ISSN:
1432-2013
Keywords:
Deiters Neurones
;
Excitation
;
Inhibition
;
Cerebellum
;
Ascending Pathways
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary Experiments were carried out on cats anesthetized with chloralose, small doses of Thiopental being added in about half of the animals. Recordings were made from neurones located in Deiters' nucleus. Single shocks applied to the spinal cord evoked membrane potential changes consisting of different types of PSPs. Current analysis revealed: EPSPs, IPSPs, and potential changes due to disinhibition; such components differing in their latencies. Upon stimulation at C2, there were EPSPs with brief (mean 1.7 ms) and longer (mean 5.8 ms) latencies, denoted “EE” and “CE”, respectively. Also, IPSPs showed up with brief (mean 3.6 ms, “MI”) and longer (mean 7.3 ms, “CI”) latencies. Moreover, there was a prolonged inhibition usually turning into a longlasting (up to several hundred milliseconds) disinhibitory depolarization. Of Deiters neurones exhibiting PSPs upon spinal cord stimulation, 66% showed the complete synaptic pattern, 34% short latency or long latency components in isolation. The patterns obtained intracellularly corresponded well to discharge patterns recorded extracellularly. The results were essentially similar in control experiments performed on precollicularly decerebrated cats.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00587835
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