UNIT 1: flexor muscles of arm/forearm

Question 1

What are the three flexor muscles of the arm?

Answer 1

• biceps brachii
• brachialis
• coracobrachialis

Question 2

how is the biceps brachii organised and where does it insert?

Answer 2

• long head - arises from supraglenoid tubercle
• short head - arises from coracoid process

inserts on radial tuberosity into bicipital aponeurosis

Question 3

what movements does the biceps brachii produce?

Answer 3

• flexor of elbow joint when forearm supinated

- supinates forearm when in pronation

Question 4

BRACHIALIS:

1) Where is it found?
2) where does it insert?
3) what movement does it produce?

Answer 4

1) posterior to biceps
2) ulnar tuberosity
3) flexes elbow joint in all positions

Question 5

CORACOBRACHIALIS:

1) Where does it insert?
2) what movement does it produce?

Answer 5

1) humerus

2) flexion/ adduction of shoulder joint

Question 6

BRACHORADIALIS:

1) Where does it insert?
2) what movement does it produce?

Answer 6

1) distal radius

2) flexor of elbow

Question 7

how are flexor muscles of the forearm arranged?

Answer 7

three layers: superficial/ intermediate/ deep

Question 8

which muscles form the superficial layer?

Answer 8

• palmaris longus
• pronator teres
• flexor carpi radialis
• flexor carpi ulnaris

Question 9

What movements do the muscles of the superficial produce?

Answer 9

PL: flexes hand at wrist/ flexes palmar aponeurosis
PT: pronates/ flexes forearm
FCR: flexes/ abducts the hand
FCU: flexes/ adducts the hand

Question 10

what muscle is in the intermediate layer and what movements does it produce?

Answer 10

flexor digitorum superficialis: flexes wrist joint/ proximal phalanges at metacarpophalangeal joints and proximal interphalangeal joint of middle 4 joints

Question 11

what muscles form the deep layer?

Answer 11

• flexor digitorum profundus
• flexor pollicis longus
• pronator quadratus

Question 12

what movements do the muscles of the deep layer produce?

Answer 12

FDP: flexes wrist joint/ distal interphalangeal joints
FPL: flexes wrist/ metacarpohalangeal & interphalangeal joints
PQ: pronates forearm and helps interosseous membrane bind radius to ulna

Question 13

What are the borders of the cubital fossa?

Answer 13

superior: line between epicondyle
medial: lateral border of pronator teres
lateral: medial border of brachioradialis

Question 14

What are the contents of the cubital fossa?

mnemonic

Answer 14

(Really need beer to be at my nicest)

• radial nerve
• biceps tendon
• brachial artery
• median nerve