Jiping He - Academia.edu (original) (raw)
Papers by Jiping He
Proceedings. 2005 First International Conference on Neural Interface and Control, 2005., 2005
Abstract In this paper, we review various electrodes with individual design, address the influenc... more Abstract In this paper, we review various electrodes with individual design, address the influences of essential stimulator parameters and internal disturbances on the recruitment characteristics, and describe the control strategies of functional electrical stimulation (FES) ...
Providing a neural prosthesis with sensory feedback is essential for refine manipulation. Here, w... more Providing a neural prosthesis with sensory feedback is essential for refine manipulation. Here, we present a novel approach to provide neural prosthesis with sensory feedback. The prosthesis is constituted by a SCHUNK robot that can grasp different objects and an electrical stimulator that can generate time-variant stimulation patterns to offer sensory feedback to amputees. We convert the output of tactile array sensors on the prosthesis into certain patterns of electrical stimulation of the nerve. Especially, the stimulator is fully implantable, the stimulation parameters and power can percutaneously transfer through an inductively coupled link. The sensory feedback experiment and the simulation pattern generation experiment are conducted separately, indicating that sensory information is available and time-variant stimulation is realizable. In future, based on the novel prosthesis system, we will conduct more experiments by advanced organisms (such as macaque or amputee) to develop Human-machine interfaces.
Proceedings. 2005 First International Conference on Neural Interface and Control, 2005., 2005
Abstract In this paper, cortical control of virtual cursor was investigated by means of support v... more Abstract In this paper, cortical control of virtual cursor was investigated by means of support vector machine (SVM). In SVM, the training inputs of the regression estimation are firing rates of neuronal ensembles in motor and premotor cortex, and the outputs are trajectories ...
Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology, 2002
In this study, we investigate how neurons from different cortices of the brain interact with each... more In this study, we investigate how neurons from different cortices of the brain interact with each other during learning of a task, and how they adapt after perturbation in rhesus monkeys. The level of interaction between neurons over time was estimated through a nonparametric approach by calculating the mutual information between their neural spike trains. It was observed that the
Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ, 1993
Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation
This paper presents a system of foot pressure measuring system based on LabVIEW. The designs of h... more This paper presents a system of foot pressure measuring system based on LabVIEW. The designs of hardware and software system are figured out. LabVIEW is used to design the application interface for displaying plantar pressure. The system can realize the plantar pressure data acquisition, data storage, waveform display, and waveform playback. It was also shown that the testing results of the system were in line with the changing trend of normal gait, which conformed to human system engineering theory. It leads to the demonstration of system reliability. The system gives vivid and visual results, and provides a new method of how to measure foot-pressure and some references for the design of Insole System.
Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology, 2002
ABSTRACT
Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439), 2003
The sensitivity to detect a perturbation at low speed and small magnitude was evaluated to determ... more The sensitivity to detect a perturbation at low speed and small magnitude was evaluated to determine the physiological response differences that arise with age. Seven slow speeds ranging from 1.25 -4.3 cm/s were chosen to evaluate the postural responses (electromyograms) and postural behavior (center of pressure) while subjects stood on a platform that was perturbed anteriorly. This preliminary study indicated that the muscle activation latency is longer in the older population, though both groups show an effect of speed. A significant difference does exist between groups at the intermediate speeds, but center of pressure data showed little differences between groups in regard to the behavior of the body's movements. Future tests will include larger subject groups, neurological deficit groups, and the addition of kinematic data to evaluate joint rotations.
This paper outlines our work in developing telemedicine in portable rehabilitation robot monitor ... more This paper outlines our work in developing telemedicine in portable rehabilitation robot monitor system with 3-D Exercise Machine for Upper Limb, coordination, range of motion and other relevant perceptual motor activities. The preliminary result of this study is the initial evaluation of a device for robotic assisted upper extremity repetitive therapy; the robot has four degrees of freedom at shoulder, elbow and wrist; the robot sensors feedback position and force information for quantitative evaluation of task performance. It has the potential of providing a take-home method of supplementing therapy. The telemedicine system consists of a Web-based library of status tests and Single Board computer Monitor, and can be used with a variety of input devices, including a feedback joystick, infrared emitter sensor Bar to integrated therapy games Stepmania and Wii, assisting or resisting in movement. The system enables real-time, interactive integration of medical data, voice and video tr...
