Scapular Region Muscles Flashcards

1
Q

deltoid (origin)

A

lateral third of clavicle, acromion, and spine of scapula

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2
Q

deltoid (insertion)

A

middle of lateral surface of shaft of humerus

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3
Q

deltoid (nerve)

A

axillary nerve

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4
Q

deltoid (action)

A

middle fibers abduct arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm

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5
Q

supraspinatus (origin)

A

supraspinous fossa of scapula

rotator cuff or SITS muscle

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6
Q

supraspinatus (insertion)

A

greater tuberosity of humerus; capsule of shouler joint

rotator cuff or SITS muscle

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7
Q

supraspinatus (nerve)

A

suprascapular nerve

rotator cuff or SITS muscle

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8
Q

supraspinatus (action)

A

abducts arm and stabilizes shoulder joint

rotator cuff or SITS muscle

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9
Q

infraspinatus (origin)

A

infraspinous fossa of scapula

rotator cuff or SITS muscle

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10
Q

infraspinatus (insertion)

A

greater tuberosity of humerus; capsule of shoulder joint

rotator cuff or SITS muscle

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11
Q

infraspinatus (nerve)

A

suprascapular nerve

rotator cuff or SITS muscle

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12
Q

infraspinatus (action)

A

laterally rotates arm and stabilizes shoulder joint

rotator cuff or SITS muscle

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13
Q

teres major (origin)

A

lower third of lateral border of scapula

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13
Q

teres major (insertion)

A

medial lip of bicipital groove of humerus

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14
Q

teres major (nerve)

A

lower subscapular nerve

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14
Q

teres major (action)

A

adducts and medially rotates arm; stabilizes shoulder joint

15
Q

teres minor (origin)

A

upper two-thirds of lateral border of scapula

rotator cuff or SITS muscle

16
Q

teres minor (insertion)

A

greater tuberosity of humerus; capsule of shoulder joint

rotator cuff or SITS muscle

17
Q

teres minor (nerve)

A

axillary nerve

rotator cuff or SITS muscle

18
Q

teres minor (action)

A

laterally rotates arm and stabilizes shoulder joint

rotator cuff or SITS muscle

19
Q

subscapularis (origin)

A

subscapular fossa

rotator cuff or SITS muscle

20
Q

subscapularis (insertion)

A

lesser tuberosity of humerus

rotator cuff or SITS muscle

21
Q

subscapularis (nerve)

A

upper and lower subscapular nerves

rotator cuff or SITS muscle

22
Q

subscapularis (action)

A

medially rotates arm and stabilizes shoulder joint

rotator cuff or SITS muscle