Motor nucleus of the trigeminal nerve

The motor nucleus of the trigeminal nerve is the only motor nucleus of the four main trigeminal nerve nuclei.

Gross anatomy

The motor nucleus is a paired structure located within the upper pons (tegmentum). It lies anteromedial to the main sensory nucleus and adjacent to the lateral aspect of the floor of the fourth ventricle.

Innervation

The motor nucleus of the trigeminal nerve houses the cell bodies that innervate all of the muscles derived from the first pharyngeal arch. These include the muscles of mastication (lateral pterygoid, medial pterygoid, masseter and temporalis muscles) in addition to tensor tympani, tensor veli palatini, mylohyoid and the anterior belly of the digastric muscles 1.

Anatomy: Brain

Anatomy: Brain

Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 76837
Section: Anatomy
Synonyms or Alternate Spellings:
  • Motor nucleus

Support Radiopaedia and see fewer ads

Cases and figures

  • Figure 1: brainstem motor nuclei - Gray's anatomy illustration
    Drag here to reorder.
  • Figure 2: brainstem nuclei: dorsal section - Gray's anatomy illustration
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.