Anterior Arm, Anterior Forearm and Cubital Fossa Flashcards
what separates the posterior and anterior muscle compartments in the arm?
humerus and medial and lateral intermuscular septae
name the muscles of the anterior arm
biceps brachii (2 heads)
coracobrachialis
brachialis
what nerve supplies the muscles in the anterior arm?
musculocutaneous
what movement do all the anterior arm muscles do?
flex forearm
describe the position of corcaobrachialis
deep to biceps brachii and lateral to brachialis
what does the brachial artery divide into and where?
into radial and ulnar arteries
in cubital fossa, opposite neck of radius under the bicipital aponeurosis
what does the musculocutaneous nerve emerge into lateral of the biceps?
lateral cutaneous nerve of forearm
describe the course of the median nerve?
runs distally in arm on lateral side of brachial artery until it reaches the middle of the arm and contacts brachialis
then descends in cubital fossa where it lies deep to biceps aponeurosis and median cubital vein
funny bone
ulnar nerve
what causes cubital tunnel syndrome?
when the ulnar nerve gets trapped at cubital tunnel
what is the cubital fossa?
triangular space between skin and anterior aspect of capsule of elbow joint
superior boundary of cubital fossa?
transverse line between epicondyles of humerus
medial boundary of cubital fossa?
pronator teres
lateral border of cubital fossa?
brachioradialis
superficial components of cubital fossa?
medial cubital vein
cephalic vein
basilic vein
deep contents of cubital fossa?
median nerve (medially) brachial artery radial nerve (laterally)
what nerve supplies the muscles in the anterior forearm?
median nerve
except for flexor carpi ulnaris and medial part of flexor digitorum profundus which are both ulnar nerve
name the muscles in the superficial layer of the anterior forearm?
pronator teres
palmaris longus
flexor carpi radialis
flexor carpi ulnaris
name the muscles in the intermediate layer of the anterior forearm?
flexor digitorum superficialis (has 4 muscle bellies/tendons fore the 4 medial digits)
name the muscles in the deep layer of the anterior forearm
flexor digitorum profundus
flexor pollicus longus
pronator quadratus
what is the common proximal attachment for the muscles in the superficial layer of the anterior forearm?
medial epicondyle of humerus by a common flexor tendon
what is the common proximal attachment for the muscles in the intermediate layer of the anterior forearm?
distal humerus, coronoid process of ulna and radial head
what is the common distal attachment for the muscles in the deep layer of the anterior forearm?
the muscles in the intermediate layer
general actions of muscles in anterior forearm?
flexion, abduction, adduction of carpus
flexion of finger
flexion of thumb
pronation of forearm and prox and dist radioulnar joints
what does the palmar carpal ligament and flexor retinaculum at the wrist do?
hold the long tendons of muscles in place at the wrist joint
what nerve supplies the skin of the central palm?
palmar cutaneous branch of median nerve
what nerve is trapped in carpal tunnel syndrome?
median nerve
what 2 cutaneous branches does the ulnar nerve give rise to?
palmar cutaneous branch
dorsal cutaneous branch
what nerve supplies skin of dorsum medial to axis of 4th digit?
dorsal cutaneous branch of ulnar nerve
medial epicondylitis?
golfers elbow
lateral epicondylitis?
tennis elbow
what side of the arm is the cephalic vein on?
lateral
what side of the arm is the basilic vein on?
medial
what does the median cubital vein join?
the cephalic and basilic vein
