Flexor retinaculum, palmar aponeurosis Origin

Skin of the palm Insertion

Palmaris brevis
Ulner nerve "superficial branch" Nerve supply

Corrugation of skin Action

Pisiform Origin

Base of the proximal phalanx "little finger" Insertion

Abductor digiti minimi brevis
Ulnar nerve "deep branch" Nerve supply

Abduction Action

Flexor retinaculum Origin

Base of the proximal phalanx "little finger" Insertion

Flexor digiti minimi brevis Hypothenar Eminence (3)
Ulnar nerve "deep branch" Nerve supply

Flexion Action

Palmar surface of the 5th metacarpal Origin

Base of the proximal phalanx "little finger" Insertion

Opponens digiti minimi
Ulnar nerve "deep branch" Nerve supply

Pulls the 5th metacarpal forward Action

Flexor retinaculum, scaphoid, trapezium Origin

Base of the proximal phalanx "thumb" Insertion

Abductor pollicis brevis
Median nerve Nerve supply

Abduction Action

Flexor terinaculum Origin

Base of the proximal phalanx "thumb" Insertion

Flexor pollicis brevis Thenar Eminence (3)
Median nerve Nerve supply

Flexion Action

Flexor terinaculum Origin

Lateral part of the 1st metacarpal Insertion

Opponens pollicis
Median nerve Nerve supply

Opposition Action

Oblique head: ant. bases of the 2nd & 3rd metacarpals

Origin Hand
Transverse head: 3rd metacarpal

Medial side of base of the proximal phalanx of thumb Insertion Adductor pollicis

Ulnar nerve "deep branch" Nerve supply

Adduction Action
Clavicular head: medial 1/2 of the clavicle
Tendons of flexor digitorum profundus Origin Origin Sternocostal head: sternum, 6 costal cartilages,
Extensor expansion of medial 4 fingers Insertion aponeurosis of the external obliqu muscles

Median nerve Nerve supply 1st & 2nd Insertion Bicipital groove of humerus
Pectoralis Major
Flex metacarpophalangeal joints Nerve supply Medial & Lateral pectoral nerve
Action
Extends interphalangeal joints Adduction of the arm
Lumbrical (4)
Tendons of flexor digitorum profundus Origin Action Medial Rotation of the arm

Extensor expansion of medial 4 fingers Insertion Clavicular head helps in flexion of the arm

Ulnar nerve "deep branch" Nerve supply 3rd & 4th Origin 3rd, 4th, 5th ribs close to the costal cartilage

Flex metacarpophalangeal joints Insertion Coracoid process

Action
Extends interphalangeal joints Pectoralis Minor Nerve supply Medial pectoral nerve

Base of 1st metacarpal Origin Depression of the shoulder

Pectoral region Action
Extensor expansion Draw the ribs upward & outward
Insertion
Proximal phalanges of thumb, index, ring, & little fingers 1st Origin 1st rib at its costal cartilage

Ulnar nerve Nerve supply Insertion Subclavian groove at the inferior surface ofbthe clavicle
Subclavius
Adduction of fingers Action Nerve supply Nerve to subclavius from upper trunk
Palmar interossei (4)
Ant. surface of shafts of 2nd, 4th & 5th metacarpals Origin Action Fixes the clavicle during movement of shoulder joint

Proximal phalanges of thumb, index, ring, & little fingers Origin Upper eight ribs
Insertion
Extensor expansion 2nd, 3rd & 4th Anterior aspect of the medial border and inferior
Insertion
angle of scapula
Ulnar nerve Nerve supply
Serratus anterior Nerve supply Long thoracic nerve
Adduction of fingers Action
Draws the scapula forward in boxing
Contiguous sides of shafts of metacarpals Origin
Action Rotates scapula outwards in
Proximal phalanes of index, ring and mid fingers raising the arm above 90 degree
Insertion
Extensor expansion Dorsal interossei (4) Origin Spines of thoracic vertebrae
Ulnar nerve Nerve supply Insertion Bicipital groove of humerus
Abduction of fingers Action Nerve supply Thoracodorsal nerve
Vertebral Column to humerus Latissimus dorsi
Long head: supraglenoid tubercle of scapula Extension
Origin
Short head: tip of coracoid process Action Adduction
Post. Part of radial tuberosity Medial rotation of humerus
To the deep fascia of the medial aspect of the Insertion
Origin Spines of cervical & thoracic vertebrae
forearm through bicpital aponeurosis Biceps brachii
Lateral 1/3 of clavicle, acromion, spine of
Musculocutaneous Nerve supply Insertion
scapula
Strong supination Nerve supply Accessory Nerve
Trapezius
Strong flexion of elbow Action Upper fibers: elevate scapula
Superficial
Weak flexion of shoulder Anterior Action Middle fibers: retract scapula
Tip of coracoid process Origin Lower fibers: depress scapula
Muscles of the back
Middle of the medial side of humerus Insertion Origin Cervical transverse processes
Coracobrachialis Vertebral Column to scapula
Musculocutaneous Nerve supply Insertion Medial border of scapula
Arm Levator Scapulae
Flexion & weak adduction of arm Action Nerve supply Dorsal Scapular nerrve
Front of the lower half of humerus Origin Action Elevates scapula
Upper Limb
Ant. Surface of coronoid process of ulna Insertion Origin Thoracic spines
Brachialis
Musculocutaneous & radial nerve Nerve supply Insertion Medial border of scapula
Rhomboid major & minor
Strong flexion of forearm Action Nerve supply Dorsal Scapular nerve
Long head: infraglenoid tubercle of scapula Action Retract scapula
Lateral head: upper half of the post. surface of Nerve supply Anterior rami of thoracic spinal nerves
humerus "above spiral groove" Origin Serratus posterior superior
Action Rib elevator
Medial head: lower half of the post. surface of Intermediate
humerus "below spiral groove" Triceps Posterior Nerve supply Anterior rami of thoracic spinal nerves
Serratus posterior inferior
Upper surface of olecranon process of ulna Insertion Action Rib depressor

