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Gross Anatomy > Scapulohumeral (Intrinsic Shoulder) Muscles > Flashcards

Scapulohumeral (Intrinsic Shoulder) Muscles Flashcards

1
Q

Deltoid Origin-3

A
  • Lateral 1/3 of clavicle
  • Acromion
  • Spine of scapula
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2
Q

Deltoid Insertion

A

Deltoid tuberosity of humerus

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3
Q

Deltoid Innervation

A

Axillary nerve (C5, C6)

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4
Q

Deltoid Action-3

A

Anterior-Flexes and medially rotates arm
Middle-Abducts arm
Posterior-Extends and laterally rotates arm

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5
Q

Supraspinatous Origin

A

Supraspinous fossa of scapula

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6
Q

Supraspinatous Insertion

A

Superior facet of greater tubercle of humerus

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7
Q

Supraspinatous Innervation

A

Suprascapular nerve (C4, C5, C6)

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8
Q

Supraspinatous Action

A

Initiates and assists deltoid in abduction of arm

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9
Q

Infraspinatous Origin

A

Infraspinous fossa of scapula

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10
Q

Infraspinatous Insertion

A

Middle facet of greater tubercle of humerus

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11
Q

Infraspinatous Innervation

A

Suprascapular nerve (C5, C6)

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12
Q

Infraspinatous Action

A

Laterally rotate arm

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13
Q

Teres minor Origin

A

Middle part of lateral border of scapula

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14
Q

Teres minor Insertion

A

Inferior facet of greater tubercle of humerus

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15
Q

Teres minor Innervation

A

Axillary nerve (C5, C6)

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16
Q

Teres minor Action

A

Laterally rotate arm

17
Q

Subscapularis Origin

A

Subscapular fossa

18
Q

Subscapularis Insertion

A

Lesser tubercle of humerus

19
Q

Subscapularis Innervation

A

Upper and lower subscapular nerves (C5, C6, C7)

20
Q

Subscapularis Action

A

Medially rotates and adducts arm

21
Q

Teres Major Origin

A

Posterior surface of inferior angle of scapula

22
Q

Rotator cuff muscles collective action

A

Their primary function during all movements of the shoulder is to hold the humeral head in the glenoid cavity

23
Q

Teres Major Insertion

A

Medial lip of interubercular groove of humerus

24
Q

Teres Major Innervation

A

Lower subscapular nerve (C5, C6)

25
Q

Teres Major Action

A

Adducts and medially rotates arm

Gross Anatomy (22 decks)

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