Muscles of Mastication Quiz

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Questions and Answers

What is the primary function of the muscles of mastication?

Controlling facial expressions
Facilitating breathing movements
Enabling jaw movements (correct)
Supporting cranial stability

From which pharyngeal arch do the muscles of mastication develop?

Fourth pharyngeal arch
Second pharyngeal arch
Third pharyngeal arch
First pharyngeal arch (correct)

Which nerve is responsible for the innervation of the muscles of mastication?

Glossopharyngeal nerve (CN IX)
Facial nerve (CN VII)
Trigeminal nerve (CN V) (correct)
Vagus nerve (CN X)

What characteristic do all the muscles of mastication share?

<p>They are bilateral structures (B)</p> Signup and view all the answers

What role do the muscles of mastication play in the human body?

<p>Facilitating voluntary chewing movements (D)</p> Signup and view all the answers

Flashcards

Muscles of Mastication

The muscles involved in chewing, responsible for jaw movements.

Temporomandibular Joint (TMJ)

The joint between the jawbone (mandible) and the skull, allowing for opening and closing of the mouth.

First Pharyngeal Arch

The first pharyngeal arch (also called the mandibular arch) is a structure in the developing embryo that contributes to the formation of the face and jaw.

Trigeminal Nerve (CN V)

The fifth cranial nerve, responsible for sensation in the face and motor control of the jaw.

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Mandibular Nerve

A branch of the trigeminal nerve that provides motor innervation to the muscles of mastication.

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Study Notes

Muscles of Mastication

The muscles of mastication control jaw movements (temporomandibular joint).
Four muscles are involved in mastication.
These muscles originate from the first pharyngeal arch.
Therefore, they receive innervation from a branch of the trigeminal nerve, the mandibular nerve.
All muscles of mastication are bilateral structures.