LAB Upper Limb Muscles

Coracobrachialis

Origin: coracoid process of the scapula

Insertion: medial surface of humerus

Action: flexion and adduction of humerus

Biceps Brachii

Origin: corachoid process of the scapula

Insertion: Radial Tuberosity

Action: flexes and supinates forearm

• 
• Brachialis

Origin: Lower half of humerus

Insertion: coronoid process of ulna

Action: flexes forearm

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• Brachioradialis

Origin: above laternal epicondyle of humerus

Insertion: lateral surface of radius above styloid process

Action: flexes forearm

Triceps Brachii

Origin: scapula

Insertion: olecranon process of ulna

Action: extends forearm

• 
• Supinator

Origin: later epicondyle of humerus

Insertion: lateral upper 1/3 od radius

Action: supinates forearm

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• Pronator Teres

Origin: medial epicondyle of humerus

Insertion: middle lateral surface of radius

Action: pronotes forearm

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• Flexor Carpis Radialis

origin: medial epicondyle of humerus

Insertion: 2nd and 3rd metacarpals

Action: flexes wrist

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• Flexor Carpis Ulnaris

Origin: medial epicondyle of huermus

Insertion: pisiform

Action: flexes wrist

• 
• Palmaris Longus

Origin: medial epicondyle of humerus

Insertion: palmar aponeurosis

Action: flexes wrist

• Flexor digitorum superficialis
• *deep to flexor carpi ulnaris

Origin: humerus

Insertion: middle phalanges of digits 2-5

Action: flexes middle and proximal phalanges of digits 1-5

• 
• Flexor pollicis longus

origin: radius, ulna

insertion: distal phalanx 1

Action: flexes thumb

• 
• Extensor Carpi radialis longus

origin: humerus

insertion: 2nd metacarpal

action: extends wrist

• 
• Extensor carpi radialis brevis

origin: humerus

insertion: 3rd metacarpal

action: extends wrist

Extensor Carpi Ulnaris

Origin: lateral epicondyle of humerus

Insertion: 5th metacarpal

Action: extends wrist

• Extensor Digitorum
• 
• Origin: lateral epicondyle of humerus

insertion: proximal and middle phalanges of digits 2-5

Action: extension of digits 2-5

Extensor Pollicis Longus

Origin: ulna and radius

Insertion: Distal Phalanx of Thumb

Action: Extends Thumb

Extensor Pollicis Brevis

Origin: Radius

Insertion: Proximal Phalanx of Thumb

Action: Extends thumb

• Abductor Pollicis Longus
• 
• Origin: interosseus membrane

Insertion: Trapezium and 1st metacarpal

Action: abducts thumb

Abductor Pollicis Brevis

Origin: flexor retinaculum

Insertion: proximal phalanx of thumb

action: Abducts thumb