Flexors and Pronators of the antebrachium and manus

Question 1

Flexor Carpi radialis m.

Answer 1

origin: medial epicondyle of the humerus and medial border of the radius
insertion: palmar side of the base of MC 2 & 3
innervation: median nerve
action: flexion of the carpus

Question 2

Superficial digital flexor m.

Answer 2

origin: medial epicondyle of the humerus
insertion: palmar surface of the proximal end of middle phalanges of digits 2-5
innervation: median n.
action: flexion of the carpus, flexion of the metacarpophalangeal and proximal interphalangeal joints of digits 2-5

Question 3

Flexor Carpi ulnaris m.

Answer 3

origin:
ulnar head - caudal border and medial surface of the olecranon (lateral surface of the olecranon in a cat)
humeral head - medial epicondyle of the humerus

insertion: accessory carpal bone

Innervation: ulnar n.

action: flexion of the carpus

Question 4

deep digital flexor m.

Answer 4

origin:

humeral head (2)- medial epicondyle of the humerus

ulnar head (1) - proximal three-fourths of the caudal border of the ulna

radial head (3)- middle third of the medial border of the radius

insertion: palmar surface of distal phalanx of digits 1-5

Innervation: median and ulnar nerve

action: flexion of the carpus, flexion of metacarpophalangeal and proximal and distal interphalangeal joints of digits 1-5

Question 5

interossei mm.

Answer 5

FOUR MUSCLES

origin: base of metacarpals 2-5 and carpal joint capsule
insertion: base of proximal phalanges, proximal palmar sesamoid bones, common digital extensor tendon via the extensor
innervation: ulnar n.
action: flexion of metacarpophalangeal joints 2-5, stabilization of metacarpophalangeal joints 2-5 during weight bearing

Question 6

pronator teres m.

Answer 6

origin: medial epicondyle of the humerus
insertion: medial border of the radius between the proximal and middle thirds
innervation: median n.
action: pronation of the antebrachium, flexion of the elbow

Question 7

pronator quadratus m.

Answer 7

attachment, apposed surfaces of radius and ulna

innervation: median n.
action: pronation of the antebrachium