Circadian rhythm in the neurally isolated lamina-medulla-complex of the cricket, Gryllus bimaculatus

Kenji Tomioka, Yoshihiko Chiba

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Efferent neuronal activities of the neurally isolated lamina-medulla-complex of the cricket (Gryllus bimaculatus) optic lobe were recorded extracellularly from the optic stalk using a suction electrode. The multiple unit activities of the lamina-medulla-compound eye-system exhibited clear circadian rhythms under constant conditions. In constant light, all specimens exhibited a peak discharge frequency in the subjective night, free-running with a period longer than 24 h. On the other hand, either diurnal or nocturnal increase occurred in specimens kept under constant darkness or in insects with optic nerve severed. Removal of the cerebral lobe and/or suboesophageal ganglion did not affect these rhythms. These results may be regarded as almost conclusive evidence that the lamina-medulla-complex involves a neural mechanism, i.e. a circadian oscillator, which can generate periodic activity without any neural input from the other central nervous system structures.

Original languageEnglish
JournalJournal of Insect Physiology
Volume32
Issue number9
DOIs
Publication statusPublished - 1986
Externally publishedYes

Fingerprint

Gryllidae
Gryllus bimaculatus
Darkness
laminae (animals)
Suction
Optic Nerve
Circadian Rhythm
Ganglia
Running
circadian rhythm
Insects
Electrodes
Central Nervous System
optics
Light
optic lobe
subesophageal ganglia
compound eyes
electrodes
central nervous system

Keywords

  • circadian rhythm
  • Cricket
  • lamina-medulla-complex
  • neuronal activity
  • optic lobe

ASJC Scopus subject areas

  • Insect Science
  • Physiology

Cite this

Circadian rhythm in the neurally isolated lamina-medulla-complex of the cricket, Gryllus bimaculatus. / Tomioka, Kenji; Chiba, Yoshihiko.

In: Journal of Insect Physiology, Vol. 32, No. 9, 1986.

Research output: Contribution to journalArticle

@article{fe6a88a77c6446709c19a9d349a07176,
title = "Circadian rhythm in the neurally isolated lamina-medulla-complex of the cricket, Gryllus bimaculatus",
abstract = "Efferent neuronal activities of the neurally isolated lamina-medulla-complex of the cricket (Gryllus bimaculatus) optic lobe were recorded extracellularly from the optic stalk using a suction electrode. The multiple unit activities of the lamina-medulla-compound eye-system exhibited clear circadian rhythms under constant conditions. In constant light, all specimens exhibited a peak discharge frequency in the subjective night, free-running with a period longer than 24 h. On the other hand, either diurnal or nocturnal increase occurred in specimens kept under constant darkness or in insects with optic nerve severed. Removal of the cerebral lobe and/or suboesophageal ganglion did not affect these rhythms. These results may be regarded as almost conclusive evidence that the lamina-medulla-complex involves a neural mechanism, i.e. a circadian oscillator, which can generate periodic activity without any neural input from the other central nervous system structures.",
keywords = "circadian rhythm, Cricket, lamina-medulla-complex, neuronal activity, optic lobe",
author = "Kenji Tomioka and Yoshihiko Chiba",
year = "1986",
doi = "10.1016/0022-1910(86)90077-6",
language = "English",
volume = "32",
journal = "Journal of Insect Physiology",
issn = "0022-1910",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - Circadian rhythm in the neurally isolated lamina-medulla-complex of the cricket, Gryllus bimaculatus

AU - Tomioka, Kenji

AU - Chiba, Yoshihiko

PY - 1986

Y1 - 1986

N2 - Efferent neuronal activities of the neurally isolated lamina-medulla-complex of the cricket (Gryllus bimaculatus) optic lobe were recorded extracellularly from the optic stalk using a suction electrode. The multiple unit activities of the lamina-medulla-compound eye-system exhibited clear circadian rhythms under constant conditions. In constant light, all specimens exhibited a peak discharge frequency in the subjective night, free-running with a period longer than 24 h. On the other hand, either diurnal or nocturnal increase occurred in specimens kept under constant darkness or in insects with optic nerve severed. Removal of the cerebral lobe and/or suboesophageal ganglion did not affect these rhythms. These results may be regarded as almost conclusive evidence that the lamina-medulla-complex involves a neural mechanism, i.e. a circadian oscillator, which can generate periodic activity without any neural input from the other central nervous system structures.

AB - Efferent neuronal activities of the neurally isolated lamina-medulla-complex of the cricket (Gryllus bimaculatus) optic lobe were recorded extracellularly from the optic stalk using a suction electrode. The multiple unit activities of the lamina-medulla-compound eye-system exhibited clear circadian rhythms under constant conditions. In constant light, all specimens exhibited a peak discharge frequency in the subjective night, free-running with a period longer than 24 h. On the other hand, either diurnal or nocturnal increase occurred in specimens kept under constant darkness or in insects with optic nerve severed. Removal of the cerebral lobe and/or suboesophageal ganglion did not affect these rhythms. These results may be regarded as almost conclusive evidence that the lamina-medulla-complex involves a neural mechanism, i.e. a circadian oscillator, which can generate periodic activity without any neural input from the other central nervous system structures.

KW - circadian rhythm

KW - Cricket

KW - lamina-medulla-complex

KW - neuronal activity

KW - optic lobe

UR - http://www.scopus.com/inward/record.url?scp=38249041485&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38249041485&partnerID=8YFLogxK

U2 - 10.1016/0022-1910(86)90077-6

DO - 10.1016/0022-1910(86)90077-6

M3 - Article

AN - SCOPUS:38249041485

VL - 32

JO - Journal of Insect Physiology

JF - Journal of Insect Physiology

SN - 0022-1910

IS - 9

ER -