The trigeminal nerve is the fifth (V) cranial nerve, so named because it splits into three nerves - the Ophthalmic nerve (V1), the Maxillary nerve (V2) and the Mandibular nerve (V3).
It is the major cutaneous sensory nerve of the head, and is responsible for sensation over most of the skin on your head. It also carries motor fibres to temporalis muscle, lateral pterygoid muscle, medial pterygoid muscle, masseter muscle (the four main muscles involved in mastication), tensor veli palatini, mylohyoid muscle and the tensor tympani muscle.
Named branches of the trigeminal nerve:
Opthalmic nerve (V1)
Maxillary nerve (V2)
Mandibular nerve (V3)
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