Answer:
 

The nerve root of C5 runs between vertebrae C5 and C4.  Nerve function at C5 includes:
 

Motor Function	C5 Deltoid present Pectoralis Absent	C5 Deltoid present Latissimus Absent
movement of the deltoid (abduction of arm - movement of the arm at  shoulder away from midline) weak bicep muscles (able to flex forearm at elbow) lattissmus and pectoralis function is not present at C5
Sensory Function
sensation for C5 includes bicep area (C4 provides sensation to shoulder)

Expected level of Function

• ability to feed self with assisted devices (C5 does not provide any hand movements)
• ability to operate modified wheel chairs for short distances

References:

Barr, M, and Kiernan, J. (1993). The Human Nervous System: An Anatomical Viewpoint. Philadelphia: Lippincott. pp 84-85.

Keppler, J. (1987). Acute spinal cord injury. Critical Care Clinics. July. 3:3. pp. 638-641.

Netter, F. (1989). Atlas of Human Anatomy. New Jersey: Novartis.

Waxman, S. (1996). Correlative Neuroanatomy. 23rd Ed.  Stamford: Lange. pp 46-52, 352-355, 370.
 
 

Brenda Morgan
Clinical Educator, CCTC
May 19, 2000