Extrinsic Muscles

Question 1

What are the two main divisions of the extrinsic muscles of the superficial human back?

Answer 1

Superficial and immediate

Question 2

Which muscle is considered a superficial extrinsic muscle of the back?

Answer 2

Trapezius

Question 3

True or False: The latissimus dorsi is classified as an immediate extrinsic muscle.

Answer 3

False

Question 4

Fill in the blank: The _____ muscle assists in the elevation of the shoulder.

Answer 4

Trapezius

Question 5

What function does the rhomboid major serve?

Answer 5

Retracts the scapula

Question 6

Which muscle is primarily responsible for the adduction of the arm?

Answer 6

Latissimus dorsi

Question 7

Multiple choice: Which of the following is NOT a superficial extrinsic muscle? A) Trapezius B) Latissimus dorsi C) Serratus posterior superior

Answer 7

C) Serratus posterior superior

Question 8

What are the primary actions of the levator scapulae muscle?

Answer 8

Elevates the scapula and assists in its downward rotation

Question 9

True or False: The serratus posterior inferior is considered an immediate extrinsic muscle.

Answer 9

True

Question 10

Name one function of the superficial extrinsic muscles.

Answer 10

To facilitate movements of the upper limb

Question 11

Which muscle is involved in the extension and medial rotation of the arm?

Answer 11

Latissimus dorsi

Question 12

Fill in the blank: The _____ muscle is located deep to the trapezius and is responsible for retracting the scapula.

Answer 12

Rhomboid major

Question 13

Multiple choice: Which muscle aids in forced expiration? A) Latissimus dorsi B) Serratus posterior superior C) Serratus posterior inferior

Answer 13

C) Serratus posterior inferior

Question 14

What is the role of the trapezius muscle in shoulder movement?

Answer 14

It elevates, retracts, and rotates the scapula.

Question 15

True or False: The immediate extrinsic muscles of the back are primarily involved in movements of the spine.

Answer 15

False

Question 16

Which muscle is located between the spine and the scapula?

Answer 16

Rhomboid major

Question 17

What is the primary action of the serratus posterior superior?

Answer 17

Assists with respiration and proprioception
Elevates the ribs

Question 18

Multiple choice: Which muscle is involved in the downward rotation of the scapula? A) Trapezius B) Levator scapulae C) Rhomboid minor

Answer 18

C) Rhomboid minor

Question 19

Fill in the blank: The _____ muscle assists in the retraction of the scapula along with the rhomboids.

Answer 19

Middle trapezius

Question 20

What is the common innervation for the superficial extrinsic muscles?

Answer 20

Ventral rami of spine C3-C8
Accessory nerve (CN XI) for trapezius

Question 21

True or False: The function of the immediate extrinsic muscles is to stabilize the spine.

Answer 21

True

Question 22

Identify one muscle that is part of the immediate extrinsic group.

Answer 22

Serratus posterior superior

Question 23

What is the primary role of the latissimus dorsi in relation to the shoulder joint?

Answer 23

It extends, adducts, and medially rotates the shoulder.

Question 24

Multiple choice: Which muscle is primarily responsible for scapular elevation? A) Rhomboid major B) Trapezius C) Serratus posterior inferior

Answer 24

B) Trapezius

Question 25

Fill in the blank: The _____ muscle is located superior to the latissimus dorsi.

Answer 25

Trapezius

Question 26

What action does the serratus posterior inferior perform?

Answer 26

Depresses the ribs

Question 27

True or False: The rhomboid minor is larger than the rhomboid major.

Answer 27

False

Question 28

What is the innervation of axioappendicular muscles?

Answer 28

Ventral rami of the spinal nn C3 - C8 (Assessory nerve CN XI for trapezius)

Question 29

What muscle in the exception to ventral rami innveration of the spinal nn?

Answer 29

Trapezius

Question 30

What four muscles are axioappendicular?

Answer 30

Trapezius, Latissimus Dorsi, Levator Scapulae, Rhomboids

Question 31

Define Axioappendicular

Answer 31

Attachment laterally from axial skeleton to appendicular skeleton