Nerves of the Upper Limb Flashcards
(52 cards)
Which divisions make the lateral cord?
Ant div. of the sup and middle trunk
Where is the median nerve susceptable to damage?
In the carpal tunnel
What is the cutaneous innervation of the median nerve?
Lateral 3 and a half fingers and corresponding palmar skin
Lateral 3 and half finger’s nail beds (at least) on the dorsal side
Where does the axillary nerve emerge from posteriorly?
Above the teres minor
What is the course of the musculocutaneous nerve?
Pierces the coracobrachialis
Runs in the flexor compartment of arm (in between biceps and brachialis)
Pass ant of elbow and runs in the latero-superficial
What is innervated by the musculocutaneous nerve?
Flexor muscles of the arm
Lateral skin of the forearm
Which muscles does the ulnar nerve supply?
Forearm: FCU and medial aspect of FDP
Hand: All the muscles of the hand except those supplied by the median nerve
What is the cutaneous innervation of the ulnar nerve?
Median 1 and a half fingers and their corresponding palm and dorsum
Where does the radial nerve run in the arm?
Emerges from under teres minor
Runs medial to lateral
Tucks under cover of brachioradialis
What supplies the lateral aspect of the skin of the upper limb?
Axillary > Radial > Musculocutaneous (ARM)
Where do nerves of the limb bud branch from the distribution of spinal nerves?
Lat. cutaneous branch
What is the course of the median nerve in the forearm?
Under the fibrous arch of the FDS
Runs down in between FDS and FDP
Through the carpal tunnel
Will a fracture of the humerus effect the triceps muscle?
No, because it is innervated by the radial nerve right after it emerges from the teres minor
What is the cutaneous innervation of the radial nerve?
Poster aspect of the upper limb including the dorsal aspect of the lateral 3.5 fingers (except their nail beds)
What are the roots of the musculocutaneous nerve?
C5,6 and 7
How are the cords named?
By their relation with the axillary a.
Which divisions make the medial cord?
Ant division of the inferior trunk
Which muscles of the hand does the median nerve supply?
Thenar and lateral 2 lumbricals
Which muscles do the median and ulnar nerves supply?
Flexors of the forearm and hand
What are the rami supply of the skin of the upper limb?
C4 - T1
What nerves originate from the posterior cord?
Axillary and radial
What are the rami of the axillary nerve?
C5 and 6
Where are the divisions of the BP located?
Under the clavicle
What nerves originate from the lateral cord?
Musculocutaneous and half the median nerve
