Question 1

Which of the following muscles of facial expression inserts on the orbicularis oris, and compresses the cheeks when blowing air?&#10;A)Buccinator&#10;B)Mentalis&#10;C)Platyma&#10;D)Risorius&#10;E)Zygomaticus major

Accepted Answer

The buccinator muscle inserts on the orbicularis oris and is responsible for compressing the cheeks when blowing air. The other muscles listed have different actions and do not insert on the orbicularis oris.

Question 2

What is the function of medial and lateral excursion, movements of some of the muscles of mastication?&#10;A)To close the mouth during chewing&#10;B)To move the mandible side to side, to help grind food&#10;C)To move the mandible forward&#10;D)To open the mouth during chewing&#10;E)To move the mandible backward

Accepted Answer

Medial (toward midline) and lateral (away from midline) excursion refer to the movement of the mandible (lower jaw) from side to side. This is important for grinding food during chewing. Some of the muscles involved in these movements include the lateral pterygoid, medial pterygoid, and masseter muscles. Choices A, C, D, and E do not accurately describe the function of these movements.

Question 3

Which of the following facial muscles raise(s)the corners of the mouth for smiling and laughing?&#10;A)Buccinator&#10;B)Mentalis and platysma&#10;C)Depressor anguli oris&#10;D)Orbicularis oris&#10;E)Zygomaticus major and minor

Accepted Answer

The zygomaticus major and minor muscles are responsible for raising the corners of the mouth for smiling and laughing. The orbicularis oris muscle is responsible for puckering the lips, while the buccinator muscle helps to keep food in the mouth and plays a role in blowing air out of the mouth. The mentalis and platysma muscles are involved in various facial expressions, but are not specifically responsible for raising the corners of the mouth for smiling and laughing. The depressor anguli oris muscle pulls the corners of the mouth downward, creating a frown.

Question 4

Which of the following facial muscles stretches from the lower portion of the mandible to the fascia of the upper chest, and pulls the angle of the mouth downward during pouting or expression of horror?

A)Orbicularis oculi
B)Platysma
C)Buccinator
D)Orbicularis oris
E)Levator anguli oris

Accepted Answer

The muscle described is the platysma, which stretches from the lower part of the mandible to the fascia of the upper chest. It is responsible for pulling the corners of the mouth downward during pouting or when expressing horror. The other muscles listed are not responsible for this action.

Question 5

Which of the following muscles of facial expression is the only one that closes the eye when blinking?&#10;A)Nasalis&#10;B)Orbicularis oris&#10;C)Risorius&#10;D)Mentalis&#10;E)Orbicularis oculi

Accepted Answer

The orbicularis oculi is the only muscle of facial expression that closes the eye when blinking. The nasalis muscle helps widen the nostrils, the orbicularis oris muscle controls the movement of the lips, the risorius muscle assists in smiling, and the mentalis muscle helps move the lower lip.

Question 6

All of the muscles that move the hyoid bone and larynx are innervated by the facial nerve.

Accepted Answer

The muscles that move the hyoid bone and larynx are innervated by the hypoglossal nerve (cranial nerve XII) and the vagus nerve (cranial nerve X), respectively. The facial nerve (cranial nerve VII) mainly innervates the muscles of facial expression.

Question 7

Which of the following nerves innervates the muscles of mastication?&#10;A)Trigeminal nerve&#10;B)Ansa cervicalis&#10;C)Accessory nerve&#10;D)Hypoglossal nerve&#10;E)Facial nerve

Accepted Answer

The trigeminal nerve (also known as cranial nerve V) innervates the muscles of mastication, including the temporalis, masseter, and lateral and medial pterygoids. The ansa cervicalis innervates the strap muscles of the neck, the accessory nerve innervates the sternocleidomastoid and trapezius muscles, the hypoglossal nerve innervates the muscles of the tongue, and the facial nerve innervates the muscles of facial expression.

