More Muscles

Question 1

What muscle is located between the ribs and aids in respiration?

Answer 1

Internal intercostals

Internal intercostals assist in forced expiration by depressing the rib cage.

Question 2

Which muscle originates from ribs 1-8 and inserts at the vertebral border of the scapula?

Answer 2

Serratus anterior

Serratus anterior is important for protraction and upward rotation of the scapula.

Question 3

What is the origin of the external oblique muscle?

Answer 3

Ribs 5-12

External oblique plays a role in trunk rotation and lateral flexion.

Question 4

Which muscle action is associated with the internal oblique?

Answer 4

Flexes vertebral column, compresses abdominal wall

The internal oblique also aids in rotation of the trunk.

Question 5

What are the attachments of the rectus abdominis muscle?

Answer 5

Origin: Pubic crest, Pubic symphysis; Insertion: Xiphoid process, Ribs 5-7

Rectus abdominis is crucial for flexing the spine.

Question 6

What is the action of the trapezius muscle?

Answer 6

Elevates scapula, depresses scapula, rotates scapula, adducts scapula

The trapezius also stabilizes and moves the scapula.

Question 7

Fill in the blank: The __________ muscle flexes the lumbar region of the vertebral column.

Answer 7

Trapezius

Trapezius also plays a role in rotating the lumbar region.

Question 8

What is the origin of the internal oblique muscle?

Answer 8

Lumbar fascia, Iliac crest, Inguinal ligament

Internal oblique aids in trunk rotation and lateral flexion.

Question 9

Which muscle is responsible for depressing the rib cage?

Answer 9

Internal intercostals

This muscle is involved in forced expiration.

Question 10

What is the insertion point for the serratus anterior muscle?

Answer 10

Vertebral border of the scapula

Serratus anterior is important for scapular movement.

Question 11

True or False: The external oblique muscle helps in compressing the abdominal wall.

Answer 11

True

External oblique also assists in trunk rotation.

Question 12

Fill in the blank: The rectus abdominis muscle inserts at the __________.

Answer 12

Xiphoid process, Ribs 5-7

Rectus abdominis is critical for flexion of the torso.

Question 13

What is the action of the internal oblique muscle?

Answer 13

Flexes vertebral column, compresses abdominal wall

Internal oblique aids in lateral flexion and rotation.

Question 14

What are the origins of the trapezius muscle?

Answer 14

Occipital bone, Spinous processes of C7-T12

Trapezius is involved in the movement and stabilization of the scapula.