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Paper Abstract and Keywords
Presentation 2020-05-15 16:15
The relationship between circadian modulation of the frequency of carbachol-induced beta oscillations and the inhibitory neuron mechanism.
Masaya Shigemoto, Yoshitaka Ohtubo, Kiyohisa Natsume (Kyutech) NLP2020-10
Abstract (in Japanese) (See Japanese page) 
(in English) The physiological activity of animal’s brain is modulated by diurnal rhythm that depends on light/dark cycle. The rhythm is generated in suprachiasmatic nucleus in the brain. The performance in the memory task which depends on the activity of hippocampus is also modulated by the rhythm. Theta and beta waves are related to the memory process. However, the relationship between the brain waves and the diurnal rhythm has not yet been clarified. Hence so far we have investigated the relationship using the carbachol-induced beta oscillations induced in rat hippocampal slices. We found that the frequency was significant lower at night of Zeitgeber Time (ZT) 16-19. In the present study we studied the diurnal rhythmicity of the parameters of beta oscillations, and the involvement of the activity of the inhibitory neurons. In results, 1) the locomotion activity had the peak around at ZT18. 2) Among the oscillatory parameters only the frequency had the significant diurnal rhythmicity. 3) The pair-pulse ratio of the spike activity tended to be higher at ZT16-19 than the other ZT’s. The ratio reflects the degree of the disinhibition. Together with the previous results the previous study, these results suggest that the brain wave in the hippocampus will be modulated by diurnal rhythm through the modulation of the inhibitory transmission.
Keyword (in Japanese) (See Japanese page) 
(in English) Hippocampus / Beta rhythm / Inhibitory neuron / Diurnal rhythm / GABAA receptor / Frequency / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 26, NLP2020-10, pp. 49-54, May 2020.
Paper # NLP2020-10 
Date of Issue 2020-05-08 (NLP) 
ISSN Online edition: ISSN 2432-6380
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Conference Information
Committee NLP  
Conference Date 2020-05-15 - 2020-05-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NLP 
Conference Code 2020-05-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The relationship between circadian modulation of the frequency of carbachol-induced beta oscillations and the inhibitory neuron mechanism. 
Sub Title (in English)  
Keyword(1) Hippocampus  
Keyword(2) Beta rhythm  
Keyword(3) Inhibitory neuron  
Keyword(4) Diurnal rhythm  
Keyword(5) GABAA receptor  
Keyword(6) Frequency  
Keyword(7)  
Keyword(8)  
1st Author's Name Masaya Shigemoto  
1st Author's Affiliation Kyushu Institute of Technology (Kyutech)
2nd Author's Name Yoshitaka Ohtubo  
2nd Author's Affiliation Kyushu Institute of Technology (Kyutech)
3rd Author's Name Kiyohisa Natsume  
3rd Author's Affiliation Kyushu Institute of Technology (Kyutech)
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Speaker Author-1 
Date Time 2020-05-15 16:15:00 
Presentation Time 25 minutes 
Registration for NLP 
Paper # NLP2020-10 
Volume (vol) vol.120 
Number (no) no.26 
Page pp.49-54 
#Pages
Date of Issue 2020-05-08 (NLP) 


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