Nerve Supply of Digastric Muscle

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Questions and Answers

What is the shape of the insertion muscle?

Circular

Oval

Triangular

Quadrilateral (correct)

Where does the insertion muscle run?

Medial to the mylohyoid muscle

Downward superficial to the mylohyoid muscle

Lateral to the mylohyoid muscle

Upward deep to the mylohyoid muscle (correct)

What happens to the fibers of the insertion muscle at the end?

They split into smaller fibers

They terminate abruptly

They merge with fibers of other tongue muscles (correct)

They branch out to other muscles

Where does the insertion muscle eventually end?

When its fibers mix with those of other muscles Signup and view all the answers

What is the relationship between the insertion muscle and the mylohyoid muscle?

The insertion muscle runs deep to the mylohyoid muscle Signup and view all the answers

Which muscle has two bellies?

Digastric Signup and view all the answers

What is the location of the nerves relative to the mentioned structures?

Medially Signup and view all the answers

Which of the following structures is not a muscle?

Parotid Signup and view all the answers

Which nerve is responsible for the innervation of the posterior belly of the digastric muscle?

Facial nerve Signup and view all the answers

What is the relationship between the stylohyoid and the digastric?

They are two separate muscles Signup and view all the answers

What is the source of the nerve that supplies the anterior belly of the digastric muscle?

Mandibular division of the trigeminal nerve Signup and view all the answers

Which of the following nerves is NOT involved in the innervation of the digastric muscle?

Vagus nerve Signup and view all the answers

Which belly of the digastric is mentioned alongside the stylohyoid?

Posterior belly Signup and view all the answers

What is the relationship between the nerve to the mylohyoid and the trigeminal nerve?

The nerve to the mylohyoid is a branch of the trigeminal nerve Signup and view all the answers

Which belly of the digastric muscle receives innervation from the mandibular division of the trigeminal nerve?

Anterior belly Signup and view all the answers

Which muscle is located laterally to the gland?

Mylohyoid Signup and view all the answers

What is the medial relation of the gland?

Hyoglossus and styloglossus Signup and view all the answers

Which of the following muscles is NOT related to the gland?

Masseter Signup and view all the answers

What is the lateral part of the gland related to?

Mylohyoid muscle and superficial part of the gland Signup and view all the answers

Which of the following is NOT a lateral relation of the gland?

Hyoglossus muscle Signup and view all the answers

Which bony structure is related to the gland laterally?

Mandible Signup and view all the answers

In which direction is the gland related to the sublingual fossa?

Laterally Signup and view all the answers

What is the location of the sublingual fossa in relation to the mandible?

On the medial surface Signup and view all the answers

Which of the following structures is NOT directly related to the gland?

Mylohyoid muscle Signup and view all the answers

What is the anatomical relationship between the gland and the sublingual fossa?

The gland is related laterally to the sublingual fossa Signup and view all the answers

Study Notes

Nerve Supply

Posterior belly of the digastric muscle is supplied by the facial nerve.
Anterior belly of the digastric muscle is supplied by the nerve to the mylohyoid, which is a branch of the mandibular division of the trigeminal nerve.

Muscle Insertion

The digastric muscle is quadrilateral and runs upward deep to the mylohyoid muscle.
It enters the side of the tongue and ends when its fibers mix with those of other muscles of the tongue.

Relations of the Anterior Belly of the Digastric

Medially: related to the hyoglossus and styloglossus nerves.
Laterally: related to the mylohyoid muscle and the superficial part of the gland.

Relations of the Parotid Gland

Medially: related to the nerves (including the hyoglossus and styloglossus).
Laterally: related to the sublingual fossa of the medial surface of the mandible.

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Description

This quiz covers the nerve supply of the digastric muscle, including the posterior and anterior belly.