Unit 2 Flashcards by Mallory Fredricks

Coracoclavicular

Proximal Attachment Site: coracoid process of scapula
Distal Attachment Site: conoid tubercle of clavicle
Function: prevent separation between clavicle and coracoid process

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Coracoacromial

Proximal Attachment Site: coracoid process of scapula
Distal Attachment Site: acromion of scapula
Function: prevent upward displacement of humerus

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Glenohumeral

Proximal Attachment Site: margin of glenoid cavity
Distal Attachment Site: neck of humerus
Function: prevent excessive motion of humerus

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Acromioclavicular

Proximal Attachment Site: acromion of scapula
Distal Attachment Site: clavicle
Function: prevent separation between clavicle and acromion process

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Annular

Proximal Attachment Site: anterior margin of radial notch
Distal Attachment Site: posterior margin of radial notch
Function: stabilize the head of the radius against the ulna

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Radial Collateral

Proximal Attachment Site: lateral epicondyle of humerus
Distal Attachment Site: annular ligament
Function: prevent adduction of elbow

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Ulnar Collateral

Proximal Attachment Site: medial epicondyle of humerus
Distal Attachment Site: coronoid process and olecranon of ulna
Function: prevent abduction of the elbow

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Deltoid

Origin: spine and acromion of scapula; lateral 1/3 of clavicle
Insertion: deltoid tuberosity of humerus
Function: flexes, abducts, extends, rotates the arm
Innervation: axillary nerve

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Supraspinatus

Origin: suprasionous fossa of scapula
Insertion: greater tubercle of humerus
Function: abducts the arm
Innervation: suprascapular nerve

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Infraspinatus

Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Function: laterally rotates the humerus
Innervation: suprascapular nerve

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Teres minor

Origin: lateral border of dorsal scapula
Insertion: greater tubercle of humerus
Function: laterally rotates the humerus when arm is adducted
Innervation: axillary nerve

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Subscapularis

Origin: subscapular fossa of scapula
Insertion: lesser tubercle of humerus
Function: medially rotates the humerus
Innervation: upper and lower subscapular nerves

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Teres Major

Origin: lateral border of scapula
Insertion: intertubercular sulcus of humerus
Function: extends, adducts, medially rotates the humerus
Innervation: lower subscapular nerve

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Latissimus dorsi

Origin: iliac crest; thoracic and lumbar vertebrae
Insertion: intertubercular sulcus of humerus
Function: extends, adducts, medially rotates the arm
Innervation: thoracodorsal nerve

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Triceps brachii – long head

Origin: infraglenoid tubercle of the scapula
Insertion: olecranon of the ulna
Function: extends the arm at the shoulder and extends the forearm at the elbow
Innervation: radial nerve

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Triceps brachii – lateral head

Origin: lateral shaft of humerus
Insertion: olecranon of the ulna
Function: extends the forearm at the elbow
Innervation: radial nerve

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Triceps brachii – medial head

Origin: posterior shaft of the humerus
Insertion: olecranon of the ulna
Function: extends the forearm at the elbow
Innervation: radial nerve

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Anconeus

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Origin: posterior surface of the lateral epicondyle of the humerus
Insertion: olecranon of the ulna
Function: extends the forearm at the elbow
Innervation: radial nerve

Pectoralis major

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Origin: clavicle; sternum; and 7th rib
Insertion: greater tubercle of humerus
Function: flexes, medially rotates, and adducts the arm
Innervation: lateral and medial pectoral nerves

Pectoralis minor

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Origin: anterior of ribs 3-5
Insertion: coracoid process of the scapula
Function: protracts the scapula
Innervation: medial pectoral nerve

Serratus anterior

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Origin: upper eight ribs
Insertion: medial border of the scapula
Function: protracts and rotates the scapula
Innervation: long thoracic nerve

Coracobrachialis

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Origin: coracoid process of the scapula
Insertion: medial, midshaft of humerus
Function: flexes the arm at the shoulder
Innervation: musculocutaneous nerve

