J Pablo Arias | Universidad Mayor de San Simon (original) (raw)
Papers by J Pablo Arias
Información del libro De pano sedán: obras para gaita.
PLOS ONE, 2016
Pleistocene skinning and exploitation of carnivore furs have been previously inferred from archae... more Pleistocene skinning and exploitation of carnivore furs have been previously inferred from archaeological evidence. Nevertheless, the evidence of skinning and fur processing tends to be weak and the interpretations are not strongly sustained by the archaeological record. In the present paper, we analyze unique evidence of patterned anthropic modification and skeletal representation of fossil remains of cave lion (Panthera spelaea) from the Lower Gallery of La Garma (Cantabria, Spain). This site is one of the few that provides Pleistocene examples of lion exploitation by humans. Our archaeozoological study suggests that lion-specialized pelt exploitation and use might have been related to ritual activities during the Middle Magdalenian period (ca. 14800 cal BC). Moreover, the specimens also represent the southernmost European and the latest evidence of cave lion exploitation in Iberia. Therefore, the study seeks to provide alternative explanations for lion extinction in Eurasia and argues for a role of hunting as a factor to take into account.
PLOS ONE, 2016
The effects produced by transcranial direct current stimulation (tDCS) applied to the motor syste... more The effects produced by transcranial direct current stimulation (tDCS) applied to the motor system have been widely studied in the past, chiefly focused on primary motor cortex (M1) excitability. However, the effects on functional tasks are less well documented. This study aims to evaluate the effect of tDCS-M1 on goal-oriented actions (i.e., arm-reaching movements; ARM), in a reaction-time protocol. 13 healthy subjects executed dominant ARM as fast as possible to one of two targets in front of them while surface EMG was recorded. Participants performed three different sessions. In each session they first executed ARM (Pre), then received tDCS, and finally executed Post, similar to Pre. Subjects received three different types of tDCS, one per session: In one session the anode was on right-M1 (AR), and the cathode on the left-M1 (CL), thus termed AR-CL; AL-CR reversed the montage; and Sham session was applied likewise. Real stimulation was 1mA-10min while subjects at rest. Three different variables and their coefficients of variation (CV) were analyzed: Premotor times (PMT), reaction-times (RT) and movement-times (MT). triceps-PMT were significantly increased at Post-Sham, suggesting fatigue. Results obtained with real tDCS were not different depending on the montage used, in both cases PMT were significantly reduced in all recorded muscles. RT and MT did not change for real or sham stimulation. RT-CV and PMT-CV were reduced after all stimulation protocols. tDCS reduces premotor time and fatigability during the execution of fast motor tasks. Possible underlying mechanisms are discussed.
Journal of Archaeological Science: Reports, 2016
Portable x-ray fluorescence spectrometry (pXRF) has become fundamental in prehistoric research si... more Portable x-ray fluorescence spectrometry (pXRF) has become fundamental in prehistoric research since it enables chemical studies that preserve the integrity of rock art or other investigated archaeological objects. This unique and fragile expression of our ancestors requires the use of non-invasive and non-destructive in situ analytical techniques. This provides significant sources of physicochemical information for enhancing the comprehension of the symbolic and ideological realm of past societies. Thus, XRF data acquired in the field allow giving more detailed insights into the pigment used by Palaeolithic artists, the rock art organisation inside the cave and the different frequentation periods of it. However, if the qualitative study is now well established and routinely used, quantitative evaluation encounters difficulties linked to the context of the study (karstic environment in our case) and the heterogeneous nature of the analysed material (nature of the pigments used, presence of several layers, conservation state of the rock art, type of the rock art support). Moreover, the non-invasive nature of this technique is faced with a large number of data since it offers the acquisition of statistically relevant data by multiple measurements of different spots on the same figure. The present work struggles with the issue of filling the gap of well-adapted quantitative procedures devoted to caves or rock-shelters analyses, and offers efficient tools and methodologies, which take into account the specificities of the studied rock art and its context. Additionally, the evaluation procedures of the high volume of data have to be effective. The analyses of drawings, monochrome and polychrome paintings of three Palaeolithic key cave sites, namely Rouffignac and Font-de-Gaume in Dordogne, Southern-France, and La Garma in Cantabria, Northern Spain, illustrate the new approaches and procedures developed in this study.
![Research paper thumbnail of Evaluation of the effect of training using auditory stimulation on rhythmic movement in Parkinsonian patients—a combined motor and [ 18F]-FDG PET study](https://attachments.academia-assets.com/51679467/thumbnails/1.jpg)
](Parkinsonism Relat Disord, 2006
Introduction: A programme of rehabilitation using auditory cues has previously been shown to decr... more Introduction: A programme of rehabilitation using auditory cues has previously been shown to decrease movement variability in the gait of Parkinsonian patients.Objective and methods: We studied the temporal variability of finger-tapping and gait in 9 patients with Parkinson's disease (PD) before and after they undertook a physical rehabilitation programme. Positron Emission Tomography (PET) using 2-deoxy-2[18F]fluoro-d-glucose (FDG) was performed in these subjects to look for changes in metabolic brain activity after completion of the rehabilitation program.Results: The reduction of variability was seen not only in gait but also other repetitive movements such as finger tapping. Furthermore, here we show differences in resting regional cerebral glucose utilisation in these patients compared to healthy controls (significant hypometabolism—p<0.001—for the PD group in the right parietal and temporal lobes, left temporal and frontal lobes and a hypermetabolism in the left cerebellum) and specific changes following the improvements in repetitive movement abilities (significant metabolic increment—p<0.001—in the PD group in the right cerebellum and in the right parietal and temporal lobes).Conclusions: Although our study does not allow us to draw firm conclusions, it provides new information on the neural basis of auditory stimulation in PD. Our results extend those from previous studies to show improvement in the temporal variability of two types of rhythmic movements after participation by PD patients in a physical rehabilitation programme, along with changes in glucose uptake in several brain areas involved in sensorimotor processing.
Brain Research, Mar 21, 2012
Clinical Neurophysiology, 2011
Thyroid Official Journal of the American Thyroid Association, Dec 1, 2008
... 1 Gabriela Berg,2 Valeria Zago,2 Maria Luz Muzzio,2 Marta Schnitman,1 Isaac Sinay,1 Pablo Ari... more ... 1 Gabriela Berg,2 Valeria Zago,2 Maria Luz Muzzio,2 Marta Schnitman,1 Isaac Sinay,1 Pablo Arias,1 and Laura Schreier2 ... Address reprint requests to: Gabriela Brenta, MD Department of Endocrinology and Metabolism French Hospital of Buenos Aires Virrey del Pino 3370 38A ...
Earth and Planetary Science Letters, Jun 1, 2015
Experimental Brain Research Experimentelle Hirnforschung Experimentation Cerebrale, Jan 23, 2008
Memoires De La Societe Prehistorique Francaise, 2005
The available information about the context of Palaeolithic portable art objects in Cantabrian Sp... more The available information about the context of Palaeolithic portable art objects in Cantabrian Spain is discussed. It is concluded that portable art was frequent at most Palaeolithic sites in the region and that the objects were often integrated within everyday life. In addition, portable art is found in a significant number of Lower and Middle Magdalenian contexts that can be interpreted as ritual areas. A spatial association between the distribution of portable art and parietal art is also seen as being existent. Finally, it is acknowledged that the situation is complex and the meaning of portable art probably varied over time.
Nouvelles De L Archeologie, 2004
Información del libro De pano sedán: obras para gaita.
PLOS ONE, 2016
Pleistocene skinning and exploitation of carnivore furs have been previously inferred from archae... more Pleistocene skinning and exploitation of carnivore furs have been previously inferred from archaeological evidence. Nevertheless, the evidence of skinning and fur processing tends to be weak and the interpretations are not strongly sustained by the archaeological record. In the present paper, we analyze unique evidence of patterned anthropic modification and skeletal representation of fossil remains of cave lion (Panthera spelaea) from the Lower Gallery of La Garma (Cantabria, Spain). This site is one of the few that provides Pleistocene examples of lion exploitation by humans. Our archaeozoological study suggests that lion-specialized pelt exploitation and use might have been related to ritual activities during the Middle Magdalenian period (ca. 14800 cal BC). Moreover, the specimens also represent the southernmost European and the latest evidence of cave lion exploitation in Iberia. Therefore, the study seeks to provide alternative explanations for lion extinction in Eurasia and argues for a role of hunting as a factor to take into account.
PLOS ONE, 2016
The effects produced by transcranial direct current stimulation (tDCS) applied to the motor syste... more The effects produced by transcranial direct current stimulation (tDCS) applied to the motor system have been widely studied in the past, chiefly focused on primary motor cortex (M1) excitability. However, the effects on functional tasks are less well documented. This study aims to evaluate the effect of tDCS-M1 on goal-oriented actions (i.e., arm-reaching movements; ARM), in a reaction-time protocol. 13 healthy subjects executed dominant ARM as fast as possible to one of two targets in front of them while surface EMG was recorded. Participants performed three different sessions. In each session they first executed ARM (Pre), then received tDCS, and finally executed Post, similar to Pre. Subjects received three different types of tDCS, one per session: In one session the anode was on right-M1 (AR), and the cathode on the left-M1 (CL), thus termed AR-CL; AL-CR reversed the montage; and Sham session was applied likewise. Real stimulation was 1mA-10min while subjects at rest. Three different variables and their coefficients of variation (CV) were analyzed: Premotor times (PMT), reaction-times (RT) and movement-times (MT). triceps-PMT were significantly increased at Post-Sham, suggesting fatigue. Results obtained with real tDCS were not different depending on the montage used, in both cases PMT were significantly reduced in all recorded muscles. RT and MT did not change for real or sham stimulation. RT-CV and PMT-CV were reduced after all stimulation protocols. tDCS reduces premotor time and fatigability during the execution of fast motor tasks. Possible underlying mechanisms are discussed.