Springer Optimization and Its Applications, 2010
There is clear evidence of fusion processes exhibited by biophysical systems, such as the brain. ... more There is clear evidence of fusion processes exhibited by biophysical systems, such as the brain. One simple example is the way a human brain processes visual information. In fact, one of the consequences of normal integration of the visual information from two retinas in the visual cortex is ability for depth perception. In actuality, a primate brain is capable of integrating visual, auditory, cutaneous, and proprioceptive signals in order to extract crucial information that may not otherwise be fully present in any single type of signal.
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society, Jan 17, 2015
Spinal cord injury (SCI) frequently leads to generalized locomotor disability and gait disturbanc... more Spinal cord injury (SCI) frequently leads to generalized locomotor disability and gait disturbances which cause serious discomfort among patients. Human gait is a complex process in the central nervous system that results from the integration of various mechanisms which remain unclear. Therefore, it is of great theoretical and practical significance to investigate the cortical activity patterns during gait movement in SCI. In this study, brain activity was recorded by electroencephalogram (EEG) during two kinds of gait-like movements. Phase synchronization between motor cortices was investigated through source analysis and phase locking. Results revealed that diverse neural networks with different resonance-like frequencies exist in the brain. Further, we found that the premotor cortex played an important role in the control of passive gait-like movement. In attempted/active movement, spatial function and multimodal integration with somatosensory information are crucial aspects of p...
The interaction between wrist and finger movements during reaching to grasp natural objects. We i... more The interaction between wrist and finger movements during reaching to grasp natural objects. We investigated the spatio-temporal interaction between the Hand, the Wrist and Finger kinematics to discuss basic control mechanism the CNS applies to achieve a smooth transition of the reaching limb. This knowledge is important to understand sensorimotor pathologies, as they occur i.e., in stroke injuries of the brain. We focused on joint synergies and movement invariability. We considered a close temporo-spatial relation between kinematics would represent a frame of reference the CNS chooses to reduce the degree of freedom and to optimize hand motor control.
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1992
The potentid distribution iu volume couductor models of the spinal cord at cervical, midthoracic ... more The potentid distribution iu volume couductor models of the spinal cord at cervical, midthoracic and lowthoracic levels, due to epidural stiolulatiou, was I calculated. Treshold stiiuiili of modeled myelhated dorsal columu and dorsal root fibers were calculated a d were compared with perceptiou thresholds obti~ued froill uie:auremeuts in patients at correspoudiug spiud levels. D. Petit, P.R. Burgess, "Dorsal column projection of receptors of cat hairy skin supplied by cat myelinated fibers", J. Neurophysiol., VO1.31, pp.849-855, 1968. G . Barolat, S. Zame, E. Ketcik, "Multifactorial analysis of epidural spinal cord stimulation", Stereotact. Funct. Neurosurg., vo1.56, pp.77-103, 1991.
Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2003
Computer simulation was performed using finite element analysis (FEA) to analyze stress profile i... more Computer simulation was performed using finite element analysis (FEA) to analyze stress profile in a neural probe made of benzocyclobutene (BCB) polymer with a thin silicon backbone layer. The probe is made up of three distinct sections. Sections 1 and 2 have a silicon backbone layer on the BCB to provide adequate stiffness required for easy handling during surgery (insertion
Applying a dynamic Bayesian network model can help detect neural interactions and analyze the cha... more Applying a dynamic Bayesian network model can help detect neural interactions and analyze the characteristics of a monkey's motor cortex during reachto-grasp tasks.