Biceps brachii – long head

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Origin: supraglenoid tubercle of the scapula
Insertion: radial (bicipital) tuberosity of radius
Function: flexes the arm at the shoulder; flexes the forearm at the elbow; supinates the forearm
Innervation: musculocutaneous nerve

Biceps brachii – short head

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Origin: coracoid process of the scapula
Insertion: radial (bicipital) tuberosity of radius
Function: flexes the arm at the shoulder; flexes the forearm at the elbow; supinates the forearm
Innervation: musculocutaneous nerve

Brachialis

Origin: anterior humeral shaft Insertion: coronoid process of the ulna Function: flexes the forearm at the elbow Innervation: musculocutaneous nerve

Flexor carpi radialis

Origin: medial epicondyle of humerus Insertion: base of 2nd and 3rd metacarpals Function: flexes the forearm at the elbow; flexes and adducts the wrist Innervation: median nerve

Flexor carpi ulnaris

Origin: medial epicondyle of humerus Insertion: pisiform, hamate, base of 5th metacarpal Function: flexes the forearm at the elbow; flexes and adducts the wrist Innervation: ulnar nerve

Palmaris longus

Origin: medial epicondyle of humerus Insertion: palmar aponeurosis Function: flexes the elbow; flexes the wrist Innervation: median nerve

Flexor digitorum superficials

Origin: medial epicondyle of humerus; anterior radius and ulna Insertion: middle phalanges 2-5 Function: flexes wrist and digits Innervation: median nerve

Pronator teres

Origin: medial epicondyle of humerus Insertion: lateral midshaft of radius Function: flexes the forearm at the elbow; pronates the forearm Innervation: median nerve

Pronator quadratus

Origin: distal ulna Insertion: shaft of radius Function: pronates the forearm Innervation: median nerve

Brachioradialis

Origin: lateral supracondylar ridge of humerus Insertion: styloid process of radius Function: flexes the forearm at the elbow Innervation: radial nerve

Extensor carpi radialis longus

Origin: supracondylar ridge of humerus Insertion: base of 2nd metacarpal Function: extends the elbow; extends and abducts the wrist Innervation: radial nerve

Extensor carpi radialis brevis

Origin: lateral epicondyle of humerus Insertion: base of 3rd metacarpal Function: extends the elbow; extends and abducts the wrist Innervation: radial nerve

Extensor carpi ulnaris

Origin: lateral epicondyle of humerus Insertion: base of 5th metacarpal Function: extends the elbow; extends and adducts the wrist Innervation: radial nerve

Extensor digitorum

Origin: lateral epicondyle of humerus Insertion: distal phalanges of digits 2-5 Function: extends the elbow, wrist, and digits Innervation: radial nerve

Extensor digiti minimi

Origin: lateral epicondyle of humerus Insertion: proximal phalanx of 5th digit Function: extends 5th digit Innervation: radial nerve

Extensor indicis

Origin: distal ulnar shaft Insertion: proximal phalanx of 2nd digit Function: extends 2nd digit Innervation: radial nerve

Supinator

Origin: lateral epicondyle of humerus Insertion: radius distal to radial tuberosity Function: supinates the elbow Innervation: radial nerve

Abductor pollicis longus

Origin: proximal ulna and radius Insertion: 1st metacarpal Function: abducts the thumb Innervation: radial nerve

Extensor pollicis longus

Origin: shaft of ulna and interosseous membrane Insertion: base of distal phalanx of thumb Function: extends the thumb Innervation: radial nerve

Extensor pollicis brevis

Origin: shaft of radius and interosseous membrane Insertion: base of proximal phalanx of thumb Function: extends the thumb Innervation: radial nerve

Flexor pollicis longus

Origin: anterior radius and interosseous membrane Insertion: distal phalanx of thumb Function: flexes the thumb Innervation: median nerve

Flexor digitorum profundus

Origin: coronoid process and shaft of ulna, interosseous membrane Insertion: distal phalanges 2-5 Function: flexes wrist and digits Innervation: ulnar nerve

Unit 2 Flashcards

(44 cards)