Impulse generated in the tastebuds of the tongue reach the cervical cortex via the: (A) Thalamus, (B) Dorsal roots of the first cervical spinal nerve, (C) Hypoglossal nerve, (D) Lingual nerve
Answer is A. A. i.e. (Thalamus) (189- Ganong 22nd) (224- Ganong 23rd)* All the afferent from the tongue, both of taste and general sensibility, travel along the same pathway to the thalamus and sensory cortex.TASTE PATHWAYS - Receptors for taste sensation are the type III cells of taste bud's* Third order neurons are in the posteroventral nucleus of the thalamus. The axons from the third order neurons project in to parietal lobe of the cerebral cortex* Taste center in the opercular insular cortex i.e. in lower part of post central gyrus* Recently Umami a fifth taste sense has been added to the four classical taste modalities {sweat, salt, sour and bitter.) This taste is pleasant and sweat but differs from the standard sweet taste.