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A neuroanatomical gradient in the pontine tegmentum for the cholinoceptive induction of desynchronized sleep signs.

Abstract：

:Microinjection of cholinergic agonists into the pontine tegmentum was used to evoke a state which was polygraphically and behaviorally similar to desynchronized (D) sleep. This study was designed to test the hypothesis that the production of this pharmacologically induced D sleep-like state (D-ACh) was dependent upon the anatomical locus of drug administration within the pontine tegmentum. Four dependent variables of D sleep were measured: D latency, D percentage, D duration and D frequency. Multiple regression analysis and analysis of variance were performed to evaluate the relationship between the three-dimensional coordinates of the injection site (posterior, vertical and lateral) and these 4 dependent measures. The intrapontine site of drug administration accounted for a statistically significant amount of the variance in D latency, D percentage and D duration. There was no significant relationship between the anatomical site of saline injection and the dependent measures of D sleep. A significant increase in D frequency following microinjection of cholinergic agonists was found to be independent of injection site. Pontine injection sites which yielded the shortest D latencies were found to be the same sites from which the highest D percentages were evoked. Rostrodorsal pontine tegmental injection sites were most effective in producing the highest percentages of D-ACh with the shortest latencies to onset. Injections made more caudally and ventrally within the pontine tegmentum produced lower percentages of D-ACh with longer latencies to onset. These data suggest the existence of an anatomical gradient within the pontine tegmentum for the cholinoceptive evocation of a D sleep-like state, and further support the concept that D sleep is generated, in part, by pontine cholinergic mechanisms.

journal_name

Brain Res

journal_title

Brain research

authors

Baghdoyan HA,Rodrigo-Angulo ML,McCarley RW,Hobson JA

doi

10.1016/0006-8993(87)90005-9

subject

Has Abstract

pub_date

1987-06-30 00:00:00

pages

245-61

issue

2

eissn

0006-8993

issn

1872-6240

pii

0006-8993(87)90005-9

journal_volume

414

pub_type

杂志文章

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