Abstract:
:By recording the locomotor activity rhythm of hagfish, Eptatretus burgeri, in which surgical lesions of the pretectal areas were made, we searched for the route of light information from the eyes to the circadian pacemaker, which is considered to be located in the preoptic nucleus. The entrainment of circadian activity rhythm to the light dark cycle, under 12 h light/12 h dark (12L:12D) was lost in animals whose pretectum was ablated with a pair of scissors and the animals then showed a free-running rhythm. Destruction of the pretectal areas with a high-frequency lesion generator also caused a free-running rhythm under 12L:12D. These findings indicate that retinal information may entrain the circadian rhythm via the pretectal areas, which have retinofugal connections.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Ooka-Souda S,Kadota T,Kabasawa H,Takeuchi Hdoi
10.1016/0304-3940(95)11645-dsubject
Has Abstractpub_date
1995-06-16 00:00:00pages
201-4issue
3eissn
0304-3940issn
1872-7972pii
030439409511645Djournal_volume
192pub_type
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