Oscillations in the embryonic chick olfactory bulb: initial expression and development revealed by optical imaging with a voltage-sensitive dye

被引:3
作者
Sato, Katsushige [1 ]
Hayashi, Shihori [2 ]
Inaji, Motoki [2 ]
Momose-Sato, Yoko [3 ]
机构
[1] Komazawa Womens Univ, Fac Human Hlth, Dept Hlth & Nutr Sci, Inagi, Tokyo 2068511, Japan
[2] Tokyo Med & Dent Univ, Fac Med, Grad Sch, Dept Neurosurg, Tokyo 113, Japan
[3] Kanto Gakuin Univ, Coll Nutr, Dept Nutr & Dietet, Kanazawa Ku, Yokohama, Kanagawa, Japan
关键词
chick embryo; olfactory bulb; optical recording; oscillation; voltage-sensitive dye; PIRIFORM CORTEX ACTIVITY; CENTRAL-NERVOUS-SYSTEM; BRAIN-STEM; FUNCTIONAL-ORGANIZATION; GABAERGIC INTERNEURONS; ODOR DISCRIMINATION; GAMMA-OSCILLATIONS; NEURAL ACTIVITY; RAT; RECORDINGS;
D O I
10.1111/ejn.13189
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
In a previous study, we applied a multiple-site optical recording technique with a voltage-sensitive dye to the embryonic chick olfactory system and showed that functional synaptic transmission in the olfactory bulb was expressed at embryonic 6-7-day stages. It is known that oscillations, i.e. stereotyped sinusoidal neural activity, appear in the olfactory system of various species. The focus of the present study is to determine whether the oscillation is also generated in the embryonic chick olfactory bulb and, if this is the case, when the oscillation appears and how its profiles change during embryogenesis. At the early stages of development (embryonic 6- to 8-day stages), postsynaptic response-related optical signals evoked by olfactory nerve stimulation exhibited a simple monophasic waveform that lasted for a few seconds. At embryonic 9-day stage, the optical signal became multi-phasic, and the oscillatory event was detected in some preparations. The oscillation was restricted to the distal half of the olfactory bulb. As development proceeded, the incidence and duration of the oscillation gradually increased, and the waveform became complicated. In some cases at embryonic 12-day stage, the oscillation lasted for nearly a minute. The frequency of the oscillation increased slightly with development, but it remained in the range of theta oscillation during the 9- to 12-day stages. We discuss the ontogenetic dynamics of the oscillation and the significance of this activity in the developing olfactory bulb.
引用
收藏
页码:1111 / 1121
页数:11
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