Lecture 17 Flashcards
What nerve roots is a post fixed brachial plexus composed of ?
C6, 7, 8, T1, 2
What nerve roots is the brachial plexus composed of?
C5, 6, 7, 8, T1
Which nerve innervates the serratus anterior and contributes to winging of the scapula?
Long thoracic nerve (C5, 6, 7)
Which nerves are of the anterior division of the brachial plexus?
Musculocutaneous
Median
Ulnar
What are the three anterior divisions of the brachial plexus?
Superior
Middle
Inferior
What muscles does the musculocutaneous nerve innervate?
Brachialis
Biceps brachii
Brachioradialis
What are the nerve roots of the musculocutaneous nerve?
C5, 6
What is the cutaneous innervation of the musculocutaneous nerve?
Lateral aspect of the the forearm
What nerve roots is a pre fixed brachial plexus composed of?
C4, 5, 6, 7, 8
What nerve does the musculocutaneous nerve give rise to?
The lateral cutaneous nerve of the forearm.
Motor supply ends at the elbow.
What muscle does the musculocutaneous nerve pierce?
The coracobrachialis
What happens if the musculocutaneous nerve is injured?
Can’t flex elbow
Lose sensation on lateral side of forearm
What muscles does the median nerve innervate?
All of the flexor muscles of the anterior compartment of the forearm (except what the ulnar nerve supplies), the thenar muscles and the lateral two lumbricals.
What are the nerve roots of the median nerve?
C5, 6, 7, 8, T1
What is the cutaneous innervation of the median nerve?
Lateral 3 1/2 digits on the palmar side.
Lateral 3 1/2 nail beds on the dorsal side (variable).