Somatotopy of the motor cortex after long-term spinal cord injury or amputation

Certain brain-computer interface (BCI) methods use intrinsic signals from the motor cortex to control neuroprosthetic devices. The organization of the motor pathways in those populations likely to use neuroprosthetic devices, therefore, needs to be determined; there is evidence that following diseas...

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Bibliographic Details
Published in:IEEE transactions on neural systems and rehabilitation engineering 2001-06, Vol.9 (2), p.154-160
Main Authors: Turner, J.A., Lee, J.S., Martinez, O., Medlin, A.L., Schandler, S.L., Cohen, M.J.
Format: Article
Language:English
Subjects:
Adult
Amputation
Artificial Limbs
Brain computer interfaces
Deafness
Diseases
Electrodes
Female
Human computer interaction
Humans
Implants (surgical)
Laboratories
Leg - physiology
Leg - surgery
Magnetic Resonance Imaging
Male
Microelectrodes
Middle Aged
Motor Cortex - pathology
Motor Cortex - physiology
Movement
Neural prosthesis
Neuroimaging
Paper technology
Perception
Quadriplegia - physiopathology
Spinal Cord Injuries - physiopathology
Spinal cord injury
User interfaces
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Summary:Certain brain-computer interface (BCI) methods use intrinsic signals from the motor cortex to control neuroprosthetic devices. The organization of the motor pathways in those populations likely to use neuroprosthetic devices, therefore, needs to be determined; there is evidence that following disease or injury the representation of the body in the motor cortex may change. In this study, functional MRI measures of somatotopy following spinal cord injury (SCI) showed evidence of changes in limb representations in the motor cortex. Subjects with chronic SCI had unusual cortical patterns of activity when attempting to move limbs below their injury; amputees showed a more normal somatotopy. The functional reorganization may affect optimal implanted electrode placements for invasive BCI methods for these different populations.
ISSN:1534-4320
1558-0210
DOI:10.1109/7333.928575