ザリガニの防御反応について : 司令系の神経生理学的解析
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概要
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A defence reflex similar to that typically observed in natural conditions can be elicited by electrical stimulation of the command fibre C-99 found in the circumoesophageal connective. High frequency discharges of slow motor, inhibitor, and fast motor in the bender axons and those of slow motor and inhibitor in the stretcher axons are observed on the stimulation of C-99 fibre. Analysis of discharge frequencies in terms of Rc vslues (cf. Wiersma and Ellis, 1942) indicates that exitation of stretcher axons and inhibition of bender axons results from activation of the C-99 command fibre. In free-moving animals, the activity of C-99 can be modulated by multimodal sensory inputs, coming from eyes, antennae, antennules, joint receptors and sensory hairs of the anterior part of the body. Stimulation of these sensory systems produces phasic high frequency discharges of C-99 which accompanies the defence reflex. Low frequency after-discharge of C-99 continues while the reflex last. Variations in the responsiveness of C-99 command fibre with adaptation to various light intensity was studied. Behavioral habituation was found.
- 社団法人日本動物学会の論文
- 1974-09-25