Location

The C7 nerve root can be evaluated by testing sensation on the volar aspect of the middle finger.

Significance

Loss of sensation should be correlated to the motor exam; in this case wrist flexion.
http://www.orthopaedia.com/display/Main/C-7+Motor–Flexor+Carpi+Radialis

Sensory loss involving a more diffuse area, overlapping several dermatomes suggests a peripheral nerve injury.

The most sensitive way of assessing sensory loss is using two-point discrimination.

Figures

Attachments:


c7.JPG (image/jpeg)