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Anatomy Lab > Muscles Week 8 > Flashcards

Muscles Week 8 Flashcards

1
Q

What is the origin of the Teres Minor muscle?

A

Superior lateral border of scapula

The Teres Minor is one of the rotator cuff muscles.

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2
Q

Where does the Teres Minor insert?

A

Greater tubercle of humerus

This insertion allows the muscle to affect shoulder movement.

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3
Q

What action does the Teres Minor perform?

A

Lateral rotation of shoulder

It also stabilizes the glenohumeral joint.

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4
Q

Which nerve innervates the Teres Minor?

A

Axillary nerve

The axillary nerve is crucial for shoulder function.

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5
Q

What is the origin of the Subscapularis muscle?

A

Subscapular fossa of scapula

The Subscapularis is the largest rotator cuff muscle.

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6
Q

Where does the Subscapularis insert?

A

Lesser tubercle of humerus

This insertion point is key for shoulder internal rotation.

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7
Q

What action does the Subscapularis perform?

A

Medial rotation of shoulder

It also stabilizes the glenohumeral joint.

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8
Q

Which nerves innervate the Subscapularis?

A

Upper and lower subscapular nerves

These nerves play a significant role in shoulder mobility.

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9
Q

What is the origin of the supraspinatus?

A

Supraspinous fossa of scapula

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10
Q

What is the insertion of the supraspinatus?

A

Greater tubercle of humerus

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11
Q

What is the action of the supraspinatus?

A

Abduction of shoulder

Stabilizes glenohumeral joint

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12
Q

What is the innervation of the supraspinatus?

A

Suprascapular nerve

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13
Q

What is the origin of the infraspinatus?

A

Infraspinous fossa and inferior portion of spine of scapula

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14
Q

What is the insertion of the infraspinatus?

A

Greater tubercle of humerus

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15
Q

What is the action of the infraspinatus?

A

Lateral rotation of shoulder

Stabilizes glenohumeral joint

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16
Q

What is the innervation of the infraspinatus?

A

Suprascapular nerve

17
Q

What is the origin of the deltoid muscle?

A

Lateral 1/3 of clavicle, acromion, and spine of scapula

18
Q

Where does the deltoid muscle insert?

A

Deltoid tuberosity of humerus

19
Q

What is the primary action of the middle fibers of the deltoid?

A

Abduction of shoulder

20
Q

What actions do the anterior fibers of the deltoid perform?

A

Flexion and horizontal adduction

21
Q

What actions do the posterior fibers of the deltoid perform?

A

Extension and horizontal abduction

22
Q

What is the innervation of the deltoid muscle?

A

Axillary nerve

23
Q

What is the origin of the Levator Scapulae?

A

TPs of C1-C4

24
Q

Where does the Levator Scapulae insert?

A

Medial border of scapula (superior part)

25
Q

What is the action of the Levator Scapulae?

A

Elevation of scapula, extension and lateral flexion of neck

26
Q

What is the innervation of the Levator Scapulae?

A

Dorsal scapular nerve

Anatomy Lab (12 decks)

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