Navigation Links
Neural interface for prosthesis can restore function in motor control brain areas
Date:8/20/2012

Amsterdam, NL, August 20, 2012 Amputation disrupts not only the peripheral nervous system but also central structures of the brain. While the brain is able to adapt and compensate for injury in certain conditions, in amputees the traumatic event prevents adaptive cortical changes. A group of scientists reports adaptive plastic changes in an amputee's brain following implantation of multielectrode arrays inside peripheral nerves. Their results are available in the current issue of Restorative Neurology and Neuroscience.

"We found that a neurally-interfaced hand prosthesis re-established communication between the central and peripheral nervous systems, not only restructuring the areas directly responsible for motor control but also their functional balance within the bi-hemispheric system necessary for motor control," says lead investigator Camillo Porcaro, PhD, of the Institute of Neuroscience, Newcastle University, Medical School, Newcastle upon Tyne, UK and the Institute of Cognitive Sciences and Technologies (ISTC) National Research Council (CNR).

A 26-year old male with a left arm amputation was implanted with four microelectrode arrays in the ulnar and median nerves of his stump for four weeks. Prior to implantation, he was trained for two weeks by video to perform three specific movements with his phantom hand. During the experimental period, he underwent intensive training to control a hand prosthesis using the implanted microelectrodes to perform the same hand grip tasks. Together with visual feedback from the prosthesis, the patient received sensory feedback from an experimenter, who delivered electrical pulses to the nerves activated by each movement. EEG signals were recorded as the patient moved his right hand and the prosthesis.

The patient's right hand movement showed clear activation of the primary sensory and motor areas for right hand movement, on the left side of the brain. Prior to implantation, commands to move the phantom left hand triggered the primary sensory and motor areas on the left side of the brain, and the pre-motor and supplementary motor cortices on both sides of the brain. No primary motor cortex movement was found on the right side of the brain, as would be expected.

After the four weeks of prosthesis motor control training with implanted microelectrodes, cerebral activation changed markedly. Cortical recruitment became almost symmetrical with right hand movements. The presence of intra-fascicular electrodes allowed new signals to be delivered through peripheral nerves towards the cortex and produced an intensive exchange of sensori-motor afferent and efferent inputs and outputs. Four weeks of training led to a new functional recruitment of sensorimotor areas devoted to hand control.

"Taken together, the results of this study confirm that neural interfaces are optimal candidates for hand prosthesis control," says Dr. Porcaro. "They establish communication channels needed for natural control of the prosthesis. Furthermore, neural interfaces recreate the connection with the environment that promotes restorative neuroplasticity. Bi-hemispheric networks regain the physiological communication necessary for motor control."


'/>"/>
Contact: Daphne Watrin
d.watrin@iospress.nl
31-206-883-355
IOS Press
Source:Eurekalert

Related medicine news :

1. IBN discovers human neural stem cells with tumor targeting ability
2. Small neural focus groups predict anti-smoking ad success
3. Growing up as a neural stem cell: The importance of clinging together and then letting go
4. Charting autisms neural circuitry
5. Neural precursor cells induce cell death in certain brain tumors
6. Classifying neural circuit dysfunctions using neuroeconomics
7. UC Santa Barbaras Kavli Institute receives 2 grants to explore interface of physics and biology
8. New type of retinal prosthesis could better restore sight to blind, Stanford study says
9. New technique may help severely damaged nerves regrow and restore function
10. Doctors Restore Some Hand Function to Quadriplegic Patient
11. Researchers restore neuron function to brains damaged by Huntingtons disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/8/2016)... ... 08, 2016 , ... According to research by the National ... technicians to be certified or obtain continuing education. To increase patient awareness of ... Your Mouth?” campaign to inform dentists and patients about the possible lack of ...
(Date:2/7/2016)... ... February 07, 2016 , ... HealthSmart Holdings, Inc. announced today ... the tools and information to lower the costs, and increase the impact of ... providing employee healthcare benefits by as much as 22%:, + Price and ...
(Date:2/6/2016)... ... ... US Sports Camps is proud to sponsor the Bay Area Disc Association's ... leaders, ultimate organizations, and coaches from around the US. The theme for this year’s ... of Youth and Education, describes this year YUCC as “an important conversation we must ...
(Date:2/6/2016)... ... February 06, 2016 , ... ... eating disorder treatment helps to reduce the frequency and level of relapse. ... Phase: Re-Establishing Healthy Identity and Purpose,” will explore the critical tasks of the ...
(Date:2/5/2016)... ... 2016 , ... VeloReality President and co-founder Gary ... VR Indoor Trainer with multi-rider capability to an enthusiastic audience at the company's ... the weight of the unit, they also enhance the rider's experience with a ...
Breaking Medicine News(10 mins):
(Date:2/8/2016)... 2016 Vestagen Technical Textiles, Inc., a medical ... healthcare and other demanding applications, today announced it has ... replaces Dale Pfost , PhD, who was serving ... also joining Vestagen,s Board of Directors. ® ... barrier technologies that combines fluid repellent, antimicrobial and breathability ...
(Date:2/8/2016)... Ill. , Feb. 8, 2016  Astellas Pharma Inc. ... announced the promotion of James Robinson as president, ... company,s operations in North and South America ... Astellas Pharma US, representing the commercial organization in ... in 2013. Masao Yoshida , who is ...
(Date:2/8/2016)... , Feb. 8, 2016  CTI BioPharma Corp. ... Company received written communication from the U.S. Food and ... FDA has placed a partial clinical hold on the ... Drug ("IND") application for pacritinib. This clinical hold impacts ... the IND and will also affect planned clinical trials. ...
Breaking Medicine Technology: