INTRODUCTION: Carpal tunnel syndrome, entrapment of median nerve at the wrist, 
is one of the most commonly encountered peripheral neuropathies in the upper 
extremity. It is also common in individuals with spinal cord injury due to 
repetitive movements during wheelchair use. Although it is well known that 
prevalence of carpal tunnel syndrome is high in individuals with spinal cord 
injury, no previous study identified aberrant muscle as the cause.
CASE PRESENTATION: A 43-year-old man with T10 incomplete, ASIA Impairment Scale 
(AIS) C, patient with paraplegia who is a wheelchair basketball player presented 
to our electrodiagnostic laboratory with complaints of bilateral hand numbness 
after intensive training for a local veteran wheelchair basketball tournament. 
Nerve conduction studies showed carpal tunnel syndrome. Ultrasonographic 
assessment of carpal tunnel revealed the presence of abnormal muscle in the 
carpal tunnel encroaching the median nerve dynamically.
DISCUSSION: It is important to identify the underlying cause of carpal tunnel 
syndrome, which is a common cause of upper extremity impairment in individuals 
with spinal cord injury because individuals with spinal cord injury who use 
wheelchair depend on their arms for mobility, transfers, and most activities of 
daily life.