Question

Which nerve does general and taste in posterior 1/3rd of tongue?

Answer 1

Chorda tympani nerve does general and taste in posterior 1/3rd of tongue

Step-by-step explanation:

The chorda tympani, a branch of the facial nerve (CN VII), carries general sensation and taste information from the posterior 1/3rd of the tongue.

The chorda tympani, originating from the facial nerve, is responsible for carrying both general and taste sensations from the posterior 1/3rd of the tongue. It joins with the lingual nerve, a branch of the mandibular division of the trigeminal nerve (CN V3), and travels within the lingual nerve to reach the tongue.

The taste fibers it carries are specifically for the anterior two-thirds of the tongue, while the lingual nerve itself supplies general sensation to the posterior one-third.

This intricate arrangement highlights the shared responsibilities of different cranial nerves in providing sensory innervation to the tongue, with the chorda tympani playing a crucial role in taste transmission.

Answer 2

The nerve responsible for general sensation in the posterior 1/3rd of the tongue is the glossopharyngeal nerve (IX), while taste sensation in the same region is mediated by the chorda tympani branch of the facial nerve (VII).

Step-by-step explanation:

The glossopharyngeal nerve (IX) plays a crucial role in providing general sensation to the posterior 1/3rd of the tongue. It carries sensory fibers from this region to the brain, allowing for the perception of touch, pressure, and pain. This nerve is essential for the overall sensory function of the tongue and contributes to the complex neural network involved in taste perception.

In addition to the glossopharyngeal nerve, taste sensation in the posterior 1/3rd of the tongue is mediated by the chorda tympani branch of the facial nerve (VII). The chorda tympani carries taste fibers from this region to the brain, specifically to the gustatory nucleus in the medulla oblongata. This intricate system enables individuals to experience the diverse flavors of food and beverages. The collaboration between the glossopharyngeal and facial nerves illustrates the intricate neural pathways that contribute to the sensory richness of taste perception in the posterior part of the tongue.

In summary, the glossopharyngeal nerve handles general sensation, while the chorda tympani branch of the facial nerve manages taste sensation in the posterior 1/3rd of the tongue. This dual involvement of different cranial nerves emphasizes the complexity of the sensory mechanisms at play in the perception of both general and taste sensations in this specific region of the tongue.