Muscles Of The Thorax Flashcards by Lauren kim | Brainscape

Q

Pectoralis major

A

Origin: Clavicle,Sternum, and Ribs 2-7

Insertion: Humerus

Action: Adducts and medically rotates the arm

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Q

Serratus anterior

A

Origin: Ribs 1-9

Insertion: Scapula

Action: abducts and rotates the scapula

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Q

Deltoid

A

Origin: Clavicle and Scapula

Insertion: Humerus

Action: abducts and rotates the arm

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Q

Pectoralis minor

A

Origin: Ribs 2-5

Insertion: Scapula

Action: abducts and rotates the Scapula

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Q

External intercostal

A

Origin: Inferior border of the rib above

Insertion: Superior border of the rib below

Action: Elevates the rib cage in normal inhalation

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Q

Internal intercostal

A

Origin: Superior border of the rib below

Insertion: Inferior border of the rib above

Action: Depresses the rib cage

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Q

Coracobrachialis

A

Origin: Scapula

Insertion: Humerus

Action: Flexes and adducts the arm

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Q

Subscapularis

A

Origin:Scapula

Insertion: Humerus

Action: rotates the arm

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Q

Diaphragm

A

Origin: Ribs, Sternum, and Lumbar Vertebrae

Insertion: Central Tendon

Action: Inspire or inhale

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