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Questions and Answers
The buccal nerve, a branch of the mandibular nerve's anterior division, exclusively conveys motor innervation to the buccinator muscle.
The buccal nerve, a branch of the mandibular nerve's anterior division, exclusively conveys motor innervation to the buccinator muscle.
False (B)
The auriculotemporal nerve originates from the anterior division of the mandibular nerve.
The auriculotemporal nerve originates from the anterior division of the mandibular nerve.
False (B)
The auriculotemporal nerve receives postganglionic secretomotor fibres from the submandibular ganglion for parotid gland innervation.
The auriculotemporal nerve receives postganglionic secretomotor fibres from the submandibular ganglion for parotid gland innervation.
False (B)
The inferior alveolar nerve emerges above the superior head of the lateral pterygoid muscle.
The inferior alveolar nerve emerges above the superior head of the lateral pterygoid muscle.
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The mylohyoid nerve, after branching from the inferior alveolar nerve, passes superficially to the sphenomandibular ligament.
The mylohyoid nerve, after branching from the inferior alveolar nerve, passes superficially to the sphenomandibular ligament.
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The inferior alveolar nerve supplies the three molar teeth and the two premolar teeth, extending anteriorly to include the incisor teeth.
The inferior alveolar nerve supplies the three molar teeth and the two premolar teeth, extending anteriorly to include the incisor teeth.
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The lingual nerve is positioned laterally to the medial pterygoid muscle as it descends.
The lingual nerve is positioned laterally to the medial pterygoid muscle as it descends.
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The chorda tympani nerve joins the lingual nerve approximately 2 centimeters above the base of the skull.
The chorda tympani nerve joins the lingual nerve approximately 2 centimeters above the base of the skull.
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The otic ganglion is characterized as a large, pea-like structure readily identifiable in anatomical dissections.
The otic ganglion is characterized as a large, pea-like structure readily identifiable in anatomical dissections.
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The lesser petrosal branch of the facial nerve carries parasympathetic secretomotor fibres to the otic ganglion.
The lesser petrosal branch of the facial nerve carries parasympathetic secretomotor fibres to the otic ganglion.
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The mandibular nerve divides into three main branches: anterior, posterior, and middle.
The mandibular nerve divides into three main branches: anterior, posterior, and middle.
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The meningeal branch of the mandibular nerve supplies the meninges of the anterior half of the middle cranial fossa.
The meningeal branch of the mandibular nerve supplies the meninges of the anterior half of the middle cranial fossa.
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The motor root to the otic ganglion synapses within the ganglion before supplying the tensor muscles.
The motor root to the otic ganglion synapses within the ganglion before supplying the tensor muscles.
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The buccal nerve is the only sensory branch arising from the anterior division of the mandibular nerve.
The buccal nerve is the only sensory branch arising from the anterior division of the mandibular nerve.
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The deep temporal branches of the mandibular nerve pass beneath the upper border of the lateral pterygoid muscle.
The deep temporal branches of the mandibular nerve pass beneath the upper border of the lateral pterygoid muscle.
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The mandibular nerve is formed by the union of the ophthalmic and maxillary nerves.
The mandibular nerve is formed by the union of the ophthalmic and maxillary nerves.
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The masseteric nerve provides an articular branch to the temporomandibular joint, consistent with Hilton's law.
The masseteric nerve provides an articular branch to the temporomandibular joint, consistent with Hilton's law.
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The otic ganglion receives its secretomotor root from the lesser petrosal nerve.
The otic ganglion receives its secretomotor root from the lesser petrosal nerve.
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The mandibular nerve exits the cranial cavity via the foramen rotundum.
The mandibular nerve exits the cranial cavity via the foramen rotundum.
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The nervus spinosus supplies sensory innervation to the cartilaginous portion of the auditory tube.
The nervus spinosus supplies sensory innervation to the cartilaginous portion of the auditory tube.
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Flashcards
Mandibular Nerve
Mandibular Nerve
The mandibular nerve is the third division of the trigeminal nerve, containing both motor and sensory fibers.
Foramen Ovale
Foramen Ovale
A key anatomical structure where the mandibular nerve emerges after joining its motor root.
Otic Ganglion
Otic Ganglion
A small cluster of nerve cells associated with the mandibular nerve, involved in motor functions.
