Arkansas Esthetician Practice Exam

The maxillary branch, or V2, provides sensory innervation to the midface and does not include the lower third of the face. Similarly, the internal carotid artery does not provide innervation. Leucocytes are a type of white blood cell and have no relation to nerve branches. The correct answer is the mandibular branch, or V3, which is responsible for sensory and motor innervation of the lower 1/3 of the face. It also supplies motor fibers to the muscles of mastication. This branch emerges from the brainstem at the level of the trigeminal ganglion and splits into three main divisions the temporal, lingual, and inferior alveolar nerves. The lingual nerve provides sensation to the anterior two-thirds of the tongue, while the inferior alveolar nerve supplies sensation to the lower teeth and chin. Overall, it is the mandibular branch that is responsible for sensation in the lower 1/3 of the face, making it the correct answer to this question.