抄録
In decerebrate and unanesthetized cats, changes in the intracellular potential of neurons in the hypoglossal nucleus following stimulation of the hypoglossal nerve were recorded.
1. Of 158 cells examined, motoneurons (94.3%), interneurons (5.7%) were distinguished by hypoglossal nerve stimulation.
2. Two groups of motoneurons responded differently in critical frequency for SD and/or IS blocking to the antidromic stimulation.
3. Sizes of the motor axons were estimated from the conduction distance and latency of antidromic invasion to each motoneuron. The diameter distribution revealed gross unimodal configuration with the peak between 3 and 5μ.
4. Some of the characters of the potential change in the “respiratory” hypoglossal motoneurons and slow fluctuations of various rhythm in others were reported.
