Cubital Fossa, Anterior Forearm, and Wrist

Question 1

name the muscles included in the first layer of the flexor muscles in the forearm

Answer 1

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris

Question 2

name the muscle in the second layer of the flexor muscles in the forearm

Answer 2

flexor digitorum superficialis

Question 3

name the muscles in the third layer of the flexor muscles in the forearm

Answer 3

flexor digitorum profundus

flexor pollicis longus

Question 4

name the muscle in the fourth layer of the flexor muscles in the forearm

Answer 4

pronator quadratus

Question 5

pronator teres

Answer 5

origin = from medial epicondyle of the humerus and from the head of the ulna 
insertion = mid shaft of the radius
innervation = median nerve
action = pronation of the forearm, rotates the radius on the ulna and helps flex forearm at elbow

Question 6

flexor carpi radialis

Answer 6

goes through the slit in the flexor retinaculum

origin = medial epicondyle of the humerus 
insertion = 2nd and 3rd metacarpal
innervation = median nerve
action = flexes wrist on the radial side

Question 7

palmaris longus

Answer 7

origin = medial epicondyle of humerus 
insert = into the flexor retinaculum and the palmar aponeurosis
-does not go thorugh the carpal tunnel
innervation = median nerve
action = flexes at the wrist

Question 8

flexor carpi ulnaris

Answer 8

origin = medial epicondyle of the humerus and also  a second origin at the head of the ulna
insertion = pisiform bone of the wrist
innervation = ulnar nerve
action = flexes wrist on the ulnar side

Question 9

flexor digitorum superficialis

Answer 9

origin = medial epicondyle of humerus and the mid third of the radius
insertion = middle phalanges of the four fingers (stacked tendons as they go through the carpal tunnel)
innervation = median nerve
action = flexes the digits

Question 10

flexor digitorum profundus

Answer 10

origin = medial epicondyle of humerus and from the posterior and medial surface of the ulna
insertion = distal phalanges of the digits
-flat as the four tendons enter the carpal tunnel
innervation = ring, little fingers innervated by ulnar nerve; middle, index by anterior interosseous branch of median nerve
action = flexes the digits

Question 11

flexor pollicis longus

Answer 11

origin = medial epicondyle of humerus and from the anterior surfce of radius and interosseous membrane
insertion - distal phalax of thumb
innervation = anterior interosseous branch of median nerve

Question 12

pronator quadratus

Answer 12

origin = ulna
insertion = radius
innervation = anterior interosseous branch of median nerve
action = pronates the hand

Question 13

origin = from medial epicondyle of the humerus and from the head of the ulna 
insertion = mid shaft of the radius
innervation = median nerve
action = pronation of the forearm, rotates the radius on the ulna and helps flex forearm at elbow

Answer 13

pronator teres

Question 14

origin = ulna
insertion = radius
innervation = anterior interosseous branch of median nerve
action = pronates the hand

Answer 14

pronator quadratus

Question 15

origin = medial epicondyle of humerus and from the anterior surface of radius and interosseous membrane
insertion - distal phalax of thumb
innervation = anterior interosseous branch of median nerve

Answer 15

flexor pollicis longus

Question 16

goes through the slit in the flexor retinaculum

origin = medial epicondyle of the humerus 
insertion = 2nd and 3rd metacarpal
innervation = median nerve
action = flexes wrist on the radial side

Answer 16

flexor carpi radialis

Question 17

origin = medial epicondyle of humerus and from the posterior and medial surface of the ulna
insertion = distal phalanges of the digits
-flat as the four tendons enter the carpal tunnel
innervation = ring, little fingers innervated by ulnar nerve; middle, index by anterior interosseous branch of median nerve
action = flexes the digits

Answer 17

flexor digitorum profundus

Question 18

origin = medial epicondyle of humerus and the mid third of the radius
insertion = middle phalanges of the four fingers (stacked tendons as they go through the carpal tunnel)
innervation = median nerve
action = flexes the digits

Answer 18

flexor digitorum superficialis

Question 19

origin = medial epicondyle of the humerus and also  a second origin at the head of the ulna
insertion = pisiform bone of the wrist
innervation = ulnar nerve
action = flexes wrist on the ulnar side

Answer 19

flexor carpi ulnaris

Question 20

origin = medial epicondyle of humerus 
insert = into the flexor retinaculum and the palmar aponeurosis
-does not go thorugh the carpal tunnel
innervation = median nerve
action = flexes at the wrist

Answer 20

palmaris longus