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Nerve Supply of Digastric Muscle
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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?

    <p>When its fibers mix with those of other muscles</p> Signup and view all the answers

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

    <p>The insertion muscle runs deep to the mylohyoid muscle</p> Signup and view all the answers

    Which muscle has two bellies?

    <p>Digastric</p> Signup and view all the answers

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

    <p>Medially</p> Signup and view all the answers

    Which of the following structures is not a muscle?

    <p>Parotid</p> Signup and view all the answers

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

    <p>Facial nerve</p> Signup and view all the answers

    What is the relationship between the stylohyoid and the digastric?

    <p>They are two separate muscles</p> Signup and view all the answers

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

    <p>Mandibular division of the trigeminal nerve</p> Signup and view all the answers

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

    <p>Vagus nerve</p> Signup and view all the answers

    Which belly of the digastric is mentioned alongside the stylohyoid?

    <p>Posterior belly</p> Signup and view all the answers

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

    <p>The nerve to the mylohyoid is a branch of the trigeminal nerve</p> Signup and view all the answers

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

    <p>Anterior belly</p> Signup and view all the answers

    Which muscle is located laterally to the gland?

    <p>Mylohyoid</p> Signup and view all the answers

    What is the medial relation of the gland?

    <p>Hyoglossus and styloglossus</p> Signup and view all the answers

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

    <p>Masseter</p> Signup and view all the answers

    What is the lateral part of the gland related to?

    <p>Mylohyoid muscle and superficial part of the gland</p> Signup and view all the answers

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

    <p>Hyoglossus muscle</p> Signup and view all the answers

    Which bony structure is related to the gland laterally?

    <p>Mandible</p> Signup and view all the answers

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

    <p>Laterally</p> Signup and view all the answers

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

    <p>On the medial surface</p> Signup and view all the answers

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

    <p>Mylohyoid muscle</p> Signup and view all the answers

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

    <p>The gland is related laterally to the sublingual fossa</p> 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.

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