Question 1

Which muscle is primarily responsible for closing and pursing the lips, often referred to as the 'kissing muscle'?

Accepted Answer

Orbicularis oris

Question 2

A patient presents with difficulty elevating their mandible during chewing. Which muscle is most likely impaired?

Accepted Answer

Masseter

Question 3

Which muscle originates from the zygomatic bone and is responsible for elevating the upper lip?

Accepted Answer

Zygomaticus minor

Question 4

During trumpet playing, which muscle is most active in compressing the cheek?

Accepted Answer

Buccinator

Question 5

Which muscle is responsible for wrinkling the eyebrows and originates from the frontal bone?

Accepted Answer

Corrugator supercilii

Question 6

If a patient cannot depress their mandible and elevate their larynx, which muscle is most likely affected?

Accepted Answer

Digastric (Posterior and Anterior)

Question 7

Which muscle group is responsible for both flexing the vertebral column and depressing the ribs?

Accepted Answer

Rectus abdominis

Question 8

A patient with paralysis of the sternocleidomastoid muscle would have difficulty performing which movement?

Accepted Answer

Flexion of the neck

Question 9

Which muscle originates from the superior thorax and acts to tense the skin of the neck and depress the mandible?

Accepted Answer

Platysma

Question 10

Which muscle is involved in lateral flexion and extension of the vertebral column?

Accepted Answer

Longissimus

Question 11

If the external intercostal muscles contract, what is the resulting action?

Accepted Answer

Elevation of ribs

Question 12

Which muscle originates from the temporal bone and inserts on the coronoid process of the mandible, elevating the mandible during mastication?

Accepted Answer

Temporalis

Question 13

A patient is unable to move the jaw side-to-side. Which muscle is most likely impaired?

Accepted Answer

Pterygoids (Medial and Lateral)

Question 14

Which abdominal muscle originates from the lumbar fascia, ribs 7-12, and iliac crest, and acts to compress the abdomen?

Accepted Answer

Transversus abdominis

Question 15

Which muscle is responsible for closing the eyes and originates from the medial margin of the orbit?

Accepted Answer

Orbicularis oculi

Question 16

If a patient has difficulty depressing the ribs during forced expiration, which muscle group is most likely affected?

Accepted Answer

Internal intercostals

Question 17

Which muscle originates from the fascia around the parotid salivary gland and acts to draw the corners of the mouth to the side?

Accepted Answer

Risorius

Question 18

Which muscle group is responsible for compressing the abdomen and depressing the ribs, and originates from the outer surface of lower eight ribs?

Accepted Answer

External oblique

Question 19

A patient with injury to the scalenes would have difficulty performing which action?

Accepted Answer

Elevation of ribs 1 and 2

Question 20

Which muscle originates from the mandible and inserts on the hyoid bone, acting to depress the mandible?

Accepted Answer

Mylohyoid

Muscle Groups of the Head, Neck, Thorax, and Abdomen: Origins, Insertions, and Actions

Study Guide - Practice Questions