Effects of Selective Lingual Gustatory Deafferentation on Suprathreshold Taste Intensity Discrimination of NaCl in Rats
| Autor: | Mircea Garcea, Connie L. Colbert, Alan C. Spector |
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| Rok vydání: | 2004 |
| Předmět: |
Male
medicine.medical_specialty Taste Sodium Differential Threshold chemistry.chemical_element Sodium Chloride Discrimination Learning Rats Sprague-Dawley Intensity discrimination Behavioral Neuroscience Internal medicine medicine Animals Glossopharyngeal Nerve Saline Solution Hypertonic Analysis of Variance Behavior Animal Detection threshold Taste Buds Denervation Facial nerve Glossopharyngeal Nerve Transection Rats Endocrinology Taste intensity chemistry Taste Threshold Chorda Tympani Nerve Chorda tympani nerve |
| Zdroj: | Behavioral Neuroscience. 118:1409-1417 |
| ISSN: | 1939-0084 0735-7044 |
| DOI: | 10.1037/0735-7044.118.6.1409 |
| Popis: | In rats, chorda tympani nerve transection (CTX) greatly increases the detection threshold of sodium chloride (NaCl) and severely disrupts salt discriminability. Here it is shown that CTX has surprisingly little effect, if any, on suprathreshold intensity discrimination. Glossopharyngeal nerve transection (GLX), which has no reported effect on salt sensibility, also did not affect performance. Rats were tested in a 2-response, operant taste intensity discrimination task. Difference thresholds for CTX rats were only slightly higher (-0.15 log/10 unit) than those for GLX and sham-transected rats, when 0.05 M served as the standard, and did not significantly differ when 0.1 M NaCl was the standard. Although the perceived intensity of NaCl might be reduced by CTX, input from remaining taste nerves sufficiently maintains the relative discriminability of suprathreshold NaCl concentrations. |
| Databáze: | OpenAIRE |
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