Head: Mandibular Nerve Flashcards

1
Q

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origin of Mandibular Nerve

A
  • Large sensory root (trigemnal ganglion)
  • Small motor (trigemnal nerve from pons)
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2
Q

Course of Mandibular Nerve

A

2 roots descend into** foramen ovale** and unite just below the foramen into Mandibular Nerve trunk, the trunk then divides into anterior and posterior division

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3
Q

Branches of trunk of Mandibular Nerve

A

Motor: Nerve to medial pterygoid, which supplies:
* Medial pterygoid
* (2 tensors) Tensor palati
* tensor tympani

Sensory
* Nervous spinosus: ascends upwards through foramen spinosum to supply dura mater of posterior cranial fossa

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4
Q

Branches of Anterior division of Mandibular Nerve

A

Motor (rest of muscles of mastication):
* Temporalis
* Masseter
* Lateral pterygoid

Sensory:
* Buccal Nerve: skin covering mucosa of buccinator muscle

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5
Q

Enumerate branches of Posterior division of Mandibular Nerve

A
  • Auriculotemporal N
  • Inferior Alveolar N
  • Lingual N
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6
Q

Course of Auriculotemporal Nerve

A
  1. orignates from post. div. of mand. N by 2 roots, around middle meningeal A
  2. It Ascends behind TMJ within the parotid gland
  3. it exits through upper part of parotid gland to reach the scalp
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7
Q

Branches of Auriculotempral N

A
  • Parotid: parotid gland
  • Articular: TMJ
    Sensory:
  • posterior 2/3 of lateral part of Auricle
  • Ear drum
  • External Auditory meatus
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8
Q

Course of Inferior Alveolar Nerve

A
  1. it runs on medial pterygoid muscle, posterior to lingual N
  2. It enters Mandibular foramen and runs through mandibular canal
  3. It terminates at mental foramen, by dividing into Mental N and Incisive N
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9
Q

Branches of Inferior Alveolar Nerve

A
  • Nerve to mylohyoid: Mylohyoid and Anterior belly of digastric
  • Insicive Nerve: to incisors and Canines
  • Mental Nerve: skin of chin and upper lip
  • Dental branches: in Mandibular Canal
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10
Q

Course of Lingual Nerve

A
  1. Deep to ramus of Mandible: it runs on Medial pterygoid muscle in front of Inferior Alveolar Nerve
  2. Deep to Body of mandible: passes in a faint groove **below last molar tooth **
  3. At side of tongue: It crosses styloglossus and upper part of hypoglossus, hooks around Submandibular Duct & gives 2 ganglionic branches to Submandibular ganglion
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11
Q

Branches of Lingual Nerve

A
  • Taste to Anterior 2/3 of tongue (through Corda tympani)
  • General sensation to Anterior 2/3 of tongue, gums, floor of mouth
  • Parasympathetic to Submandibular and sublingual Glands (through chorda tympani)
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