Testing Muscles (arm)

Question 1

how can you test the function of the biceps brachii and its innervation

Answer 1

biceps depp tendon reflex
nerve supply= musculocutaneous nerve C5 and C6

placing the thumb on the biceps tendon (within cubital fossa)and then striking thumb with a tendon hammer, will cause contraction and stretch at the elbow

Question 2

what is the innervation of the forearm muscles

Answer 2

all median nerve except flexor carpi ulnaris (digits 4 and 5) and the median part of flexor digitorum profundus which are supplied by the ulnar nerve

Question 3

what muscle flexes, abducts and adducts the wrist

Answer 3

carpi muscles

Question 4

what muscles flex the thumb

Answer 4

muscles named pollicis

Question 5

what is the action of the pronator teres

Answer 5

pronates the forearm

Question 6

what are the actions of the flexor carpi ulnaris muscle

Answer 6

flexes and adduct the hand

Question 7

what is the action of the palmaris longus

Answer 7

flexes the wrist

Question 8

what are the actions of flexor carpi radialis

Answer 8

flexes and abducts the hand

Question 9

what are the actions of flexor carpi ulnaris

Answer 9

flexion and adduction of wrist

Question 10

what are the actions of flexor digitorum superficialis

Answer 10

flexes digits 2-5 at the middle interphalanges joints

Question 11

what are the actions of flexor digitorum profundus

Answer 11

flexes digits 2-5 at distal interphalanges joint

Question 12

what are the actions of flexor pollicis longus

Answer 12

flexes the thumb at the distal phalanx

Question 13

what is the action of the pronator quadratus

Answer 13

pronation of forearm, flexes elbow

Question 14

what is the action of the brachioradialis

Answer 14

flexion of the semi-pronated forearm

Question 15

what innervates the brachioradialis

Answer 15

radial nerve

Question 16

what is the action of the triceps brachii

Answer 16

weak extension of the arm at the shoulder joint and extension of the forearm of the elbow joint

Question 17

what are the actions of the muscles in the superficial later of the posterior forearm

Answer 17

attach to the common extensor tendon, extend the fingers and wrist

Question 18

what is the actions of the extensor carpi radialis longus and brevis

Answer 18

extends and abducts the wrists

Question 19

what is the action of the extensor digitorum

Answer 19

extends medial four fingers at the MCP and IP joints

Question 20

what is the action of the extensor digiti minimi

Answer 20

extends the little finger, contributes to extension at the wrist

Question 21

what is the action of the extensor carpi ulnaris

Answer 21

extension and adduction of wrist

Question 22

what is the action of the anconeus

Answer 22

extends and stabilises the elbow joint

abducts the ulna during pronation of the forearm

Question 23

what is the action of the supinator

Answer 23

supinates the forearm

Question 24

what are the actions of the abductor pollicis longus

Answer 24

abducts the thumb

Question 25

what is the action of the extensor pollicis brevis

Answer 25

extends at the MCP and carpometacarpal joints of the thumb

Question 26

what is the action of the extensor pollicis longus

Answer 26

extends all joints of the thumb

Question 27

what is the action of the extensor indicis proprius

Answer 27

extends the index finger

Question 28

what is the nerve supply to the posterior forearm

Answer 28

radial nerve