Trigeminal motor nucleus
The trigeminal motor nucleus contains motor neurons that innervate muscles of the first branchial arch, namely the muscles of mastication, the tensor tympani, tensor veli palatini, mylohyoid, and anterior belly of the digastric. This nucleus is located in the mid-pons (i.e. in the center of the pons going inferior to superior).[1]
| Trigeminal motor nucleus | |
|---|---|
 The cranial nerve nuclei schematically represented; dorsal view (posterior). Motor nuclei in red; sensory in blue. (Trigeminal nerve nuclei are at "V".) | |
| Details | |
| Identifiers | |
| Latin | nucleus motorius nervi trigemini |
| MeSH | D066266 |
| NeuroNames | 559 |
| NeuroLex ID | birnlex_1222 |
| TA98 | A14.1.05.410 |
| TA2 | 5940 |
| FMA | 54562 |
| Anatomical terms of neuroanatomy | |
Lesion
The trigeminal motor nucleus forms the efferent pathway of the jaw jerk reflex. Since the axons involved in this reflex do not decussate, a lesion involving the trigeminal motor nucleus would cause ipsilateral hemiparesis.
References
- Brainstem Nuclei of the Cranial Nerves at wustl.edu Archived 2007-04-13 at the Wayback Machine
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