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2004
A unique structure for chronically implantable cortical electrodes based on benzocyclobutene (BCB... more A unique structure for chronically implantable cortical electrodes based on benzocyclobutene (BCB) biopolymer was designed to perform intracortical and extracortical neural recording simultaneously in basic neuroscience research using animal models. It was fabricated on silicon wafer using standard planar CMOS surface microfabrication technique. Dry-etchable BCB was used to insulate the electrode and provide flexibility for micro-motion compliance between brain tissue and skull. This electrode is also designed to ease the handling and implantation during the surgery and to integrate buffer circuits to improve the signal-to-noise ratio. The reliable fabrication process was developed to improve the electrode yield and performance. A 15 microm thick tungsten layer was sandwiched in the electrode tip to improve the stiffness for easy insertion during the surgery. The fabricated electrodes have two intra-cortical recording sites (20 x 20 microm) in the tip penetrating into the cortex and...
2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, 2008
Abstract An adaptive robot control strategy combining PID-based feedback and Iterative Learning C... more Abstract An adaptive robot control strategy combining PID-based feedback and Iterative Learning Controller (ILC) is proposed for performing passive reaching tasks for RUPERTtrade (Robotic Upper Extremity Repetitive Therapy), a pneumatic muscle driven rehabilitation robotic device. Additionally, a fuzzy rule-base is used to estimate the ILC learning rate to achieve an optimized learning. The preliminary test results from two able-bodied subjects demonstrate that the proposed controller can provide consistent ...
Journal of Nanotechnology in Engineering and Medicine, 2010
2009 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2009
ABSTRACT In this study, the sliding mode approach is applied to the tracking control problem of a... more ABSTRACT In this study, the sliding mode approach is applied to the tracking control problem of a planar arm manipulator system driven by a new type of actuator, which comprises a pneumatic muscle (PM) and a torsion spring. Unlike the traditional agonist/antagonist pneumatic muscle actuator, the PM is arranged in place of bicep and the torsion spring provides opposing torque in the presented actuator. The dynamic model is derived for this system and a sliding mode controller is designed to make the joint angle track a desired trajectory within a guaranteed accuracy even there are modeling uncertainties. A selection method is also proposed to obtain appropriate spring coefficient, which plays an important role in the tracking control task. The effectiveness of the proposed method is confirmed by simulations. The differences between the control results of using our new actuator and that of using the traditional pneumatic muscle actuator in opposing pair configuration are also compared.
Proceedings. 2005 First International Conference on Neural Interface and Control, 2005., 2005
Abstract In this paper, we review various electrodes with individual design, address the influenc... more Abstract In this paper, we review various electrodes with individual design, address the influences of essential stimulator parameters and internal disturbances on the recruitment characteristics, and describe the control strategies of functional electrical stimulation (FES) ...
Providing a neural prosthesis with sensory feedback is essential for refine manipulation. Here, w... more Providing a neural prosthesis with sensory feedback is essential for refine manipulation. Here, we present a novel approach to provide neural prosthesis with sensory feedback. The prosthesis is constituted by a SCHUNK robot that can grasp different objects and an electrical stimulator that can generate time-variant stimulation patterns to offer sensory feedback to amputees. We convert the output of tactile array sensors on the prosthesis into certain patterns of electrical stimulation of the nerve. Especially, the stimulator is fully implantable, the stimulation parameters and power can percutaneously transfer through an inductively coupled link. The sensory feedback experiment and the simulation pattern generation experiment are conducted separately, indicating that sensory information is available and time-variant stimulation is realizable. In future, based on the novel prosthesis system, we will conduct more experiments by advanced organisms (such as macaque or amputee) to develop Human-machine interfaces.
Proceedings. 2005 First International Conference on Neural Interface and Control, 2005., 2005
Abstract In this paper, cortical control of virtual cursor was investigated by means of support v... more Abstract In this paper, cortical control of virtual cursor was investigated by means of support vector machine (SVM). In SVM, the training inputs of the regression estimation are firing rates of neuronal ensembles in motor and premotor cortex, and the outputs are trajectories ...
Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology, 2002
In this study, we investigate how neurons from different cortices of the brain interact with each... more In this study, we investigate how neurons from different cortices of the brain interact with each other during learning of a task, and how they adapt after perturbation in rhesus monkeys. The level of interaction between neurons over time was estimated through a nonparametric approach by calculating the mutual information between their neural spike trains. It was observed that the
Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ, 1993
Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation
This paper presents a system of foot pressure measuring system based on LabVIEW. The designs of h... more This paper presents a system of foot pressure measuring system based on LabVIEW. The designs of hardware and software system are figured out. LabVIEW is used to design the application interface for displaying plantar pressure. The system can realize the plantar pressure data acquisition, data storage, waveform display, and waveform playback. It was also shown that the testing results of the system were in line with the changing trend of normal gait, which conformed to human system engineering theory. It leads to the demonstration of system reliability. The system gives vivid and visual results, and provides a new method of how to measure foot-pressure and some references for the design of Insole System.
Proceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology, 2002
ABSTRACT
Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439), 2003
The sensitivity to detect a perturbation at low speed and small magnitude was evaluated to determ... more The sensitivity to detect a perturbation at low speed and small magnitude was evaluated to determine the physiological response differences that arise with age. Seven slow speeds ranging from 1.25 -4.3 cm/s were chosen to evaluate the postural responses (electromyograms) and postural behavior (center of pressure) while subjects stood on a platform that was perturbed anteriorly. This preliminary study indicated that the muscle activation latency is longer in the older population, though both groups show an effect of speed. A significant difference does exist between groups at the intermediate speeds, but center of pressure data showed little differences between groups in regard to the behavior of the body's movements. Future tests will include larger subject groups, neurological deficit groups, and the addition of kinematic data to evaluate joint rotations.
This paper outlines our work in developing telemedicine in portable rehabilitation robot monitor ... more This paper outlines our work in developing telemedicine in portable rehabilitation robot monitor system with 3-D Exercise Machine for Upper Limb, coordination, range of motion and other relevant perceptual motor activities. The preliminary result of this study is the initial evaluation of a device for robotic assisted upper extremity repetitive therapy; the robot has four degrees of freedom at shoulder, elbow and wrist; the robot sensors feedback position and force information for quantitative evaluation of task performance. It has the potential of providing a take-home method of supplementing therapy. The telemedicine system consists of a Web-based library of status tests and Single Board computer Monitor, and can be used with a variety of input devices, including a feedback joystick, infrared emitter sensor Bar to integrated therapy games Stepmania and Wii, assisting or resisting in movement. The system enables real-time, interactive integration of medical data, voice and video tr...
Springer Optimization and Its Applications, 2010
There is clear evidence of fusion processes exhibited by biophysical systems, such as the brain. ... more There is clear evidence of fusion processes exhibited by biophysical systems, such as the brain. One simple example is the way a human brain processes visual information. In fact, one of the consequences of normal integration of the visual information from two retinas in the visual cortex is ability for depth perception. In actuality, a primate brain is capable of integrating visual, auditory, cutaneous, and proprioceptive signals in order to extract crucial information that may not otherwise be fully present in any single type of signal.
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society, Jan 17, 2015
Spinal cord injury (SCI) frequently leads to generalized locomotor disability and gait disturbanc... more Spinal cord injury (SCI) frequently leads to generalized locomotor disability and gait disturbances which cause serious discomfort among patients. Human gait is a complex process in the central nervous system that results from the integration of various mechanisms which remain unclear. Therefore, it is of great theoretical and practical significance to investigate the cortical activity patterns during gait movement in SCI. In this study, brain activity was recorded by electroencephalogram (EEG) during two kinds of gait-like movements. Phase synchronization between motor cortices was investigated through source analysis and phase locking. Results revealed that diverse neural networks with different resonance-like frequencies exist in the brain. Further, we found that the premotor cortex played an important role in the control of passive gait-like movement. In attempted/active movement, spatial function and multimodal integration with somatosensory information are crucial aspects of p...
The interaction between wrist and finger movements during reaching to grasp natural objects. We i... more The interaction between wrist and finger movements during reaching to grasp natural objects. We investigated the spatio-temporal interaction between the Hand, the Wrist and Finger kinematics to discuss basic control mechanism the CNS applies to achieve a smooth transition of the reaching limb. This knowledge is important to understand sensorimotor pathologies, as they occur i.e., in stroke injuries of the brain. We focused on joint synergies and movement invariability. We considered a close temporo-spatial relation between kinematics would represent a frame of reference the CNS chooses to reduce the degree of freedom and to optimize hand motor control.
