Muscles - Back Flashcards by Spencer Swayne | Brainscape

Q

Trapezius (s) insertion

A

Clavical and scapula (acromiam process and spine)

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Q

Trapezius (s) origin

A

Posterior vertebrae, occipital bone

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Q

Trapezius (s) action

A

Moves scapula superiorly, anteriorly, and inferiorly

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Q

Deltoid (s) origin

A

Clavicle, scapula (acromian process and spine)

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Q

Deltoid (s) insertion

A

Humerus

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Q

Deltoid (s) action

A

Abduct and flex humerus

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Q

Supraspinatus (d) origin

A

Supraspinous fossa of scapula

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Q

Supraspinatus (d) insertion

A

Humerus (greater tubercle)

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Q

Supraspinatus (d) action

A

Abducts humerus

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Q

Infraspinatus (d) origin

A

Infraspinous fossa of scapula

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Q

Infraspinatus (d) insertion

A

Humerus (greater tubercle)

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Q

Infraspinatus (d) action

A

Rotates humerus laterally

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Q

Teres major (d) origin

A

Scapula

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Q

Teres major (d) insertion

A

Humerus

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Q

Teres major (d) action

A

Extends & adducts humerus

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Q

Teres minor origin

A

Lateral border of scapula

Q

Teres minor insertion

A

Humerus (greater tubercle)

Q

Teres minor action

A

Rotates humerus laterally

Q

Rhomboideus major (d) origin

A

Thoracic vertebrae

Q

Rhomboideus major (d) insertion

A

Scapula

Q

Rhomboideus major (d) action

A

Retracts and elevates scapula

Q

Erector spinae or sacrospinalis (d) origin

A

Sacrum, lumbar vertebrae, iliac crest

Q

Erector spinae or sacrospinalis (d) insertion

A

Lumbar vertebrae, inferior ribs

Q

Erector spinae or sacrospinalis (d) action

A

Extends vertebral column

Q

Semispinalis capitis origin

A

C7 and thoracic vertebrae (transverse processes)

Q

Semispinalis capitis insertion

A

Occipital bone & spinous process of cervical vertebrae and T1-T4

Q

Semispinalis capitis action

A

Draws head backward