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MSK > Rotator Cuff > Flashcards

Rotator Cuff Flashcards

1
Q

What is the rotator cuff?

A

4 intrinsic shoulder muscles that form the musculartendinous cuff around the Glenohumeral joint

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2
Q

What is the pneumonic to remember the 4 muscles that make up the rotator cuff?

A

SITS

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3
Q

Using the pneumonic what are the 4 intrinsic shoulder muscles that make up the rotator cuff?

A

SITS

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

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4
Q

As well as movement, what is the other function of the rotator cuff muscles resting tone?

A

Stabilise the Glenohumeral joint by holding/pulling the large head of the humerus in the glenoid fossa

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5
Q

What bones do all of the muscles of the Rotator cuff originate on and insert on?

A

Origin = Scapula

Insertion = Proximal Humerus

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6
Q

Where do all of the rotator cuff muscles (Supraspinatus, infraspinatus and Teres minor) except Subscapularis insert?

A

Greater tubercle of the Humerus

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7
Q

Where does the Subscapularis (exception) insert?

A

Lesser tubercle of the humerus

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8
Q

Which of the rotator cuff muscles is superior to the Glenohumeral joint?

A

Supraspinatus

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9
Q

Which of the rotator cuff muscles is inferior to the Glenohumeral joint?

A

Infraspinatus
Teres minor

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10
Q

Which of the rotator cuff muscles is anterior to the Glenohumeral joint?

A

Subscapularis

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11
Q

What are the 2 rotator cuff muscles that are posterior to the Glenohumeral joint and what is their function?

A

Infraspinatus
Teres minor

Lateral rotation of upper limb

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12
Q

What is the rotator cuff muscle that is superior to the Glenohumeral joint and what is its function?

A

Supraspinatus

Initiates abduction

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13
Q

What is the rotator cuff muscle that is anterior to the Glenohumeral joint and what is its function?

A

Subscapularis

Medial rotation of joint

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14
Q

What is the origin of the Supraspinatus?

A

Supraspinous fossa of scapula

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15
Q

What is the innervation of Supraspinatus?

A

Suprascapular nerve

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16
Q

What is the origin of infraspinatus?

A

Infraspinatus fossa of scapula

17
Q

What is the innervation of infraspinatus?

A

Suprascapular nerve

18
Q

What is the origin of Teres minor?

A

Superior part of the lateral border of the scapula

19
Q

What is the innervation of Teres minor?

A

Axillary nerve

19
Q

What is the innervation of Teres minor?

A

Axillary nerve

20
Q

What is the origin of Subscapularis?

A

Subscapular fossa of scapula

21
Q

What is the innervation of Subscapularis?

A

Upper + Lower subscapular nerves

22
Q

What are the 2 rotator cuff muscles that are innervated by the suprascapular nerve?

A

Supraspinatus
Infraspinatus

MSK (36 decks)

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