Nerves

Question 1

What is a Martin-Gruber anastomoses?

Answer 1

A communicating branch between the ulnar and median/AIN nerve in the forearm. The result of which is that the ulnar innervated muscles distal are actually innervated by the median nerve or AIN.

Question 2

What is a Riches-Cannieu anamostosis?

Answer 2

Communication between the deep branch of the ulnar nerve and the recurrent median thenar branch and results in ulnar innervation of the thenar muscles.

Question 3

What is the Mainacci anastomosis

Answer 3

A communication between between the median and ulnar nerve in the forearm which is the opposite to Martin-Gruber.

Question 4

What is a Berretini anastomosis?

Answer 4

Communication between the ulnar 4th common digital nerve and the median third common digital nerve.

Question 5

What are the proximal compression sites of the median nerve?

Answer 5

Ligament of struthers
Bicepital aponeurosis (lacterus fibrosis)
Between deep and superficial heads of pronated teres