Nerves Flashcards
Which spinal cord segments give rise to the superior trunk?
C5, C6
Which spinal cord segment gives rise to the middle trunk?
C7
Which spinal cord segments give rise to the inferior trunk?
C8, T1
Which cord does the median nerve derive from?
Lateral cord and medial cord
Which cord does the ulnar nerve derive from?
Medial cord
Which cord does the radial nerve derive from?
Posterior cord
Which cord does the musculocutaneus nerve derive from?
Lateral cord
Which cord does the medial cutaneous nerve of arm derive from?
Medial cord
Which cord does the medial cutaneous nerve of forearm derive from?
Medial cord
Which cord does the axillary nerve derive from?
Posterior cord
Name the nerves arising from the lateral cord which supply free upper limb.
Musculocutaneous nerve
Median nerve
Name the nerves arising from the medial cord which supply free upper limb.
Median nerve
Ulnar nerve
Medial cutaneous nerve of the arm
Medial cutaneous nerve of the forearm
Name the nerves arising from the posterior cord which supply free upper limb.
Axillary nerve
Radial nerve
What are the terminal branches of the musculocutaneus nerve?
Sensory:
Lateral cutaneous nerve of the forearm
Motor:
Biceps brachii
Coracobrachialis
Brachialis
Which muscle does the musculocutaneus nerve pierce?
Coracobrachialis
Which nerve passes through the carpal tunnel?
Median nerve
What nerve innervates the interossei?
The ulnar nerve
Where is the cutaneous sensory area of the median nerve? How many half digits are supplied on the palmar side of the fingers incl. the thumb?
7 half digits (thumb, 2nd digit, 3rd digit, half of the 4th digit)
How many half digits does the ulnar nerve supply on the palmar side?
3 half digits (5th digit and half of 4th digit)
How many half digits does the ulnar nerve supply on the dorsal side?
3 half digits
How many half digits does the radial nerve supply?
5 half digits
