In the gray matter, the more distal part of the appendages are represented in more caudal segments. The proximal musculature of the upper extremity is at C5 - C 7 while the distal extremity is at T 1 - C7.

• In the gray matter, the more distal part of the appendages are represented in more caudal segments. The proximal musculature of the upper extremity is at C5 - C 7 while the distal extremity is at T 1 - C7.