MICROANATOMY

Detailed explanation-1: -The trigeminal nerve is the fifth cranial nerve (CN V) and the largest of the cranial nerves. Its primary function is to provide sensory innervation to the face and is divided into three main branches.

Detailed explanation-2: -The hypoglossal nerve is mainly a somatic efferent (motor) nerve to innervate the tongue musculature. The nerve also contains some sympathetic postganglionic fibers from the cervical ganglia, which innervates tongue vessels and some small glands in the oral mucosa.

Detailed explanation-3: -Sensation on the face is innervated by the trigeminal nerves (V) as are the muscles of mastication, but the muscles of facial expression are innervated mainly by the facial nerve (VII) as is the sensation of taste.

Detailed explanation-4: -The auriculotemporal nerve provides sensory innervation to the temporomandibular joint (branches of temporalis and masseter nerve also provide sensory innervation to the temporomandibular joint).