Upper Limb Muscles

Question 1

Anterior Upper Limb Muscle:
Upper Arm/Shoulder to Elbow
Name
Action
Nerve Supply

Answer 1

Biceps Brachii

Flex arm/forearm
Medial rotate forearm

Musculocutaneous Nerve

Question 2

Posterior Upper Limb Muscle:
Upper Arm/Shoulder to Elbow
Name
Action
Nerve Supply

Answer 2

Triceps

extend shoulder and forearm

Radial Nerve

Question 3

Anterior Forearm Muscles:
5 Superficial
Names and Nerve Supply

Answer 3

Palmaris Longus
Pronator Teres
Flexor Carpi Radialis
Flexor Carpi Ulnaris
Flexor Digitorum Superficialis

All supplied by median nerve
except FCU= ulnar nerve

Question 4

UNLIKELY TO BE IN EXAM
Anterior Forearm Muscles:
3 Deep
Names, Action and Nerve Supply

Answer 4

Flexor Digitorum Profundus:
flex elbow/wrist/distal finger joints

Flexor Pollicis (thumb) Longus:
flex thumb

Flexor Quadratus:
pronation of forearm

All supplied by median nerve

Question 5

Upper Limb: Pronation

Answer 5

arm facing down

Question 6

Upper Limb Adduction and Abduction

Answer 6

Add= toward midline
Abd= away from midline

Question 7

Upper Limb
Anterior: Flexion
Posterior: Extension

Answer 7

Anterior Muscles:
Flexion=decreases angle, brings parts closer together

Posteror Muscles:
Extension= increases angle, moves parts further away

Question 8

Upper Limb: Deviation
eg. radial and ulnar

Answer 8

Out of usual alignment.

eg.
radial deviation moves hand toward thumb side
ulnar deviation moves hand toward pinky side

Question 9

Anterior Forearm Superficial:
Palmaris Longus

Action
Nerve Supply

Answer 9

Weak flexion of forearm + wrist

Median Nerve

Question 10

Anterior Forearm Superficial:
Pronator Teres

Action
Nerve Supply

Answer 10

Flexion of elbow
Pronation of forearm

Median Nerve

Question 11

Anterior Forearm Superficial:
Flexor Carpi (wrist) Radialis

Action
Nerve Supply

Answer 11

Flexion of forearm + wrist
Radial deviation

Median Nerve

Question 12

Anterior Forearm Superficial:
Flexor Carpi (wrist) Ulnaris

Action
Nerve Supply

Answer 12

Flexion of forearm + wrist
Ulnar deviation

Ulnar Nerve

Question 13

Anterior Forearm Superficial:
Flexor Digitorum (fingers) Superficialis

Action
Nerve Supply

Answer 13

Flexion of elbow + wrist
+ proximal finger joints

Median Nerve

Question 14

Posterior Forearm (Extensor) Muscles:
7 Superficial
Names and Nerve Supply

Answer 14

Brachioradialis
Anconeus
Ext. Carpi (wrist) radialis longus
Ext. Carpi (wrist) radialis brevis
Ext. Carpi (wrist) ulnaris
Ext. Digitorum (fingers) communis
Ext. Digiti (finger) Minimi

All supplied by Radial Nerve

Question 15

Posterior Forearm Superficial:
Brachioradialis

Action
Nerve Supply

Answer 15

Forearm flexion

Radial Nerve

Question 16

Posterior Forearm Superficial:
Anconius

Action
Nerve Supply

Answer 16

Forearm extension

Radial Nerve

Question 17

Posterior Forearm Superficial:
Extensor Carpi Radialis Longus

Action
Nerve Supply

Answer 17

Wrist extension/abduction

Radial Nerve

Question 18

Posterior Forearm Superficial:
Extensor Carpi Radialis Brevis

Action
Nerve Supply

Answer 18

Wrist extension

Radial Nerve

Question 19

Posterior Forearm Superficial:
Extensor Carpi Ulnaris

Action
Nerve Supply

Answer 19

Wrist extension/adduction

Radial Nerve

Question 20

Posterior Forearm Superficial:
Extensor Digitorum Communis

Action
Nerve Supply

Answer 20

Wrist and finger extension

Radial Nerve

Question 21

Posterior Forearm Superficial:
Extensor Digiti Minimi

Action
Nerve Supply

Answer 21

Pinky/Little finger extension

Radial Nerve

Question 22

UNLIKELY TO BE IN EXAM
Posterior Forearm Muscles:
5 Deep
Names, Actions and Nerve Supply

Answer 22

Supinator:
Supination of forearm

Extensor Indicis:
Extends index finger

Extensor Pollicis Longus +
Extensor Pollicis Brevis +
Abductor Pollicis Longus:
extend thumb

Radial Nerve