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1992
The potentid distribution iu volume couductor models of the spinal cord at cervical, midthoracic ... more The potentid distribution iu volume couductor models of the spinal cord at cervical, midthoracic and lowthoracic levels, due to epidural stiolulatiou, was I calculated. Treshold stiiuiili of modeled myelhated dorsal columu and dorsal root fibers were calculated a d were compared with perceptiou thresholds obti~ued froill uie:auremeuts in patients at correspoudiug spiud levels. D. Petit, P.R. Burgess, "Dorsal column projection of receptors of cat hairy skin supplied by cat myelinated fibers", J. Neurophysiol., VO1.31, pp.849-855, 1968. G . Barolat, S. Zame, E. Ketcik, "Multifactorial analysis of epidural spinal cord stimulation", Stereotact. Funct. Neurosurg., vo1.56, pp.77-103, 1991.
Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2003
Computer simulation was performed using finite element analysis (FEA) to analyze stress profile i... more Computer simulation was performed using finite element analysis (FEA) to analyze stress profile in a neural probe made of benzocyclobutene (BCB) polymer with a thin silicon backbone layer. The probe is made up of three distinct sections. Sections 1 and 2 have a silicon backbone layer on the BCB to provide adequate stiffness required for easy handling during surgery (insertion
Applying a dynamic Bayesian network model can help detect neural interactions and analyze the cha... more Applying a dynamic Bayesian network model can help detect neural interactions and analyze the characteristics of a monkey's motor cortex during reachto-grasp tasks.
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2004
A unique structure for chronically implantable cortical electrodes based on benzocyclobutene (BCB... more A unique structure for chronically implantable cortical electrodes based on benzocyclobutene (BCB) biopolymer was designed to perform intracortical and extracortical neural recording simultaneously in basic neuroscience research using animal models. It was fabricated on silicon wafer using standard planar CMOS surface microfabrication technique. Dry-etchable BCB was used to insulate the electrode and provide flexibility for micro-motion compliance between brain tissue and skull. This electrode is also designed to ease the handling and implantation during the surgery and to integrate buffer circuits to improve the signal-to-noise ratio. The reliable fabrication process was developed to improve the electrode yield and performance. A 15 microm thick tungsten layer was sandwiched in the electrode tip to improve the stiffness for easy insertion during the surgery. The fabricated electrodes have two intra-cortical recording sites (20 x 20 microm) in the tip penetrating into the cortex and...
2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, 2008
Abstract An adaptive robot control strategy combining PID-based feedback and Iterative Learning C... more Abstract An adaptive robot control strategy combining PID-based feedback and Iterative Learning Controller (ILC) is proposed for performing passive reaching tasks for RUPERTtrade (Robotic Upper Extremity Repetitive Therapy), a pneumatic muscle driven rehabilitation robotic device. Additionally, a fuzzy rule-base is used to estimate the ILC learning rate to achieve an optimized learning. The preliminary test results from two able-bodied subjects demonstrate that the proposed controller can provide consistent ...
Journal of Nanotechnology in Engineering and Medicine, 2010
2009 IEEE International Conference on Robotics and Biomimetics (ROBIO), 2009
ABSTRACT In this study, the sliding mode approach is applied to the tracking control problem of a... more ABSTRACT In this study, the sliding mode approach is applied to the tracking control problem of a planar arm manipulator system driven by a new type of actuator, which comprises a pneumatic muscle (PM) and a torsion spring. Unlike the traditional agonist/antagonist pneumatic muscle actuator, the PM is arranged in place of bicep and the torsion spring provides opposing torque in the presented actuator. The dynamic model is derived for this system and a sliding mode controller is designed to make the joint angle track a desired trajectory within a guaranteed accuracy even there are modeling uncertainties. A selection method is also proposed to obtain appropriate spring coefficient, which plays an important role in the tracking control task. The effectiveness of the proposed method is confirmed by simulations. The differences between the control results of using our new actuator and that of using the traditional pneumatic muscle actuator in opposing pair configuration are also compared.