muscle s of upper limb

MUSCLES OF UPPER LIMB

Muscles of shoulder region

Muscles of elbow region

Muscles of wrist region

Muscles of hand

Muscles of shoulder region

From scapula to

humerus

From trunk to

scapula

From trunk to

humerus

Subscapularis Serratus anterior Pectoralis major

Supraspinatus Trapezius latissimusdorsi

Infraspinatus Rhomboidis major

Teres minor Rhomboidis minor

Teres major Levator scapulae

coracobrachialis Pectoralis minor

From scapula to humerus

Lesser tubercle

Upper and lower sub

scapular nerves

Medial rotation and

adductor of arm

Greaterv tubercle

Supra scapular

nerve C5 C6

Initiates abduction of

arm (15 degrees)

Supra scapular nerve C5 C6

Lateral rotation of arm

Greater tubercle

Axillary nerve C 5 C6

Muscles of rotator cuff

Subscapularis

Supraspinatus

Infraspinatus

Teres minor

Bicipital groove

medial lip

Lower subscapular nerve

Medial rotation and

adductor of arm

Medial border

Musculo cutaneous

nerve C 5,6,7

Flexor of arm

From trunk to scapula

Medial border

Upper 8 ribs

Long thoracic nerve or

Nerve of bell C5,6,7

Pushing and punching

movements

Transverse process

of C1 C2 C3

Sup ,angle

Branch from dorsal

scapular nerve C 5

Elevates scapula

Steadies scapula during

movements of arm

TRAPEZIUS

Spinal part of accessary nerve

Elevates scapula

Retract scapula

Steadies scapula

Dorsal scapular nerve C5

C7 –T1 minor

T2 –T5 major

Root of spine

Retract scapula

Medial border

3 4 5 ribs

Corocoid process

Medial & lateral

pectoral nerves

Drawes scapula forwards

From trunk to humerus

Lateral lip of

biciptal groove

Medial & lateral

pectoral nerves

Adduction

Medial rotation

2nd to 6th costal cartilages

Post.layer of lumbar

fascia thus attatching

the muscle to L-S spine

T 7 –T 12 spines

Inter

tubercular

sulcus

Thoracodorsal nerve C 6 7 8

Climbing

muscle

Adduction

External & medial

rotation as in swimming

Deltoid tuberosity

Axillary nerve C 5 6

Acromial fibres –abductor of arm

Ant .fibres -flexors & medial rotator

post,.fibres -extensor & lateral rotator

Muscles of elbow region

Flexors Extensors Pronators supinators

Brachialis Triceps Pronator teres Supinator

Biceps Anconeus Pronator

quadratus

Biceps

Brachioradiolis

flexors

Suparglenoid tubercle

Radial tuberosity

Long head

Musculocutaneous nerve C5 C6

Actions 1. strong supinator

when arm is flexed

2. flexor of arm

Biceps

Musculocutaneous nerve C5

C6

flexor of arm

Ulnar tuberosity

Radial nerve C5 6 7 *

Flexor of fore arm in

mid prone position

Extensors

Radial nerve

Extensor of elbow

Spiral groove

Infra glenoid

tubercle

Radial nerve

Weak extensor of

elbow

Pronators

Common

flexor origin

Median nerve

Pronator of elbow

Flexor of elbow

Coronoid process

Anterior interosseous

nerve

Pronator of fore arm

Supinators

Posterior

interosseous nerve

Supinator of fore arm

Muscles of wrist region

Flexors Extensors

Flexor carpi ulnaris Extensor carpi ulnaris

Flexor carpi radialis Extensor carpi radialis

longus

Palmaris longus Extensor carpi radialis

brevis

Flexors

Median nerve

Ulnar nerve

Median nerve

Inserted into flexar retinaculum

Extensors

Radial nerve

Posterior intrrosseus nerve

Muscles of hand

Extrinsic muscles

Flexors Extensors Long muscles

FDP Extensor digitorum Flexor pollicis longus

FDS Extensor digiti minimi Abductor pollicis

longus

Extensor indicis Extensor pollicis

longus

Intrinsic muscles

Interossei Lumbricals Short muscles of

thumb

Short muscles of

little finger

Thenar

muscles

Hypothenar

muscles

Adductor pollicis

Flexor

ABductor

Opponence

pollicis brevis

Flexor

ABductor

Opponence digiti

minimi

Extrinsic muscles

flexors

Medial half by ulnar nerve

Lateral half by AIN of median nerve

Median nerve (sublimus)

Extensors

Common extensor origin

Base of middle

and distal phalanx

dorsal aspect

Posterior interossei nerveBase of middle and distal

phalanx dorsal aspect of little

finger

Posterior interosseus nerve

Extension of

index finger

Joins the tendon of extensor digitorum

Long muscles

Anterior

interosseous

nerve

Flexes the

distal phalynx

of thumb

Base of the

metacarpal

Posterior

interosseous

nerve

Abduction

& extension

of thumb

Extention of all

joints of thumb

Posterior interosseous nerve

Intrinsic muscles

Palmar

shorthead Long head

Ulnar nerve

Base of proximal

phalynx of same side

Digital

expansion

1st medial side of 1st metacapal

2nd medial side of 2nd metacapal

3rd lateral side of 4th metacarpal

4th lateral side of 5th meta crpal

ADDuction of digits

Dorsal

L M

ABductor of

digitsUlnar nerve

FDP

tendon

123

4

1st & 2nd median nerve

3rd & 4th ulnar nerve

Flexion at MP JOINT

Extension at PIP JOINT

Radial side

of MP joint

THENAR

MUSCLES

Median

nerve

Abduction

Flexion

Opposition of

THUMB

Ulnar nerve

Adducts the thumb

HYPOTHENAR

MUSCLES

Ulnar nerve

Pisiform

Hamate

Flexes 5th

metacarpal &

rotates it laterally