeated caloric stimulation in the same way as normal subjects. Conversely, uncompensated patients increased their response after the stimulation paradigm. The role played by the cerebellum in vestibular plasticity is discussed together with the observed correlation between vestibular habituation and the ability for postural recovery to occur.
Journal of neurophysiology, 1979
1. We classified the utricular afferents on the basis of their spontaneous acitivity and response... more 1. We classified the utricular afferents on the basis of their spontaneous acitivity and responses to tilts and vibrations. 2. Type I afferents fire spontaneously in a regular pattern; their responses to tilts consist of a phasic-tonic change in firing rate. They may respond to vibrations by increasing or decreasing their rate and show no adaptation. 3. The spontaneous activity and the responses to tilts of type II are similar to those observed in type I afferents. The differences become apparent when the preparation is subjected to a vibrational stimulus, since type II neurons increase their firing rate regardless of the stimulus frequency and show adaptation. 4. Type III neurons have no spontaneous activity. They respond to tilts by firing during the transition from one position to the other. They respond to a vibrational stimulus with maintained firing and show no adaptation. 5. We studied the dynamic responses of each type of neuron. We used sensitivity curves for the study of t...
Physiology & Behavior, 1971
ABSTRACT
Physica A: Statistical Mechanics and its Applications, 1998
We undertake the study of EEG-signals by recourse to a wavelet based multiresolution analysis as ... more We undertake the study of EEG-signals by recourse to a wavelet based multiresolution analysis as adapted to an information-measure-scenario. Di erent information measures are employed. It is shown that non-extensive ones seem to be of particular usefulness.
Physica A: Statistical Mechanics and its Applications, 1999
We undertake the study of human EEG-signals by recourse to a wavelet based multiresolution analys... more We undertake the study of human EEG-signals by recourse to a wavelet based multiresolution analysis as adapted to an Information-Measure-Scenario. Di erent information measures are employed. It is shown that non-extensive ones seem to be of particular usefulness. Their use opens up perspectives of building up automatic detection devices. Conjectures concerning general characteristics of focal epilepsy are formulated on the basis of a Tsallis-type of analysis.