Ulnar Nerve

• Ulnar Nerve:

  • Arises from the ventral rami of C8 and T1 (and occasionally C7), the inferior trunk (anterior division) and the medial cord
  • Runs medial to axillary artery and descends down medial to brachial artery and anterior to triceps
  • Half way down the arm the ulnar nerve pierces the intermuscular septum to enter posterior compartment of arm
  • It lies on the medial head of triceps down and runs down to the medial epicondyle of the humerus and lies in the ulnar groove behind the medial epicondyle (funny bone), before entering the forearm

  A) ulnar nerve

  
• Ulnar Nerve:

  1. Arises from the ventral rami of C8 and T1 (and occasionally C7), the inferior trunk (anterior division) and the medial cord
  2. Runs medial to axillary artery and descends down medial to brachial artery and anterior to triceps
  3. Half way down the arm the ulnar nerve pierces the intermuscular septum to enter posterior compartment of arm
  4. It lies on the medial head of triceps down and runs down to the medial epicondyle of the humerus and lies in the ulnar groove behind the medial epicondyle (funny bone), before entering the forearm

  A) ulnar nerve