Which capability distinguishes a C6 spinal cord injury from a C5 injury?

The capability that distinguishes a C6 spinal cord injury from a C5 injury is the ability to extend wrists. At the C5 level, an individual typically retains some function in the shoulder area and can flex the elbows, but they do not have the capability to extend the wrists.

With a C6 injury, the spinal cord damage is lower in the cervical spine, which allows for greater functionality in the upper extremities. Specifically, it includes the ability to use the wrist extensors, which enable wrist extension and provide additional functional benefits, such as the ability to grasp and release objects.

Understanding the distinction between C5 and C6 injuries is crucial for rehabilitation and determining appropriate assistive devices and therapy goals, as individuals with a C6 injury can often perform tasks that require wrist control, whereas those with a C5 injury may not have this ability.