iRAT 4 Head and Neck Practice Test 2026 – The Complete Guide to Master Your Individual Readiness Assurance!

The nerve that provides the most sensory information from the face is the trigeminal nerve. It is the main somatosensory pathway for the face, delivering general sensation—touch, pain, temperature, and proprioception—to the entire facial region through its three divisions: ophthalmic (forehead and eye area), maxillary (midface), and mandibular (lower face and jaw). The sensory cell bodies sit in the trigeminal ganglion, with pathways reaching the brainstem and thalamus to create facial sensation. The other nerves don’t cover facial skin to the same extent: the facial nerve is mainly motor to facial muscles, with only specialized sensory roles for taste in the anterior two-thirds of the tongue and minor ear sensation, while glossopharyngeal and vagus handle sensation from the throat and internal organs, not the face.