Hanamori T, Kunitake T, Kato K, Kannan H
Department of Physiology, Miyazaki Medical College, Kiyotake, Japan.
Brain Res. 1997 Jul 25;763(2):267-70. doi: 10.1016/s0006-8993(97)00483-6.
The responses of single neurons in the insular cortex to electrical stimulation of the chorda tympani (CT), lingual-tonsillar branch of the glossopharyngeal (LT-IXth) nerve, pharyngeal branch of the glossopharyngeal (PH-IXth) nerve, and superior laryngeal (SL) nerve were recorded in anaesthetized and paralyzed rats. Ninety-four neurons responding to stimulation of at least one of the four nerves were identified from the insular cortex. Most of the neurons were located in the posterior portion of the insular cortex; the mean location was 0.8 mm anterior to the anterior edge of the joining of the anterior commissure (AC) and was 1.4 mm dorsal to the rhinal fissure (RF). Of the 94 neurons, 84 (89%) received convergent inputs from two or more nerves, and the remaining 10 (11%) received inputs from one nerve. The neurons responding to the CT stimulation were distributed more anteriorly than those responding to other three nerves in the anterior-posterior dimension. Our results indicate that the neurons recorded mainly from the posterior portion of the insular cortex receive convergent inputs from the oropharyngolaryngeal regions.
在麻醉和麻痹的大鼠中，记录了岛叶皮质单个神经元对鼓索神经（CT）、舌咽神经舌扁桃体支（LT-IXth）、舌咽神经咽支（PH-IXth）和喉上神经（SL）电刺激的反应。从岛叶皮质中识别出94个对四种神经中至少一种刺激有反应的神经元。大多数神经元位于岛叶皮质的后部；平均位置在前连合（AC）连接前缘前方0.8毫米处，在鼻裂（RF）背侧1.4毫米处。在这94个神经元中，84个（89%）接受来自两条或更多神经的汇聚输入，其余10个（11%）接受来自一条神经的输入。在前后维度上，对CT刺激有反应的神经元比其他三种神经的分布更靠前。我们的结果表明，主要从岛叶皮质后部记录的神经元接受来自口咽喉区域的汇聚输入。
