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Updated: May 14, 2026
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Whole-Mount Staining, Visualization, and Analysis of Fungiform, Circumvallate, and Palate Taste Buds
Published on: February 11, 2021
Thalamic contribution to cortical processing of taste and expectation
Chad L Samuelsen1, Matthew P H Gardner, Alfredo Fontanini
1Department of Neurobiology and Behavior and Graduate Program in Neuroscience, State University of New York at Stony Brook, Stony Brook, New York 11794, USA. chad.samuelsen@stonybrook.edu
Summary
The gustatory thalamus (VPMpc) significantly shapes taste processing in the gustatory cortex (GC). Its inactivation reduces taste responses but spares anticipatory cue responses, revealing distinct neural pathways.
Area of Science:
- Neuroscience
- Sensory Systems
- Gustatory System
Background:
- Taste information reaches the gustatory cortex (GC) via thalamic and limbic pathways.
- The role of the gustatory thalamus in modulating GC activity remains largely unexplored.
Purpose of the Study:
- To investigate the function of the gustatory thalamus (VPMpc) in shaping GC activity.
- To differentiate the VPMpc's role in processing uncued tastes, cued tastes, and anticipatory cues.
Main Methods:
- Behavioral electrophysiological techniques in rats.
- Inactivation of the parvicellular portion of the ventroposteromedial nucleus of the thalamus (VPMpc).
- Presentation of gustatory stimuli alone or preceded by an anticipatory cue.
Main Results:
- VPMpc inactivation dramatically reduced taste processing in the GC.
- Responses to anticipatory cues were unaffected by VPMpc inactivation.
- Identified cue-and-taste and taste-only neuron subpopulations with distinct dynamics and VPMpc connectivity.
Conclusions:
- The VPMpc plays a critical role in mediating GC responses to taste stimuli.
- Distinct neural pathways exist for processing taste information and anticipatory cues.
- Thalamic connectivity in the GC is associated with behavioral event responsiveness and temporal dynamics.
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