Palmar Cutaneous Branch

The wrist is crossed by the median nerve, the ulnar nerve and the superficial cutaneous branch of the radial nerve. In the wrist area, the ulnar nerve is accompanied by the ulnar artery and the median nerve gives off a sensory branch, the palmar cutaneous branch. 

Proximal to the carpal and Guyon tunnels, the median and ulnar nerves are recognized based on their peculiar fascicular echotexture. Approaching the wrist, the median nerve becomes more superficial and lateral and then runs toward midline and in a deeper position to enter the carpal tunnel (JAMADAR et al. 2001). The palmar cutaneous branch of the median nerve arises from its palmar-radial quadrant approximately 5 cm cranial to the proximal wrist crease (Taleisnik 1973). It remains bound at the main nerve trunk to leave it after approximately... 

Taleisnik J (1973) The palmar cutaneous branch of the medial nerve and the approach to the carpal tunnel an anatomical study. J Bone Joint Surg Am 55 1212-1217 Teefey SA, Middleton WD, Boyer MI (2000) Sonography of the hand and wrist. Semin Ultrasound CT MR 21 192-204 Timins ME (1999) Muscular anatomic variants of the wrist and hand findings on MR imaging. AJR Am J Roentgenol 172 1397-1401... 

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