Anatomy of Mandibular Nerve Quiz

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Questions and Answers

What is the course of the meningeal nerves?

  • They enter the cranial cavity through the foramen spinosum (correct)
  • They exit the cranial cavity through the foramen spinosum
  • They enter the infratemporal fossa through the foramen ovale
  • They exit the infratemporal fossa through the foramen lacerum

Which muscle is innervated by the nerve released opposite the temporomandibular joint?

  • Medial pterygoid muscle
  • Temporalis muscle
  • Lateral pterygoid muscle
  • Masseter muscle (correct)

What is the effect of compressing the motor branch of the mandibular nerve?

  • Neuralgia or pain in the skin and mucous membrane of the cheeks
  • Loss of sensation in the skin and mucous membrane of the cheeks
  • Paralysis of the facial muscles
  • Weakness or paresis in the muscles of mastication (correct)

What is the significance of the proximity of the connection between the submandibular canal and the lingual nerve?

<p>In tract infection and surgery (D)</p> Signup and view all the answers

What is the function of the buccal nerve?

<p>It passes between the buccinator muscle and the mucous membrane of the cheeks, providing sensory function (A)</p> Signup and view all the answers

What is a possible consequence of damaging the lingual nerve?

<p>Sensory loss on the anterior part of the tongue (C)</p> Signup and view all the answers

What is the pathway of the parasympathetic nerve?

<p>Superior salivatory nucleus, lingual nerve, submandibular ganglion, submandibular gland (A)</p> Signup and view all the answers

What is the location of the main trunk of the mandibular nerve?

<p>In the infratemporal fossa (D)</p> Signup and view all the answers

How many branches does the anterior division of the mandibular nerve have?

<p>4 (A)</p> Signup and view all the answers

What is a possible cause of ear pain?

<p>TMJ disease or swelling of the parotid gland (A)</p> Signup and view all the answers

What is the effect of compressing the sensory branch of the mandibular nerve?

<p>Neuralgia or pain in the skin and mucous membrane of the cheeks (D)</p> Signup and view all the answers

What is a clinical test for the mandibular nerve?

<p>Sensory testing using sharp or blunt tools (A)</p> Signup and view all the answers

What is the branch that supplies the temporalis muscle?

<p>Anterior division of the mandibular nerve (A)</p> Signup and view all the answers

What accompanies the superficial temporal artery at the temple?

<p>Auriculotemporal nerve (A)</p> Signup and view all the answers

What is the main pharyngeal nerve arch?

<p>Mandibular nerve (D)</p> Signup and view all the answers

Which part of the tongue is innervated by the mandibular nerve?

<p>Anterior 2/3 of the tongue (B)</p> Signup and view all the answers

What is the origin of the sensory root of the mandibular nerve?

<p>Semilunar ganglion (A)</p> Signup and view all the answers

What is the consequence of trauma to the mandible?

<p>Sensory loss distal to the lesion (A)</p> Signup and view all the answers

What is the purpose of local anesthesia of the inferior alveolar nerve?

<p>Dental procedures (D)</p> Signup and view all the answers

What is the relationship between the submandibular canal and the lingual nerve?

<p>Close connection (B)</p> Signup and view all the answers

What is the function of the motor root of the mandibular nerve?

<p>Motor function (B)</p> Signup and view all the answers

What is the origin of the mandibular nerve?

<p>Trigeminal nerve (D)</p> Signup and view all the answers

What is the main function of the motor root of the mandibular nerve?

<p>Controlling mastication muscles and complex jaw movements (B)</p> Signup and view all the answers

What is the origin of the sensory root of the mandibular nerve?

<p>The semilunar ganglion (C)</p> Signup and view all the answers

Which of the following structures is NOT innervated by the mandibular nerve?

<p>Teeth and gums of the maxilla (C)</p> Signup and view all the answers

What is the location of the mandibular nerve in relation to the hyoglossus and genioglossus muscles?

<p>Deep to the hyoglossus and genioglossus muscles (D)</p> Signup and view all the answers

What is the course of the mandibular nerve after it arises from the lateral pterygoid muscle?

<p>It runs downward and forward along the ramus of the mandible (A)</p> Signup and view all the answers

What is the main function of the sensory fibers of the mandibular nerve?

<p>Transmitting sensory information from the skin and mucous membranes (D)</p> Signup and view all the answers

What is the location of the mandibular nerve in relation to the mandible?

<p>Below the mandible, behind the three molars (A)</p> Signup and view all the answers

What is the significance of the mandibular nerve in relation to the membranous neurocranium?

