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Gustatory stimulating technique for glossopharyngeal neurophysiological recordings
1Laboratory of Neurobiology and Behavior, Rockefeller University, New York, NY 10021.
Journal of Neuroscience Methods
|July 1, 1988
Summary
A novel technique enhances study of the glossopharyngeal nerve's gustatory sensitivity by enabling rapid tastant delivery and adaptation. This method allows for clearer analysis of taste responses, overcoming previous limitations.
Area of Science:
- Neuroscience
- Sensory Physiology
Background:
- The glossopharyngeal nerve transmits multisensory information from the posterior tongue.
- Studying its gustatory function is challenging due to concurrent tactile and thermal stimuli.
- Taste buds are located in papillae trenches, hindering rapid solution exchange.
Purpose of the Study:
- To present a new technique for studying glossopharyngeal nerve gustatory sensitivity.
- To overcome limitations of previous methods in delivering tastant solutions and controlling sensory input.
Main Methods:
- Utilized an infusion pump and double-barrelled pipette for precise tastant and adapting solution delivery.
- Placed the pipette into the circumvallate papilla trench for direct receptor access.
- Implemented continuous solution flow, switching between adapting and stimulating solutions.
Main Results:
- Achieved rapid delivery and removal of tastant solutions.
- Enabled complete adaptation of tactile sensory components.
- Produced gustatory responses with significant phasic components, similar to other gustatory nerves.
Conclusions:
- The new technique facilitates the study of glossopharyngeal nerve gustatory function.
- It allows for more accurate assessment of temporal characteristics of gustatory responses.
- This method improves the investigation of taste perception in the posterior tongue region.