The Rotator Cuff Muscles

Question 1

The rotator cuff muscles are also known as?

Answer 1

THE SITS MUSCLES

SUPRASPINATUS
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INFRASPINATUS
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TERES MINOR
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SUBCAPULARIS

Question 2

The rotator cuff muscles support and stabilize the __ -__ ________ and help to control its movements.

Answer 2

G - H JOINT

Question 3

Medial attachment:
SUPRASPINOUS FOSSA

Lateral attachment:
SUPERIOR FACET OF THE GREATER TUBERCLE OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Actions:
ABDUCTION
STABILIZES G - H JOINT BY ‘TUCKING’ THE HEAD OF THE HUMERUS UP INTO THE GLENOID FOSSA

Answer 3

SUPRASPINATUS

Question 4

Medial attachment:
INFRASPINOUS FOSSA

Lateral attachment:
MIDDLE FACET OF THE GREATER TUBERCLE OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Action:
G - H EXTERNAL ROTATION

Answer 4

INFRASPINATUS

Question 5

Medial attachment:
LATERAL MIDDLE BORDER OF THE SCAPULA (BETWEEN TRICEPS AND TERES MAJOR)

Lateral attachment:
INFERIOR FACET OF THE GREATER TUBERCLE OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Action:
G - H EXTERNAL ROTATION

Answer 5

TERES MINOR

Question 6

Medial attachment:
SUBSCAPULAR FOSSA

Lateral attachment:
LESSER TUBERCLE (MEDIAL LIP OF THE BICIPITAL GROOVE) OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Actions:
G - H INTERNAL ROTATION

Answer 6

SUBCAPULARIS

Question 7

Medial attachment:
POSTERIOR SURFACE OF THE INFERIOR ANGLE OF THE SCAPULA

Lateral attachment:
MEDIAL LIP OF THE BICIPITAL GROOVE

Actions:
G - H INTERNAL ROTATION
G - H EXTENSION
G - H ADDUCTION

Answer 7

TERES MAJOR

Question 8

What are the 2 actions of supraspinatus

Answer 8

ABDUCTION

STABILIZES G - H JOINT BY ‘TUCKING’ THE HEAD OF THE HUMERUS UP INTO THE GLENOID FOSSA

Question 9

What is the medial attachment for supraspinatus?

Answer 9

SUPRASPINOUS FOSSA

Question 10

What is the lateral attachment for supraspinatus?

Answer 10

SUPERIOR FACET OF THE GREATER TUBERCLE OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Question 11

What is the only action performed by infraspinatus, teres minor, and subcapularis?

Answer 11

G - H EXTERNAL ROTATION

Question 12

What is the medial attachment for infraspinatus?

Answer 12

INFRASPINOUS FOSSA

Question 13

What is the lateral attachment for infraspinatus?

Answer 13

MIDDLE FACET OF THE GREATER TUBERCLE OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Question 14

What is the medial attachment for teres minor?

Answer 14

LATERAL MIDDLE BORDER OF THE SCAPULA (BETWEEN TRICEPS AND TERES MAJOR)

Question 15

What is the lateral attachment for teres minor

Answer 15

INFERIOR FACET OF THE GREATER TUBERCLE OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Question 16

What is the medial attachment for subcapularis?

Answer 16

SUBSCAPULAR FOSSA

Question 17

What is the lateral attachment for subcapularis?

Answer 17

LESSER TUBERCLE (MEDIAL LIP OF THE BICIPITAL GROOVE) OF THE HUMERUS (ALSO THE G - H JOINT CAPSULE)

Question 18

What are the 3 G - H joint actions of teres major?

Answer 18

G - H INTERNAL ROTATION
G - H EXTENSION
G - H ADDUCTION

Question 19

What is the medial attachment for teres major?

Answer 19

POSTERIOR SURFACE OF THE INFERIOR ANGLE OF THE SCAPULA

Question 20

What is the lateral attachment for teres major?

Answer 20

MEDIAL LIP OF THE BICIPITAL GROOVE

Question 21

Name the 3 muscles which perform G - H external rotation?

Answer 21

INFRASPINATUS
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TERES MINOR
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SUBCAPULARIS