Muscles Flashcards by Melissa Teoh | Brainscape

Q

Action of Rhomboids minor & major

A

Retract scapula.

Stabilize scapula.

Rotate glenoid cavity downward.

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Q

Origin of Rhomboids minor & major

A

Spinous processes of C7 and T3-T5

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Q

Insertion of Rhomboids minor & major

A

Medial border of scapula.

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Q

Innervation of Rhomboids minor & major

A

Dorsal scapular n.

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Q

Action of Pectoralis major

A

flexes, medial rotate, and abducts arm

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Q

Origin of Pectoralis major

A

clavicle, sternum, ribs 1-6

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Q

Insertion of Pectoralis major

A

Intertabercular groove of humerus

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Q

Innervation of Pectoralis major

A

pectoral n.

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Q

Action of Deltoid

A

Abduct humerus

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Q

Action teres major

A

extend and laterally rotate arm at shoulder joint

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Q

Action of Teres minor

A

Extend and laterally rotate arm at shoulder joint

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Q

Action of Supraspinatus

A

Abduct humerus

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Q

action of Infraspinatus

A

lateral rotate humerus

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Q

Action of Triceps brachii

A

forearm extension

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Q

Action of Biceps brachii

A

Flex elbow, flex shoulder, and supinate forearm

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Q

Action of Brachioradialis

A

Synergist of elbow flexion

Q

Action of Brachialis

A

Flexor of elbow

Q

Action of Coracobrachialis

A

Adduction and flexion at shoulder

Q

Origin of Coracobrachialis

A

Coracoid process (on scapula)

Q

Origin of Brachialis

A

Anterior distal humerus

Q

Origin of Brachioradialis

A

Distal humerus

Q

Origin of Biceps brachii

A

Short head: Coracoid process

Long head: supraglenoid tubercle

Q

Origin of Triceps brachii

A

Long head: glenoid cavity inferior margin.

Lateral head: posterior humerus.

Medial head: posterior humerus distal radial groove.

Q

Origin of Subscapularis

A

Subscapular fossa

Q

Origin of Infraspinatus

A

Infraspinous fossa

Q

Origin of Supraspinatus

A

Supraspinous fossa

Q

Origin of Teres minor

A

Lateral border scapula

Q

Origin of Teres major

A

Posterior surface of Inferior border of scapula

Q

Origin of Deltoid

A

Clavicle, acromion and spine of scapula