A patient shows marked weakness in the active movements of abduction and adduction of the fingers and in making a “key pinch.” In addition, the patient shows atrophy of the muscles of the hypothenar...

A patient shows marked weakness in the active movements of

abduction and adduction of the fingers and in making a “key

pinch.” In addition, the patient shows atrophy of the muscles

of the hypothenar eminence and decreased sensation over

the ulnar border of the hand and distal forearm. Based on

information displayed in Appendix II, Parts A through D, which

spinal nerve roots are most likely associated with these

impairments?