muscle s of upper limb
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MUSCLES OF UPPER LIMB
Muscles of shoulder region
Muscles of elbow region
Muscles of wrist region
Muscles of hand
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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
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From scapula to humerus
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Lesser tubercle
Upper and lower sub
scapular nerves
Medial rotation and
adductor of arm
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Greaterv tubercle
Supra scapular
nerve C5 C6
Initiates abduction of
arm (15 degrees)
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Supra scapular nerve C5 C6
Lateral rotation of arm
Greater tubercle
Axillary nerve C 5 C6
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Muscles of rotator cuff
Subscapularis
Supraspinatus
Infraspinatus
Teres minor
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Bicipital groove
medial lip
Lower subscapular nerve
Medial rotation and
adductor of arm
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Medial border
Musculo cutaneous
nerve C 5,6,7
Flexor of arm
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From trunk to scapula
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Medial border
Upper 8 ribs
Long thoracic nerve or
Nerve of bell C5,6,7
Pushing and punching
movements
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Transverse process
of C1 C2 C3
Sup ,angle
Branch from dorsal
scapular nerve C 5
Elevates scapula
Steadies scapula during
movements of arm
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TRAPEZIUS
Spinal part of accessary nerve
Elevates scapula
Retract scapula
Steadies scapula
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Dorsal scapular nerve C5
C7 –T1 minor
T2 –T5 major
Root of spine
Retract scapula
Medial border
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3 4 5 ribs
Corocoid process
Medial & lateral
pectoral nerves
Drawes scapula forwards
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From trunk to humerus
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Lateral lip of
biciptal groove
Medial & lateral
pectoral nerves
Adduction
Medial rotation
2nd to 6th costal cartilages
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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
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Deltoid tuberosity
Axillary nerve C 5 6
Acromial fibres –abductor of arm
Ant .fibres -flexors & medial rotator
post,.fibres -extensor & lateral rotator
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Muscles of elbow region
Flexors Extensors Pronators supinators
Brachialis Triceps Pronator teres Supinator
Biceps Anconeus Pronator
quadratus
Biceps
Brachioradiolis
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flexors
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Suparglenoid tubercle
Radial tuberosity
Long head
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Musculocutaneous nerve C5 C6
Actions 1. strong supinator
when arm is flexed
2. flexor of arm
Biceps
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Musculocutaneous nerve C5
C6
flexor of arm
Ulnar tuberosity
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Radial nerve C5 6 7 *
Flexor of fore arm in
mid prone position
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Extensors
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Radial nerve
Extensor of elbow
Spiral groove
Infra glenoid
tubercle
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Radial nerve
Weak extensor of
elbow
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Pronators
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Common
flexor origin
Median nerve
Pronator of elbow
Flexor of elbow
Coronoid process
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Anterior interosseous
nerve
Pronator of fore arm
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Supinators
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Posterior
interosseous nerve
Supinator of fore arm
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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
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Flexors
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Median nerve
Ulnar nerve
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Median nerve
Inserted into flexar retinaculum
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Extensors
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Radial nerve
Posterior intrrosseus nerve
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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
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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
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Extrinsic muscles
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flexors
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Medial half by ulnar nerve
Lateral half by AIN of median nerve
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Median nerve (sublimus)
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Extensors
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Common extensor origin
Base of middle
and distal phalanx
dorsal aspect
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Posterior interossei nerveBase of middle and distal
phalanx dorsal aspect of little
finger
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Posterior interosseus nerve
Extension of
index finger
Joins the tendon of extensor digitorum
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Long muscles
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Anterior
interosseous
nerve
Flexes the
distal phalynx
of thumb
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Base of the
metacarpal
Posterior
interosseous
nerve
Abduction
& extension
of thumb
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Extention of all
joints of thumb
Posterior interosseous nerve
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Intrinsic muscles
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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
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Dorsal
L M
ABductor of
digitsUlnar nerve
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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
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THENAR
MUSCLES
Median
nerve
Abduction
Flexion
Opposition of
THUMB
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Ulnar nerve
Adducts the thumb
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HYPOTHENAR
MUSCLES
Ulnar nerve
Pisiform
Hamate
Flexes 5th
metacarpal &
rotates it laterally
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