Despite the fact that the previous answer gives a very in-depth and scientific answer, I’m going to try and make it easier to understand. Not all of us are biologists that specialize in the tongue. So, the question is asking what we call the location of the cells that carry taste down the front two-thirds of the tongue.
Easy enough to answer; we call this the geniculate ganglion. Yikes, that’s a mouthful. It is basically the scientific way of saying “taste tunnel”; look up anything about taste and words relating to “geniculate” will appear.
These are like the axons and axon tunnels in the diagram shown above. They take the sensation of taste from the taste buds and transfer it down the tongue, where it is passed off on a chain reaction to the brain.
Geniculate ganglion- the geniculate ganglion is the sensory ganglion of the facial nerve-it holds the cell bodies of the neurons that carry taste sensations from the anterior 2/3 of the tongue. these fibers then travel on the chorda tympani, which carries the fibers to the lingual nerve. the chorda tympani fibers then jump on the lingual nerve so they can reach the tongue and provide taste sensation to the anterior 2/3. the otic ganglion is the ganglion where parasympathetic fibers synapse before innervating the parotid gland. the lesser petrosal nerve is a branch of the glossopharyngeal nerve (cn ix) that carries presynaptic parasympathetic fibers to the otic ganglion. these fibers synapse in the otic ganglion, and the postsynaptic fibers travel on the auriculotemporal nerve to the parotid gland.
the pterygopalatine ganglion is the ganglion that enables secretomotor innervation to the mucous glands of the palate, nasal cavity, and lacrimal gland. preganglionic fibers arrive at this ganglion from the greater petrosal nerve of the facial nerve. the submandibular ganglion receives preganglionic parasympathetic fibers from the chorda tympani; the postsynaptic fibers from the submandibular ganglion go to provide secretomotor innervation to the sublingual and submandibular glands. finally, the trigeminal ganglia (also called the semilunar ganglia) is a sensory ganglion equivalent in histological structure and function to a dorsal root ganglion. the cell bodies of the afferent fibers of the trigeminal nerve reside in this ganglion.