Effects of selective lingual gustatory deafferentation on suprathreshold taste intensity discrimination of NaCl in rats
Effects of selective lingual gustatory deafferentation on suprathreshold taste intensity discrimination of NaCl in rats
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DOI：
10.1037/0735-7044.118.6.1409
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发表时间：
2004-12-01
影响因子：
1.9
通讯作者：
Spector, AC
中科院分区：
文献类型：
--
作者：
Colbert, CL;Garcea, M;Spector, AC
在大鼠中，鼓索神经横断（CTX）大大增加了氯化钠（NaCl）的检测阈值，并严重破坏了盐的辨别能力。在这里，它表明，CTX具有令人惊讶的影响很小，如果有的话，阈上强度歧视。舌咽神经横断（GLX）对盐敏感性没有影响，也没有影响性能。在2-反应、操作性味觉强度辨别任务中测试大鼠。当以0.05 M为标准时，CTX大鼠的差异阈值仅略高于GLX和假横断大鼠（类似于0.15 log（10）单位），而当以0.1 M NaCl为标准时，差异阈值无显著性差异。虽然感知强度的氯化钠可能会减少CTX，输入剩余的味觉神经足以维持阈上氯化钠浓度的相对辨别力。
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 (similar to0.15 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.