Journal of Archaeological Science: Reports, 2016
Portable x-ray fluorescence spectrometry (pXRF) has become fundamental in prehistoric research si... more Portable x-ray fluorescence spectrometry (pXRF) has become fundamental in prehistoric research since it enables chemical studies that preserve the integrity of rock art or other investigated archaeological objects. This unique and fragile expression of our ancestors requires the use of non-invasive and non-destructive in situ analytical techniques. This provides significant sources of physicochemical information for enhancing the comprehension of the symbolic and ideological realm of past societies. Thus, XRF data acquired in the field allow giving more detailed insights into the pigment used by Palaeolithic artists, the rock art organisation inside the cave and the different frequentation periods of it. However, if the qualitative study is now well established and routinely used, quantitative evaluation encounters difficulties linked to the context of the study (karstic environment in our case) and the heterogeneous nature of the analysed material (nature of the pigments used, presence of several layers, conservation state of the rock art, type of the rock art support). Moreover, the non-invasive nature of this technique is faced with a large number of data since it offers the acquisition of statistically relevant data by multiple measurements of different spots on the same figure. The present work struggles with the issue of filling the gap of well-adapted quantitative procedures devoted to caves or rock-shelters analyses, and offers efficient tools and methodologies, which take into account the specificities of the studied rock art and its context. Additionally, the evaluation procedures of the high volume of data have to be effective. The analyses of drawings, monochrome and polychrome paintings of three Palaeolithic key cave sites, namely Rouffignac and Font-de-Gaume in Dordogne, Southern-France, and La Garma in Cantabria, Northern Spain, illustrate the new approaches and procedures developed in this study.
Parkinsonism Relat Disord, 2006
Introduction: A programme of rehabilitation using auditory cues has previously been shown to decr... more Introduction: A programme of rehabilitation using auditory cues has previously been shown to decrease movement variability in the gait of Parkinsonian patients.Objective and methods: We studied the temporal variability of finger-tapping and gait in 9 patients with Parkinson's disease (PD) before and after they undertook a physical rehabilitation programme. Positron Emission Tomography (PET) using 2-deoxy-2[18F]fluoro-d-glucose (FDG) was performed in these subjects to look for changes in metabolic brain activity after completion of the rehabilitation program.Results: The reduction of variability was seen not only in gait but also other repetitive movements such as finger tapping. Furthermore, here we show differences in resting regional cerebral glucose utilisation in these patients compared to healthy controls (significant hypometabolism—p<0.001—for the PD group in the right parietal and temporal lobes, left temporal and frontal lobes and a hypermetabolism in the left cerebellum) and specific changes following the improvements in repetitive movement abilities (significant metabolic increment—p<0.001—in the PD group in the right cerebellum and in the right parietal and temporal lobes).Conclusions: Although our study does not allow us to draw firm conclusions, it provides new information on the neural basis of auditory stimulation in PD. Our results extend those from previous studies to show improvement in the temporal variability of two types of rhythmic movements after participation by PD patients in a physical rehabilitation programme, along with changes in glucose uptake in several brain areas involved in sensorimotor processing.
Brain Research, Mar 21, 2012
Clinical Neurophysiology, 2011
Thyroid Official Journal of the American Thyroid Association, Dec 1, 2008
... 1 Gabriela Berg,2 Valeria Zago,2 Maria Luz Muzzio,2 Marta Schnitman,1 Isaac Sinay,1 Pablo Ari... more ... 1 Gabriela Berg,2 Valeria Zago,2 Maria Luz Muzzio,2 Marta Schnitman,1 Isaac Sinay,1 Pablo Arias,1 and Laura Schreier2 ... Address reprint requests to: Gabriela Brenta, MD Department of Endocrinology and Metabolism French Hospital of Buenos Aires Virrey del Pino 3370 38A ...
Earth and Planetary Science Letters, Jun 1, 2015
Experimental Brain Research Experimentelle Hirnforschung Experimentation Cerebrale, Jan 23, 2008
Memoires De La Societe Prehistorique Francaise, 2005
The available information about the context of Palaeolithic portable art objects in Cantabrian Sp... more The available information about the context of Palaeolithic portable art objects in Cantabrian Spain is discussed. It is concluded that portable art was frequent at most Palaeolithic sites in the region and that the objects were often integrated within everyday life. In addition, portable art is found in a significant number of Lower and Middle Magdalenian contexts that can be interpreted as ritual areas. A spatial association between the distribution of portable art and parietal art is also seen as being existent. Finally, it is acknowledged that the situation is complex and the meaning of portable art probably varied over time.
Nouvelles De L Archeologie, 2004
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