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Portio minor nervi trigemini

portio minor nervi trigemini --> motor root of trigeminal nerve

(Science: anatomy, nerve) The smaller root of the trigeminal nerve, composed of fibres originating from the trigeminal motor nucleus and emerging from the pons medial to the much larger sensory root, to join the mandibular nerve; it carries motor and proprioceptive fibres to the muscles derived from the first bronchial (mandibular) arch, including the four muscles of mastication, plus the mylohyoid, anterior belly of the digastric, and the tensores tympani and veli palati.

Synonym: radix motoria nervi trigemini, masticator nerve, portio minor nervi trigemini.


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