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Shoulder and Arm Muscles
O:I:F:NN
22
Anatomy
Undergraduate 3
10/01/2009

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Term
Deltoid
Definition
O: Clavicular, Acromial, Spinal Parts
I: Deltoid Tuberosity
F: Abductor (Most important)
NN: Axillary
Term
Lattissimus Dorsi
Definition
O: Vertebral, Thoracolumbar, Iliac, Costal
I: Crest of lesser tubercle
F: Adduction, medial rotation and extension
NN: Thoracodorsal
Term
Serratus Anterior and Injury to nerve
Definition
O: 1st-9th ribs
I: Superior to inferior angle and medial border of scapula
F: Elevation over 90
NN: Long Thoracic
P: Winged Scapula
Term
Coracobrachialis
Definition
O: Coracoid process
I: Medial surface of humerus
F: Flexion and adduction
NN: Musculocutaneous
Term
Pectoralis Minor
Definition
O: 3-5th ribs
I: Coracoid process
F: Lowers and rotates scapula
NN: Medial pectoral
Term
Pectoralis Major
Definition
O: Clavicular, Sternocostal, Abdominal
I: Crest of greater tubercle
F: Adduction and medial rotation
NN: Lateral and medial pectoral
Term
Subclavius
Definition
O: First costal cartilage
I: Inferior surface of acromial end of clavicle
F: Pulls clavicle towards sternum
NN: Subclavian from brachial plexus
Term
Biceps
Definition
O: Coracoid process and supraglenoid tubercle
I: Radial tuberosity and forearm fascia
Long F - Abductor and medial rotator
Short F - Adductor
Both F - Flex shoulder and elbow joint
NN: Musculocutaneous
Term
Brachialis
Definition
O: Distal half of humerus anteriorly
I: Ulnar tuberosity and coronoid process
F: Powerful flexor of elbow joint
NN: Musculocutaneous
Term
Coracobrachialis
Definition
O: Coracoid process
I: Medial surface of humerus
F: Flexor
NN: Musculocutaneous
Term
Triceps
Definition
Long O: Infraglenoid tubercle
Lat. & Medial O: Humerus
I: Olacranon process
All F: Chief extensor of elbow
Long F: Retroversion and adduction
NN: Radial
Term
Extensor Carpi Ulnaris
Definition
O: Common head and ulnar head
I: Base of 5th metacarpal
F: Extends and adducts hand
NN: Post. Interosseous branch of deep radial
Term
Abductor pollicis brevis
Definition
O: Scaphoid tubercle and flexor retinaculum
I: Radial sesamoid and proximal phalanx
F: Abduction of thumb
NN: Median
Term
Flexor pollicus brevis
Definition
Superficial head O: Flexor retinaculum
Deep head O: Trapezium, Tarpezoid, Capitate
I: Sesamoid bone of metacarpophalangeal J.
F: Flexes thumb
Superficial NN: Median
Deep NN: Ulnar
Term
Adductor Pollicis
Definition
Transverse head O: 3rd Metacarpal bone
Oblique O: Capitate and trapezoid carpals, 2nd metacarpal base
I: Base of proximal phalanx of thumb
F: Thumb adduction
NN: Deep branch of ulnar nerve
Term
Opponens pollicis
Definition
O: Tubercle trapezium and flexor retinaculum
I: Radial margin of 1st metacarpal
F: Thumb opposition
NN: Medial
Term
Abductor digiti minimi
Definition
O: Pisiform, Pisohamate Lig. Flexor Retinaculum
I: Base of proximal phalanx of 5th digit
F: Abducts 5th digit
NN: Deep branch of ulnar nerve
Term
Flexor digiti minimi
Definition
O: Flexor retinaculum and hamate hamulus
I: Base of proximal phalanx of 5th digit
F: Flexes 5th digit
NN: Deep branch of ulnar nerve
Term
Opponens digit minimi
Definition
O: Flexor retinaculum and hamate hamulus
I: Ulnar margin of 5th metacarpal
F: Makes opposition of 5th finger to thumb possible
NN: Deep branch of ulnar nerve
Term
Palmar interossei
Definition
O: 2nd, 4th and 5th metacarpals
I: Corresponding proximal phalanges and dorsal aponeurosis
F: Adduction of digits, assist lumbricals
NN: Deep branch of Ulnar N
Term
Dorsal Interossei
Definition
O: Adjacent sides of two metacarps
I: Base of 2nd-4th proximal phalanges and dorsla aponeurosis
F: Abduction of digits
NN: Deep branch of ulnar N
Term
Lumbricals
Definition
O: Tendon of flexor digitorum profundus
I: Lateral sides of dorsal aponeurosis
Lateral NN: Medial
Medial NN: Ulnar
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