Class Notes (839,574)
Canada (511,407)
Linguistics (354)
Lecture 8

lecture 8.docx

2 Pages
45 Views

Department
Linguistics
Course Code
LINGUIST 2PS3
Professor
Marek Niewczas

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Description
Central Taste Pathways The main flow of taste information: taste buds  primary gustatory axons  brain stem  thalamus  cerebral cortex (see Fig. 8.8)  Three cranial nerves carry primary gustatory axons and bring taste info to the brain o The anterior two-thirds of the tongue and the palate send axons into a branch of cranial nerve VII (facial nerve) o The posterior third of the tongue is innervated by cranial nerve IX (glossopharyngeal nerve) o The regions around the throat (e.g. glottis, epiglottis, and pharynx) send taste axons to cranial nerve X (vagus nerve)  These nerves synapse within the slender gustatory nucleus From the gustatory nucleus, taste pathways diverge. The conscious experience of taste is presumably mediated by the cerebral cortex. Neurons of the gustatory nucleus synapse on a subset of small neurons in the ventral posterior medial (VPM) nucleus. These VPM taste neurons then send axons to the primary gustatory cortex. The taste pathways to the thalamus and cortex are primarily ipsilateral to the cranial nerves that supply them. Lesions within the VPM thalamus or the gustatory cortex can cause ageusia. The Neural Coding of Taste Labelled line hypothesis: If you were going to design a system for coding tastes, you might begin with many specific taste receptors for many basic tastes. Each receptor type will be connected by separate axons to neurons in the brain that also responded to only one specific taste. Therefore,
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit