Updated: 4/9/2017

Musculocutaneous Nerve

Topic
Review Topic
0
0
Questions
1
0
0
   
Innervation
  • Motor

    •  coracobrachialis
    •  biceps
    •  medial brachialis
  • Sensory
    • lateral antebrachial cutaneous nerve
      • forearm sensory       
Origin
  • C5,6,7
    • superior trunk
      • lateral cord
        • musculocutaneous nerve
          • branch to coracobrachialis
          • branch to biceps
          • branch to brachialis
            • lateral antebrachial cutaneous nerve (terminal branch)
Course
  • Pierces Coracobrachialis
    • pierces coracobrachialis 3-8 cm distal to coracoid
    • gives branch to coracobrachialis
  • Splits biceps and brachialis
    • runs between biceps and brachialis in the anterior compartment to enter the lateral aspect of the arm
    • gives branch to biceps and brachialis
  • Pierces deep fascia lateral to biceps brachii
    •  a little above the elbow it pierces the deep fascia lateral to the tendon of the biceps brachii
  • Becomes lateral antebrachial cutaneous nerve (terminal branch)
    • emerges lateral to distal bicep tendon and brachoradialis to form  lateral antebrachial cutaneous nerve 
Injury & Clinical Conditions
  • Musculocutaneous Nerve Inury
    • usually iatrogenic during deltopectoral approach with dissection or retraction medial to conjoint tendon

 

 

Please rate topic.

Average 3.0 of 5 Ratings

Thank you for rating! Please vote below and help us build the most advanced adaptive learning platform in medicine

The complexity of this topic is appropriate for?
How important is this topic for board examinations?
How important is this topic for clinical practice?
Questions (1)
Question locked
Sorry, this question is for
PEAK Premium Subscribers only
Upgrade to PEAK
Topic COMMENTS (0)
Private Note