Meningeal Branch
Meningeal Branch
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Buccal Nerve
Buccal Nerve
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Tensor Palati Muscle
Tensor Palati Muscle
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Deep Temporal Nerves
Deep Temporal Nerves
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Masseteric Nerve
Masseteric Nerve
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Lateral Pterygoid Muscle
Lateral Pterygoid Muscle
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Hilton's Law
Hilton's Law
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Auriculotemporal Nerve
Auriculotemporal Nerve
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Inferior Alveolar Nerve
Inferior Alveolar Nerve
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Mental Nerve
Mental Nerve
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Lingual Nerve
Lingual Nerve
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Chorda Tympani
Chorda Tympani
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Mylohyoid Nerve
Mylohyoid Nerve
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Auriculotemporal Functions
Auriculotemporal Functions
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Branches from the Posterior Division
Branches from the Posterior Division
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Study Notes
Mandibular Nerve Overview
- Originates from the trigeminal ganglion in the dura mater, lateral to the cavernous sinus
- Joins the motor root of the trigeminal nerve
- Passes through the foramen ovale
- Located deep to the upper (infratemporal) head of the lateral pterygoid
- Situated on the tensor palati muscle
- Otic ganglion is situated on the nerve's deep surface (4 cm deep to the articular tubercle)
- Splits into an anterior (mainly motor) and a posterior (mainly sensory) branch
Branches from the Main Trunk
-
Meningeal branch (nervus spinosus):
- Sensory branch
- Re-enters middle cranial fossa via foramen spinosum or foramen ovale
- Supplies meninges of the posterior middle cranial fossa, mastoid antrum, air cells, and the cartilaginous part of the auditory tube
-
Nerve to the medial pterygoid:
- Motor branch
- Supplies the medial pterygoid muscle
- Contains a motor root for the otic ganglion; this root supplies the tensor palati and tensor tympani muscles; crucial to not confuse with the secretomotor root (lesser petrosal nerve)
Branches from the Anterior Division
- Primarily motor, except the buccal nerve
- Deep temporal branches:
- Supply Temporalis muscle (anterior, posterior, and sometimes middle)
- Masseteric nerve:
- Supplies the masseter muscle
- Gives an articular branch to the temporomandibular joint, adhering to Hilton's law
- Nerve to the lateral pterygoid:
- Supplies both heads of the lateral pterygoid muscle
- Buccal nerve:
- Exclusively sensory
- Contains all common sensation fibers of the anterior mandibular division
- Emerges between the lateral pterygoid heads
- Passes down and forward on the deep surface of Temporalis, running on the buccinator
- Supplies skin over the cheek, buccinator muscle (proprioceptive fibers), cheek's mucous membrane, and the gum opposite lower molars and second premolar
Branches from the Posterior Division
- Mainly sensory
- Auriculotemporal nerve:
- Derived from two roots, embracing the middle meningeal artery
- Passes backward between the mandible's neck and the sphenomandibular ligament, superior to maxillary vessels
- Supplies the temporomandibular joint, and skin of the tragus, upper pinna, external acoustic meatus, outer tympanic membrane
- Innervates, the skin of the temple, and the parotid gland, receiving postganglionic secretomotor fibers from the otic ganglion
- Inferior alveolar nerve:
- Emerges below the lower head of the lateral pterygoid
- Curves down on the medial pterygoid
- Enters the mandibular foramen
- Location where anesthetic solution is given
- Supplies teeth (three molars, two premolars)
- Divides into mental and incisive nerves
- Mylohyoid nerve
- Branch of the inferior alveolar nerve
- Supplies the mylohyoid muscle and anterior belly of the digastric
- Lingual nerve:
- Appears beneath the lateral pterygoid, next to the side wall of the pharynx
- Passes between the medial pterygoid and the mandible
- Contacts the mandible, sometimes leaving a groove below and medial
- Enters the mouth on the surface of the mylohyoid, below the mouth's mucous membrane
- Receives chorda tympani branch (from facial nerve), which supplies taste and parasympathetic secretomotor function to the anterior two-thirds of the tongue
- Travels with this chorda tympani branch for sensation and secretion
Otic Ganglion
- Small, flat structure, not pea-shaped, between the tensor palati and mandibular nerve
- Situated just beneath the foramen ovale
- Relay station for parasympathetic secretomotor fibers to the parotid gland
- Lesser petrosal branch of the glossopharyngeal nerve is involved
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Description
Explore the detailed anatomy of the mandibular nerve, including its origin, branches, and functions. This quiz covers key aspects such as the motor and sensory components and their anatomical relationships. Test your knowledge on this important cranial nerve.