Question 8

Which of the following is the only muscle of mastication that depresses and protracts the mandible?&#10;A)Medial pterygoid&#10;B)Buccinator&#10;C)Lateral pterygoid&#10;D)Masseter&#10;E)Termporalis

Accepted Answer

The only muscle of mastication that depresses and protracts the mandible is the lateral pterygoid. The medial pterygoid, masseter, and temporalis muscles are responsible for elevating the mandible during mastication. The buccinator muscle is not a muscle of mastication, but rather is responsible for compressing the cheeks during activities such as blowing or whistling.

Question 9

Which of the following muscle groups contains some muscles that are innervated by the ansa cervicalis?&#10;A)Muscles of mastication&#10;B)Muscles of facial expression&#10;C)Muscles that move the hyoid bone and larynx&#10;D)Muscles that move the head and neck&#10;E)All of these muscle groups contain some muscles that are innervated by the ansa cervicalis.

Accepted Answer

The ansa cervicalis is a nerve loop that innervates muscles that move the hyoid bone and larynx, including the sternohyoid, omohyoid, and thyrohyoid muscles. These muscles are involved in swallowing and speaking. The muscles of mastication are innervated by the trigeminal nerve, the muscles of facial expression are innervated by the facial nerve, and the muscles that move the head and neck are innervated by various nerves including the spinal accessory nerve.

Question 10

Which of the following muscles of the head and neck elevate(s)ribs 1 and 2, and flex(es)and rotate(s)the neck when the first rib is flexed?&#10;A)Sternocleidomastoid&#10;B)Splenius capitis&#10;C)Semispinalis capitis&#10;D)Scalenes&#10;E)The superior portion of the trapezius

Accepted Answer

The scalene muscles, which include the anterior, middle, and posterior scalene muscles, elevate ribs 1 and 2 during forced inhalation and aid in flexing and rotating the neck when the first rib is fixed. None of the other muscles listed are involved in the elevation of ribs 1 and 2. The sternocleidomastoid muscle primarily rotates and laterally flexes the neck, the splenius capitis muscle extends and rotates the head, the semispinalis capitis muscle extends the head and neck, and the superior portion of the trapezius muscle elevates and depresses the scapula.

Question 11

Which of the following muscles elevates the hyoid bone during the swallowing process?&#10;A)Omohyoid&#10;B)Thyrohyoid&#10;C)Mylohyoid&#10;D)Sternohyoid&#10;E)Sternothyroid

Accepted Answer

The answer of Which of the following muscles elevates the...

Question 12

The muscles that move the head are found in the neck.

Accepted Answer

The answer of The muscles that move the head are...

Question 13

Which of the following muscles of the head and neck originates on the sternum and clavicle, and inserts on the mastoid process?&#10;A)Scalenes&#10;B)Trapezius&#10;C)Splenius capitis&#10;D)Sternocleidomastoid&#10;E)Semispinalis capitis

Accepted Answer

The answer of Which of the following muscles of the...

Question 14

Which of the following is NOT true of the masseter muscle?&#10;A)It originates on the zygomatic arch.&#10;B)It is innervated by the facial nerve.&#10;C)It inserts on the lateral portion of the mandible.&#10;D)It closes the jaw by elevating the mandible.&#10;E)All of these are true of the masseter muscle.

Accepted Answer

The answer of Which of the following is NOT true...

Question 15

Which of the following is NOT true of the epicranius muscle?&#10;A)It is considered to be a muscle of mastication.&#10;B)It consists of the frontalis and the occipitalis.&#10;C)Its 2 portions are connected by a large aponeurosis.&#10;D)It acts to raise the eyebrows and retract the scalp.&#10;E)All of these are true of the epicranius muscle.

Accepted Answer

The answer of Which of the following is NOT true...

Question 16

The group of muscles that moves the hyoid bone and larynx helps with the processes of speech and swallowing.

Accepted Answer

The answer of The group of muscles that moves the...

Question 17

The muscles of mastication are all inserted on the maxilla.

Accepted Answer

The answer of The muscles of mastication are all inserted...

Deck 22: Muscles of the Head and Neck