Lab 8, Entire Muscle

Question 1

Pronator Teres

Answer 1

Origin- humeral head=medial epicondyle of humerus, ulnar head=coronoid process of ulna
Insertion- middle of lateral radius
Action- forearm pronation, elbow flexion
Nerve Supply- median nerve
Blood Supply- ulnar artery

Question 2

Flexor Carpi Ulnaris

Answer 2

Origin- humeral head=medial epicondyle of humerus, ulnar head=medial olecranon process and proximal posterior ulna
Insertion- pisiform, hook of hamate, base of 5th metacarpal
Action- wrist flexion, ulnar deviation of wrist
Nerve Supply- ulnar nerve
Blood Supply- ulnar artery

Question 3

Palmaris Longus

Answer 3

Origin- medial epicondyle of humerus
Insertion-palmar aponeurosis, flexor retinaculum, bases of proximal phalanges
Action- wrist flexion
Nerve Supply- median nerve
Blood Supply- ulnar artery

Question 4

Flexor Carpi Radialis

Answer 4

Origin- medial epicondyle of humerus
Insertion- bases of 2nd and 3rd metacarpals
Action- wrist flexion, radial deviation of wrist
Nerve Supply- median nerve
Blood Supply- ulnar artery

Question 5

Flexor Digitorum Superficialis

Answer 5

Origin- medial epicondyle of humerus, coronoid process of ulna, anterior oblique line of radius
Insertion- slips onto both sides of bases of middle phalanges of digits 2-5
Action- flexion of digits 2-5 at MCP joints, flexion of digits 2-5 at PIP joints, wrist flexion
Nerve Supply- median nerve
Blood Supply- ulnar artery

Question 6

Pronator Quadratus

Answer 6

Origin- distal 1/4 of anteromedial ulna
Insertion- distal 1/4 of anterolateral radius
Action- forearm pronation
Nerve Supply- median nerve
Blood Supply- anterior interosseous artery

Question 7

Flexor Pollicis Longus

Answer 7

Origin- middle of anterior surface of radius, interosseous membrane
Insertion- palmar surface of base of distal phalanx of thumb
Action- thumb flexion at IP joint
Nerve Supply- median nerve
Blood Supply- anterior interosseous artery

Question 8

Flexor Digitorum Profundus

Answer 8

Origin- proximal 3/4 of anterior ulna and adjacent interosseous membrane
Insertion- bases of distal phalanges of digits 2-5
Action- flexion of digits 2-5 at DIP joints, flexion of digits 2-5 at PIP joints, flexion of digits 2-5 at MCP joints, wrist flexion
Nerve Supply- digits 2-3=median nerve, digits 4-5=ulnar nerve
Blood Supply- anterior interosseous artery