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Advanced Human Dissection > Muscles of the Shoulder > Flashcards

Muscles of the Shoulder Flashcards

1
Q

Deltoid is innervated by

A

axillary nerve

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2
Q

Actions of the deltoid

A
  • flexion and medial rotation of glenohumeral joint
  • abduction of glenohumeral joint
  • extension and lateral rotation of glenohumeral joint
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3
Q

Which muscle is the prime abductor of the arm?

A

deltoid

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4
Q

supraspinatus is innervated by

A

suprascapular nerve

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5
Q

Actions of the supraspinatus

A

initiate abduction of glenohumeral joint

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6
Q

Rotator cuff muscles

A

-supraspinatus
-infraspinatus
-teres minor
subscapularis

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7
Q

Infraspinatus is innervated by

A

suprascapular nerve

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8
Q

Actions of the infraspinatus

A

lateral rotation of glenohumeral joint

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9
Q

Teres minor is innervated by

A

axillary nerve

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10
Q

Actions of the teres minor

A

lateral rotation of glenohumeral joint

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11
Q

Subscapularis is innervated by

A

upper and lower subscapular nerve

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12
Q

actions of the subscapularis

A

medial rotation of glenohumeral joint

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13
Q

Teres major is innervated by

A

lower subscapular nerve

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14
Q

actions of the teres major

A

adduction of glenohumeral joint and medial rotation of glenohumeral joint

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15
Q

Latissimus dorsi is innervated by

A

thoracodorsal nerve

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16
Q

actions of the latissimus dorsi

A
  • medial rotation of glenohumeral joint
  • adduction of glenohumeral joint
  • extension of glenohumeral joint
17
Q

The ______ joint is the most mobile joint in the body, and with this high level of mobility, there is decreased stability.

A

glenohumeral

18
Q

____ ______ tendons are the main source of stability for the glenohumeral joint.

A

rotator cuff (dynamic stabilizer)

19
Q

Serratus anterior is innervated by

A

long thoracic nerve

20
Q

Actions of serratus anterior

A

abducts and rotates the scapula upward

21
Q

A winged scapula commonly occurs after an injury to the long thoracic nerve, which runs on the superficial surface of _____ _____.

A

serratus anterior

Advanced Human Dissection (11 decks)

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