Difference in receptive field features of taste neurons in rat granular and dysgranular insular cortices
Difference in receptive field features of taste neurons in rat granular and dysgranular insular cortices
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大鼠颗粒状和颗粒异常岛叶皮质味觉神经元感受野特征的差异
DOI：
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发表时间：
1992
影响因子：
2
通讯作者：
K. Hasegawa
中科院分区：
文献类型：
--
作者：
H. Ogawa;N. Murayama;K. Hasegawa
在大鼠口腔内共检测到59个皮层味觉神经元的感受野（RFs），其中颗粒岛区、GI区35个，非颗粒岛区、DI区21个，颗粒岛区、AI区3个。仅在口腔前区出现RFs的神经元比例在GI区（74.3%）明显大于DI区（42.9%）。另一方面，口腔前后区均有RFs的神经元比例在DI区（42.9%）大于GI区（11.4%）。综上所述，GI区参与了对口腔内多种味觉刺激的识别，而DI区则对来自不同口腔区域的味觉信息进行了整合。根据四种基本味觉中最兴奋的最佳刺激对神经元进行分类，不同种类的味觉神经元在口腔的不同部位有RFs。这表明，在味觉区域中，不同种类的味觉神经元参与不同种类的味觉编码。两个区域的大多数神经元都有双侧射频反射。在GI区，单个味蕾亚群上的RFs神经元在皮层吻侧区明显多于尾侧区。在DI区射频类型与皮质定位之间没有这种关系。味觉神经元对口腔皮层表面的地形表征不明显。味觉神经元的射频特征在皮层各层间没有差异。
SummaryReceptive fields (RFs) of 59 cortical taste neurons (35 in the granular insular area, area GI, 21 in the dysgranular insular area, area DI, and 3 in the agranular insular area, area AI) were identified in the oral cavity of the rat. The fraction of the neurons with RFs in the anterior oral cavity only was significantly larger in area GI (74.3%) than in area DI (42.9%). On the other hand, the fraction of neurons with RFs in both the anterior and posterior oral cavity was larger in area DI (42.9%) than in area GI (11.4%). On the whole, it is suggested that area GI is involved in discrimination of several taste stimuli in the oral cavity, whereas in area DI taste information originating from various regions of the oral cavity is integrated. When neurons were classified according to the best stimulus which most excited the neuron among the four basic tastes, different categories of taste neurons had RFs in different parts of the oral cavity. It is suggested that, in either taste area, different categories of taste neurons are involved in different sorts of taste coding. The majority of neurons in both areas had bilateral RFs. In area GI, neurons with RFs on single subpopulations of taste buds were significantly more numerous at the rostral region of the cortex than at the caudal region. There was no such relation between RF types and cortical localization in area DI. Otherwise, topographic representation of the oral cavity by taste neurons on the cortical surface was not obvious. RF features of taste neurons did not differ across layers in either cortical area.
味觉厌恶学习的皮质基质：背侧梨前状（岛状）病变破坏味觉厌恶学习。
DOI：
10.1037/h0077894
发表时间：
1982
期刊：
Journal of comparative and physiological psychology
影响因子：
--
作者：
Lasiter,PS;Glanzman,DL
通讯作者：
Glanzman,DL