Forearm, Wrist, Hand muscles, action, nerve supply and root

Question 1

Supination of forearm

Answer 1

mm- supinator (post inter C5, C6), biceps brachii (musculo C5, C6)

Question 2

Pronation of forearm

Answer 2

mm- pronator quadratus (ant inter C8, T1), pronator teres (median C6, C7), flexor carpi radialis (median C6, C7)

Question 3

Extension of wrist

Answer 3

mm- ECRL (radial C6, C7), ECRB (post inter C7, C8), ECU (post inter C7, C8)

Question 4

Flexion of wrist

Answer 4

mm-FCR (median C6, C7), FCU (Ulnar C7, C8)

Question 5

Ulnar deviation of wrist

Answer 5

mm- FCU (ulnar C7, C8), ECU (post inter C7, C8)

Question 6

Radial deviation of the wrist

Answer 6

mm- FCR (median C6, C7), ECRL (radial C6, C7)

Question 7

Extension of fingers

Answer 7

mm- Extensor digitorum (post inter C7, C8), Extensor indices–second finger (post inter C7, C8), Extensor digiti minimi–little finger (post inter C7, C8)

Question 8

Flexion of fingers

Answer 8

mm-flexor digitorum profundus (ant inter C8, T1 lateral two digits, ulnar C8, T1 medial two digits), flexor digitorum superficials (median C7, C8, T1), Lumbricals (first and second-median C8, T1/ third and fourth-ulnar deep terminal branch C8, T1), interossei (ulnar deep terminal branch C8, T1), flexor digiti minimi (ulnar deep terminal branch C8, T1)

Question 9

Abduction of the fingers (with finger extended)

Answer 9

mm- dorsal interossei (ulnar deep terminal branch C8, T1), abductor digiti minimi–little finger (ulnar deep terminal branch C8, T1)

Question 10

Adduction of fingers (with fingers extended)

Answer 10

mm- palmar interossei (ulnar deep terminal branch C8, T1)

Question 11

Extension of thumb

Answer 11

mm- extensor pollicis longus (post inter C7, C8), extensor pollicis brevis (post inter C7, C8)

Question 12

Flexion of thumb

Answer 12

mm- flexor pollicis brevis (median lateral terminal branch and ulnar C8, T1), flexor pollicis longus (ant inter C8, T1), opponens pollicis (median lateral terminal branch C8, T1)

Question 13

Abduction of thumb

Answer 13

mm-abductor pollici longus (post inter C7, C8), abductor pollicis brevis (median lateral terminal branch C8, T1)

Question 14

Adduction of thumb

Answer 14

mm- adductor pollicis (ulnar deep terminal branch C8, T1)