Podcast
Questions and Answers
What is the shape of the insertion muscle?
What is the shape of the insertion muscle?
- Circular
- Oval
- Triangular
- Quadrilateral (correct)
Where does the insertion muscle run?
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?
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?
Where does the insertion muscle eventually end?
What is the relationship between the insertion muscle and the mylohyoid muscle?
What is the relationship between the insertion muscle and the mylohyoid muscle?
Which muscle has two bellies?
Which muscle has two bellies?
What is the location of the nerves relative to the mentioned structures?
What is the location of the nerves relative to the mentioned structures?
Which of the following structures is not a muscle?
Which of the following structures is not a muscle?
Which nerve is responsible for the innervation of the posterior belly of the digastric muscle?
Which nerve is responsible for the innervation of the posterior belly of the digastric muscle?
What is the relationship between the stylohyoid and the digastric?
What is the relationship between the stylohyoid and the digastric?
What is the source of the nerve that supplies the anterior belly of the digastric muscle?
What is the source of the nerve that supplies the anterior belly of the digastric muscle?
Which of the following nerves is NOT involved in the innervation of the digastric muscle?
Which of the following nerves is NOT involved in the innervation of the digastric muscle?
Which belly of the digastric is mentioned alongside the stylohyoid?
Which belly of the digastric is mentioned alongside the stylohyoid?
What is the relationship between the nerve to the mylohyoid and the trigeminal nerve?
What is the relationship between the nerve to the mylohyoid and the trigeminal nerve?
Which belly of the digastric muscle receives innervation from the mandibular division of the trigeminal nerve?
Which belly of the digastric muscle receives innervation from the mandibular division of the trigeminal nerve?
Which muscle is located laterally to the gland?
Which muscle is located laterally to the gland?
What is the medial relation of the gland?
What is the medial relation of the gland?
Which of the following muscles is NOT related to the gland?
Which of the following muscles is NOT related to the gland?
What is the lateral part of the gland related to?
What is the lateral part of the gland related to?
Which of the following is NOT a lateral relation of the gland?
Which of the following is NOT a lateral relation of the gland?
Which bony structure is related to the gland laterally?
Which bony structure is related to the gland laterally?
In which direction is the gland related to the sublingual fossa?
In which direction is the gland related to the sublingual fossa?
What is the location of the sublingual fossa in relation to the mandible?
What is the location of the sublingual fossa in relation to the mandible?
Which of the following structures is NOT directly related to the gland?
Which of the following structures is NOT directly related to the gland?
What is the anatomical relationship between the gland and the sublingual fossa?
What is the anatomical relationship between the gland and the sublingual fossa?
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.
