Arm, Elbow, Hand Flashcards
Biceps Brachii
O: Long Head: supraglenoid tubercle of scapula
Short Head: coracoid process
I: Radial Tuberosity
Inn: Musculotaneous n. (C5-C6)
A: Elbow flexion, supination; Shoulder flex, stabilization of humeral head during deltoid contraction; Humerus abduction and internal rotation.
(Elbow Flexed Biceps act as powerful supinator)
Coracobrachialis
O: Coracoid Process
I: Inline with crest of lesser tubercle
Inn: Musculocutaneous (C5-C7)
A: flexion, adduction, internal rotation
Brachialis
O: Distal anterior half of humerus
I: Ulnar Tuberosity
Inn: Musculocutaneous (C5-C6)
A: flexion at elbow joint
Triceps Brachii
O: Long Head: Infraglenoid tubercle of scapula
Medial Head: Posterior Humerus, inferior to radial groove
Lateral Head: Post Humerus, proximal to radial groove
I: Olecranon of Ulna
Inn: Radial n. (C6-C8)
A: Elbow: extension
Shoulder: (Long Head) Extension and adduction
Brachioradialis
O: Distal humerus
I: Styloid process of radius
Inn: Radial n. (C5,C6)
A: Elbow Flex., Minor pronation at forearm
Extensor Carpi Radialis Longus
O: Lateral supracondylar ridge of distal humerus
I: Base of 2nd Metacarpal
Inn: Radial n. (C6,C7)
A: Weak Elbow Flex. , Wrist Ext and radial deviation
Extensor Carpi Radialis Brevis
O: Lateral epicondyle of humerus
I: Base of 3rd metacarpal
Inn: Radial n. (C7,C8)
A: Weak elbow flex., Wrist ext and radial deviation
Extensor Digitorum
O: Lateral epicondyle of humerus
I: Dorsal digital expansion of 2nd-5th digits
Inn: Radial n. (C7,C8) Posterior Interosseous
A: Wrist: Ext.
MCP, PIP, DIP 2-5: Extension, Abduction of fingers
Extensor Digitorum minimi
O: Lateral Epicondyle of humerus
I: Dorsal digital expansion of 5th digit
Inn: Radial n. (C7,C8)
A: Wrist: Ext., Ulanr deviation
MCP, PIP, DIP 5th digit: Ext/ABD of 5th digit.
Extensor Carpi Ulnaris
O: Lateral Epicondyle of humerus, dorsal surface of ulnar
I: Base of the 5th metacarpal
Inn: Radial n. (C7,C8) Posterior Interosseous
A: Wrist Ext., Ulnar Deviation
Supinator
O: Olecranon, lateral epicondyle, RCL, anular ligament
I: Radius (between radial tuberosity and insertion of pronator teres
Inn: Radial n. (C6,C7) Posterior Interosseous
A: Supination
Abductor Pollicis Longus
O: Dorsal surface of radius and ulnar interosseous
I: Base of 1st metacarpal
Inn: Radial n. (C7,C8) Posterior Interosseous
A: Radial deviation, Abduction of 1st metacarpal
Extensor Pollicis Brevis
O: Dorsal surface of radius and IO membrane
I: Base of proximal phalanx of thumb
Inn: Radial n. (C7,C8) Posterior Interosseous
A: Radial deviation, 1st digit extension
Extensor Pollicis Longus
O: Dorsal surface of Ulna and IO membrane
I: Base of distal phalanx of thumb
Inn: Radial n. (C7,C8) Posterior Interosseous
A: Wrist Ext., Radial deviation. Adduction/Ext. of thumb
Extensor Indicis
O: Dorsal surface of Ulna and IO membrane
I: Posterior digital extension of 2nd digit
Inn: Radial n. (C7,C8) Posterior Interosseous
A: Wrist extension, 2nd digit extension.
Pronator Teres
O: Humeral Head: Medial Epicondyle of Humerus
Ulnar Head: Coronoid Process
I: Lateral Radius (Distal to Supinator Insertion)
Inn: Median n. (C6,C7)
A: Weak elbow flexor, Forearm Pronation
Flexor Carpi Radialis
O: Medial Epicondyle of Humerus
I: Base of 2nd Metacarpal (Variance: Base of 3rd Metacarpal)
Inn: Median n. (C6,C7)
A: Wrist Flexion, Radial Deviation
Palmaris Longus
O: Medial Epicondyle of Humerus
I: Palmar Aponeurosis
Inn: Median n. (C7,C8)
A: Weak Elbow Flexion, Wrist flexion tightens palmar aponeurosis
Flexor Carpi Ulnaris
O: Medial Epicondyle of Humerus; Olecranon of Ulna
I: Pisiform; Hook of Hamate; Base of 5th Metacarpal
Inn: Ulnar n. (C7-T1)
A: Wrist Flexion, Ulnar deviation of hand
Flexor Digitorum Superficialis
O: Medial Epicondyle of Humerus (Humeral-Ulnar Head); Upper 1/2 of anterior border of radius
I: Sides of middles phalanges 2nd-5th digits
Inn: Median n. (C8, T1)
A: Weak Elbow Flexor, Wrist Flexion, Flexion of MCP, PIP of 2nd-5th digits
Flexor Digitorum Profundus
O: Proximal 2/3 of Flexor Surface of Ulna; Interosseous Membrane
I: Distal Phalanges of 2nd to 5th Digits (Palmar Surface)
Inn: 2-3 Anterior Ante Brachial Interosseous n. , 4-5 ulnae n.
A: Flexion of Wrist, MCP, PIP, DIP of 2nd to 5th Digits
Flexor Pollicis Longus
O: Mid-anterior surface of radius, adjacent interosseous membrane
I: Distal phalanx of tumb (Palmar Surface)
Inn: Anterior Ante Brachial Interosseous n.
A: Wrist Flexion, Radial Deviation, Flexion Carpometacarpal of Thumb, Flexion MCP, IP of Thumb
Pronator Quadratus
O: Distal 1/4 of Anterior Ulnar Surface
I: Distal 1/4 of Anterior Radial Surface
Inn: Anterior Ante Brachial Interosseous n.
A: Pronation; Distal Radioulnar Joint Stablization