Radial nerve Nerve supply Lateral 1/3 of clavicle, acromion, spine of

Origin
scapula
Strong extension of elbow Action
Insertion Deltoid tuberosity of humerus
Common flexor origin "medial epicondyle" Origin
Nerve supply Axillary nerve
Middle of lat. surface of radius Insertion
Pronator teres Deltoid Anterior fibers: flexion & medial rotation of
Median nerve Nerve supply humerus
Pronation & flexion of forearm Action Middle fibers: abduction of humerus from
Action
15-90 degrees
Common flexor origin "medial epicondyle" Origin
Posterior fibers: extension & lateral rotation of
Base of 2nd metacarpal bone Insertion
humerus
Flexor carpi radialis
Median nerve Nerve supply
Origin Supraspinous fossa
Flexion & abduction of hand Action
Insertion Greater tuberosity of humerus
Superficial (4)
Supraspinatous
Common flexor origin "medial epicondyle" Origin
Nerve supply Suprascapular nerve
Flexor retinaculum & palmar aponeurosis Insertion
Action Abduction of humerus from 0-15 degrees
Palmaris longus
Median nerve Nerve supply
Origin Infrasoinous fossa
Flexion of hand & tightens palmer aponeurosis Action
Insertion Greater tuberosity of humerus
Infraspinatous
Common flexor origin "medial epicondyle" Origin
Nerve supply Suprascapular nerve
Shoulder region
Pisiform, hook of hamate, base of 5th metacarpal bone Insertion
Action Lateral rotation of humerus
Flexor carpi ulnaris
Ulnar nerve Nerve supply
Origin Lateral border of scapula
Flexion & adduction of hand Action
Insertion Bicipital groove of humerus
Common flexor origin "medial epicondyle"
Nerve supply Lower subscapular nerve
Anterior (8) Teres major
Coronoid process of ulna Origin
Extension
Ant. surface of radius
Action Adduction
Base of middle phalanges of medial 4 fingers Insertion Flexor digitorum superficialis Intermediate (1)
Medial rotation of humerus
Median nerve Nerve supply
Origin Lateral border of scapula
Flexion of middle and proximal
Action Insertion Greater tuberosity of humerus
phalanges and hand Teres minor
Nerve supply Axillary nerve
Bases of distal phalanges of medial 4 fingers Insertion
Action Lateral rotation of humerus
Median nerve Nerve supply Flexor digitorum profundus
Origin Subscapular fossa
Flexion of distal phalanges Action
Insertion Lesser tuberosity of humerus
Base of distal phalanx of thumb Insertion Subscapularis
Nerve supply Upper & lower subscapular nerve
Median nerve Nerve supply
Action Medial rotation of humerus
Interphalangeal of thumb Flexor pollicis longus
Deep (3)
Metacarpophalangeal of thumb Flexion of Action

Carpometacarpal of thumb Forearm

Distal fourth of ant. surface of radius Insertion

Median nerve Nerve supply

Pronator quadratus
Pronation of forearm
Action
Helps in holding bones together

Lateral supracondylar ridge of humerus Origin

Base of styloid process of radius Insertion

Brachioradialis
Radial nerve Nerve supply

Midprone position & flexion of forearm Action

Lateral (2)
Lateral supracondylar ridge of humerus Origin

Post. surface of base of 2nd metacarpal bone Insertion

Extensor carpi radialis longus
Radial nerve Nerve supply

Extension and abduction of hand Action

Radial nerve Nerve supply Anconeus

Common extensor origin "lateral epicondyle" Origin

Base of 3rd metacarpal bone Insertion Extensor carpi radialis brevis

Radial nerve "deep branch" Nerve supply

Common extensor origin "lateral epicondyle" Origin

Extensor expansion of the medial 4 fingers Insertion Extensor digitorum

Radial nerve "deep branch" Nerve supply Superficial (5)

Common extensor origin "lateral epicondyle" Origin

Extensor expansion of the little finger Insertion Extensor digiti minimi

Posterior (10)
Radial nerve "deep branch" Nerve supply

Common extensor origin "lateral epicondyle" Origin

Base of the 5th metacarpal bone Insertion Extensor carpi ulnaris

Radial nerve "deep branch" Nerve supply

Posterior interosseous nerve Nerve supply Supinator

Posterior interosseous nerve Nerve supply Abductor pollicis longus

Posterior interosseous nerve Nerve supply Extensor pollicis brevis Deep (5)

Posterior interosseous nerve Nerve supply Extensor pollicis longus

Posterior interosseous nerve Nerve supply Extensor indices