<p>It innervates the meninges in the membranous neurocranium (A)</p> Signup and view all the answers

What is the main function of the trigeminal nerve?

<p>To transmit somatosensory information from the face (A)</p> Signup and view all the answers

How many parts does the trigeminal sensory nucleus have?

<p>Three parts, each for a different modality (D)</p> Signup and view all the answers

What is the function of the mesencephalic nucleus?

<p>To integrate sensory information from the spinal tracts and nuclei (A)</p> Signup and view all the answers

Which nerve is responsible for transmitting sensory information from the lower teeth?

<p>Inferior alveolar nerve (C)</p> Signup and view all the answers

What is the name of the structure that blocks the success of the inferior alveolar nerve?

<p>Masseter muscle (B)</p> Signup and view all the answers

What is the name of the artery that is often biopsied in the parotid gland?

<p>Superficial temporal artery (B)</p> Signup and view all the answers

What is the name of the space that can be improved by biopsies?

<p>Pterygomandibular space (C)</p> Signup and view all the answers

What is the name of the tumor that can cause facial pain in the parotid gland?

<p>Calcified pleomorphic adenoma (A)</p> Signup and view all the answers

Flashcards

Mandibular nerve function

The largest branch of the trigeminal nerve, providing sensory and motor functions to the lower part of the face, teeth, muscles of mastication, etc.

Mandibular nerve roots

Sensory from the trigeminal ganglion and motor from the motor nucleus.

Masseteric nerve

Branch of mandibular nerve; supplies masseter muscle.

Medial pterygoid nerve

Branch of mandibular nerve; supplies medial pterygoid muscle.

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Lateral pterygoid nerve

Branch of mandibular nerve; supplies lateral pterygoid muscle.

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Buccal nerve

Branch of mandibular nerve; sensory function in the cheek area.

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Mandibular nerve entrapment

Compression of the mandibular nerve causing paresis or sensory problems.

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Mandibular nerve paresis

Weakness in muscles supplied by the mandibular nerve.

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Mandibular nerve neuralgia

Pain along the branches of the mandibular nerve.

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Lingual nerve damage

Sensory problems in the anterior part of tongue from damage.

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Inferior alveolar nerve block

Nerve block used for tooth procedures

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TMJ disease

Temporomandibular joint disorder

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Submandibular stones

Stones formed in the submandibular salivary gland.

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Inferior alveolar nerve

Branch with sensory function and innervation of lower teeth, gums.

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Sensory testing

Assessing patient's ability to feel different stimuli.

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Clinical testing

Testing of nerve, muscle function, or sensations.

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Sensory loss

Inability to detect sensation or respond to stimuli.

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Submandibular canal

Passageway in the neck.

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Study Notes

Functional Anatomy of Mandibular Nerve

  • The mandibular nerve is the largest branch of the trigeminal nerve, innervating the mandibular teeth, gums, skin of the temporal region, ear, lower lip, lower part of the face, muscles of mastication, and mucous membrane of the anterior 2/3 of the tongue.

  • The mandibular nerve has a mixture of sensory and motor nerves and motor and sensory functions, including the face, cheeks, temples, oral cavity, teeth and gums, nasal cavity and sinuses, and temporomandibular joints and muscles.

  • The sensory and motor fibers in the mandibular nerve originate from two roots: the sensory root, which originates from the semilunar ganglion, and the motor root, which originates from the motor nucleus.

Branches of the Mandibular Nerve

  • The mandibular nerve has four sub-branches:
  • Masseteric nerve: supplies the masseter muscle
  • Medial pterygoid nerve: supplies the medial pterygoid muscle
  • Lateral pterygoid nerve: supplies the lateral pterygoid muscle
  • Buccal nerve: has a sensory function, passing between the mandible and the medial pterygoid muscle

Clinical Consequences of Mandibular Nerve Entrapment

  • Compression of the motor branch of the mandibular nerve can cause paresis or weakness in the muscles it innervates.
  • Compression of the sensory branch can trigger neuralgia or sensory loss.

Clinical Notes

  • Careless extraction of teeth can cause damage to the lingual nerve, inferior alveolar nerve block, and TMJ disease or swelling of the parotid glands, which can cause ear pain due to referred pain.

  • Clinical testing can be in the form of sensory testing or sensory testing in the form of asking the patient and using sharp or blunt tools.

Anatomical Relevance

  • The proximity of the connection between the submandibular canal and the lingual nerve is important in tract infection and surgery.
  • Submandibular stones are not uncommon due to mucus secretion.
  • Damage to the lingual nerve can cause sensory loss, both somatic and taste, on the anterior part of the tongue.

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