Unit Two Antebrachial Nerves Flashcards
What branches off of the brachial plexus provide sensory innervation to the forearm
Medial antebrachial cutaneous, lateral cutaneous, posterior cutaneous
The medial antebrachial cutaneous nerves is from what cord of brachial plexus
Medial cord
The medial antebrachial fascia pierces what fascia with the basilic vein to run subcutaneously on the medial forearm to wrist
Brachial fascia
The lateral cutaneous nerve is an extension of what branch of brachial plexus
Distal extension of musculocutaneous branch
Lateral cutaneous nerves is where compared to biceps on the brachioradialis
Lateral
Lateral cutaneous runs with what vein
Cephalic
Lateral cutaneous nerve descends on what part of the forearm to wrist
Lateral
Posterior cutaneous nerve is a branch off of what in the brachial plexus
Radial nerve
Posterior cutaneous runs through what to perforate the lateral head of what muscle
Radial canal, tricep
The posterior cutaneous nerve runs where on the forearm and wrist
Lateral side
What are the nerves of the forearm
Musculocutaneous, radial (deep and superficial), median, recurrent motor to thenar, palmar digital, superficial branch of ulnar, median, ulnar and radial nerve
Median nerve comes from what nerve roots
C6, 7, 8, and T1
When the median nerve is in the cubital fossa, where is it compared to brachial artery
Medial
The median nerve exits between what muscles in the cubital fossa
Pronator teres
What are the branches of the median nerve
Anterior interosseous, median and Palmar cutaneous
Anterior interosseous nerve supplies what
Flexor pollicis longus, 1/2 flexor digitorum profundus (digits 2 and 3) and pronator quadratus
The median nerve supplies what in the forearm
Pronator teres, flexor digitorum superficialis, flexor carpi radialis and Palmaris longus
The median nerve innervates what muscles in the forearm
Pronator teres, flexor carpi radialis, palmaris longus and flexor digitorum superficialis
What muscles in the forearm are innervated by the anterior interosseous nerve
Flexor digitorum profundus (digit 2,3), flexor pollicis longus and pronator quadratus
The median nerve innervates what muscles in the hand
Thenar muscles (recurrent branch) and 1 and 2 lumbricals
Ulnar nerve comes from what roots
C8 and T1
What are the branches of the ulnar nerve
Dorsal cutaneous, palmar cutaneous and sometimes had communicating branches between ulnar and median nerves
Ulnar nerve innervates what muscles in the forearm
Flexor carpi ulnaris, flexor digitorum profundus (digit 3 and 4)
Ulnar innervates what muscles in the palm
Hypothenar, adductor pollicis, and flexor pollicis brevis
Ulnar nerve innervates what muscles in the fingers
Palmar interosseous, dorsal interosseous, and 3 and 4 lumbricals
Ulnar nerve innervates what muscles of the digiti minimi
Abductor digiti minimi, opponens digiti minimi, flexor digiti minimi
What are the branches of the radial nerve
Superficial branch (sensory) and deep branch/ posterior interosseous nerve
Roots of radial nerve
C5-T1
Deep branch of the radial nerve pierces what muscle
Supinator
When the deep branch of the radial nerve exits out of supinator at the distal border it becomes what
Posterior interosseous nerve
What muscles have the motor supply of the radial nerve prior to its bifurcation
Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis
The PIN controls what type of movements
Finger extension, and to small degree, wrist extension
Supinator syndrome can have what symptoms
Pain and tenderness in the proximal forearm during activity and finger extension weakness
What symptom is not present in supinator syndrome
Numbness
What is supinator syndrome
Posterior interosseous nerve may be compressed where it passes through the supinator muscle in the proximal forearm
What muscles are innervated by radial nerve in forearm
Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, supinator
What muscles in the forearm are innervated by the posterior interosseous nerve
Extensor carpi ulnaris, extensor digiti minimi, extensor digitorum, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis
