Rotator Cuff Muscles Flashcards

1
Q

What is the Origin of Infraspinatus

A

Infraspinous Fossa

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2
Q

What is the Insertion of Infraspinatus

A

Greater Tubercle of Humerus (middle facet)

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3
Q

What is the Action of Infraspinatus

A

Lateral (external) Rotation

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4
Q

What is the Innervation of Infraspinatus

A

Suprascapular Nerve

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5
Q

What is the Location of Teres Minor

A

Lateral/Deep to Infraspinatus

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6
Q

What is the Origin of Teres Minor

A

Lateral Border of Scapula

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7
Q

What is the Insertion of Teres Minor

A

Greater Tubercle of Humerus (inferior facet)

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8
Q

What is the Action of Teres Minor

A

Lateral (external) Rotation of Humerus

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9
Q

What is the Innervation of Teres Minor

A

Axillary Nerve

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10
Q

What are the Origins of Deltoid

A

Anterior - Lateral 1/3 of Clavicle
Middle - Acromion
Posterior - Spine of Scapula

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11
Q

What is the Insertion of Deltoid

A

Deltoid Tuberosity

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12
Q

What are the Actions of Deltoid

A

Anterior - Flexion, Medial Rotation
Middle - Abduction
Posterior - Extension and Lateral Rotation of Humerus

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13
Q

What is the Innervation of Deltoid

A

Axillary Nerve

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14
Q

What is the Origin of Subscapularis

A

Subscapular Fossa

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15
Q

What is the Insertion of Subscapularis

A

Lesser Tubercle of Humerus

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16
Q

What is the Action of Subscapularis

A

Medial (internal) Rotation, Adduction of Humerus

17
Q

What is the Innervation of Subscapularis

A

Upper and Lower Subscapular Nerves

18
Q

What is the Location of Teres Major

A

Inferior to Teres Minor

19
Q

What is the Origin of Teres Major

A

Inferior Angle of Scapula (dorsal surface)

20
Q

What is the Insertion of Teres Major

A

Bicipital Groove (medial lip)

21
Q

What are the Actions of Teres Major

A

Adduction, Medial (internal) Rotation of Humerus, Extension of G/H (with help from Lats)

22
Q

What is the Innveration of Teres Major

A

Lower Subscapular Nerve

23
Q

What is the Origin of Supraspinatus

A

Supraspinous Fossa

24
Q

What is the Insertion of Supraspinatus

A

Greater Tubercle of Humerus (superior facet)

25
Q

What are the Actions of Supraspinatus

A

Abduction of Humerus (1st 15degrees), Synergist - Assists the Deltoid

26
Q

What is the Innervation of Supraspinatus

A

Suprascapular Nerve