The lateral antebrachial cutaneous nerve
(or lateral cutaneous nerve of forearm
) (branch of musculocutaneous nerve
, also sometimes spelled "antebrachial") passes behind the cephalic vein
, and divides, opposite the elbow-joint
, into a volar
and a dorsal
The volar branch (ramus volaris; anterior branch) descends along the radial border of the forearm
to the wrist, and supplies the skin over the lateral half of its volar surface.
At the wrist-joint it is placed in front of the radial artery
, and some filaments, piercing the deep fascia, accompany that vessel to the dorsal surface of the carpus
The nerve then passes downward to the ball of the thumb
, where it ends in cutaneous filaments.
It communicates with the superficial branch of the radial nerve
, and with the palmar cutaneous branch of the median nerve
The dorsal branch (ramus dorsalis; posterior branch) descends, along the dorsal surface of the radial side of the forearm to the wrist
It supplies the skin of the lower two-thirds of the dorso-lateral surface of the forearm, communicating with the superficial branch of the radial nerve and the dorsal antebrachial cutaneous branch
of the radial.
Image:Gray413_color.png|Cross-section through the middle of upper arm.
Image:Gray417_color.PNG|Cross-section through the......