091 Supraspinatus, Infraspinatus, and Teres Minor

091 Supraspinatus, Infraspinatus, and Teres Minor

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Interactive Video

Biology

University

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Leslie Samuel introduces three intrinsic shoulder muscles: supraspinatus, infraspinatus, and Terry's minor. The video details their origins, insertions, and functions. Supraspinatus originates from the supraspinous fossa and initiates abduction of the humerus. Infraspinatus originates from the infraspinous fossa and causes external rotation. Terry's minor originates from the lateral border of the scapula, contributing to external rotation and adduction. The video concludes with a review of these muscles' roles in shoulder movement.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following muscles is NOT discussed in the video?

Teres Minor

Infraspinatus

Supraspinatus

Teres Major

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary action of the supraspinatus muscle?

Flexion of the humerus

Initiation of abduction of the humerus

External rotation of the humerus

Adduction of the humerus

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where does the supraspinatus muscle insert?

Lower facet of the greater tubercle

Superior facet of the greater tubercle

Middle facet of the greater tubercle

Lesser tubercle

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main function of the infraspinatus muscle?

Flexion of the humerus

Internal rotation of the humerus

External rotation of the humerus

Abduction of the humerus

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

From where does the infraspinatus muscle originate?

Lateral border of the scapula

Infraspinous fossa

Supraspinous fossa

Acromion

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What additional action does the teres minor muscle assist with besides external rotation?

Abduction of the humerus

Adduction of the humerus

Flexion of the humerus

Extension of the humerus

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where does the teres minor muscle insert?

Lower facet of the greater tubercle

Lesser tubercle

Middle facet of the greater tubercle

Superior facet of the greater tubercle