Back Flashcards by Hailey Haas

Q

Trapezius action

A

Upper fibers elevate scapula

Middle fibers retract scapula

Lower fibers depress scapula

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Q

Trapezius innervation

A

Spinal accessory nerve CN XI

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Q

Latissimus Dorsi action

A

Extends, adducts, and medially rotates arm

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Q

Latissimus Dorsi innervation

A

Thoracodorsal n

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Q

Deltoid action

A

Anterior flexes arm

Middle abducts 15 to 90 degrees

Posterior extends arm

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Q

Deltoid innervation

A

Axillary nerve

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Q

Levator scapulae action

A

Elevates scapula

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Q

Levator scapulae innervation

A

Dorsal scapular nerve

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Q

Rhomboids action

A

Retracts scapula

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Q

Rhomboids innervation

A

Dorsal scapular nerve

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Q

Dorsal scapular nerve innervates which two muscles

A

Levator scapulae and rhomboids

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Q

Teres major action

A

Adducts and medially rotates arm

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Q

Teres major innervation

A

Lower subscapular nerve

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Q

Subscapularis action

A

Adducts and medially rotates arm

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Q

Subscapularis innervation

A

Upper and lower subscapular nerve

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Q

Which two muscles adduct and medially rotates arm

A

Teres major and subscapularis

Q

Supraspinatus action

A

Abduction up to 15 degrees, initiates abduction

Q

Supraspinatus innervation

A

Suprascapular nerve

Q

Infraspinatus action

A

Laterally rotates arm

Q

Infraspinatus innervation

A

Suprascapular nerve

Q

Which two muscles innervated by suprascapular nerve

A

Supraspinatus and infraspinatus

Q

Teres minor action

A

Laterally rotates arm

Q

Teres minor innervation

A

Axillary nerve

Q

Which two muscles laterally rotates arm

A

Infraspinatus and teres minor

Which are the 4 rotator cuff muscles

Subscapularis, supraspinatus, infraspinatus, teres minor

Erector spinae action

Extends and laterally rotates vertebral column

Erector spinae nerve

Dorsal rami of spinal nerves