The preoptic nucleus: the probable location of the circadian pacemaker of the hagfish, Eptatretus burgeri.

Abstract:

:By recording the locomotor activity rhythm of hagfish, Eptatretus burgeri, in which surgical lesions of the preoptic nucleus (PON) were made, we searched for the location of the circadian pacemaker in the hypothalamus. The characteristic rhythms were lost in animals lacking the anterior part of the hypothalamus, which includes the PON. Cuts in front of the PON did not affect the rhythm, but cuts behind the PON caused the animals to loose their rhythms. Destruction of the PON with a high-frequency lesion generator also caused loss of rhythms. These findings indicate that the pacemaker may be located in the PON, which has retinofugal connections.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Ooka-Souda S,Kadota T,Kabasawa H

doi

10.1016/0304-3940(93)90850-k

subject

Has Abstract

pub_date

1993-12-24 00:00:00

pages

33-6

issue

1-2

eissn

0304-3940

issn

1872-7972

pii

0304-3940(93)90850-K

journal_volume

164

pub_type

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