1982
DOI: 10.1002/neu.480130405
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Electrophysiological correlates of rapid escape reflexes in intact earthworms, Eisenia foetida. I. Functional development of giant nerve fibers during embryonic and postembryonic periods

Abstract: Grids of recording electrodes etched onto printed circuit boards were used for noninvasive recording of medial (MGF) and lateral (LGF) giant nerve fiber spikes in developing earthworms, Eisenia foetida. Stereotyped patterns of through-conducted giant fiber spikes, evoked by light tactile stimulation, were first detectable in the normal crawling embryonic stage and continued to be detectable throughout postembryonic development. Giant fiber spiking activity in normal crawling embryos was accompanied by stereoty… Show more

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Cited by 38 publications
(31 citation statements)
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“…At hatching (day 0) the mean body weight for each group ranged from 4-7 mg. increases in body weight continued after day 56. These patterns of somatic growth were comparable to those obtained in previous studies of normal earthworm development (Neuhauser et al, 1980b;O'Gara, Vining, and Drewes, 1982).…”
Section: Somatic Growth In Relation To Food Deprivationsupporting
confidence: 89%
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“…At hatching (day 0) the mean body weight for each group ranged from 4-7 mg. increases in body weight continued after day 56. These patterns of somatic growth were comparable to those obtained in previous studies of normal earthworm development (Neuhauser et al, 1980b;O'Gara, Vining, and Drewes, 1982).…”
Section: Somatic Growth In Relation To Food Deprivationsupporting
confidence: 89%
“…Fig. 9, O'Gara, Vining, and Drewes, 1982). Therefore, we conclude that although severe levels of food deprivation stunted rates of giant fiber conduction, there was no apparent alteration in the predicted velocity-versus-diameter relationship in these animals.…”
Section: Functional Development Of Giant Fibers In Relation To Food Dmentioning
confidence: 66%
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“…This was first demonstrated in earthworm giant fibers by Bullock (1951), who noted during twin-pulse electrical stimulation of isolated ventral nerve cords that the second giant fiber spike in a pair of spikes was conducted 10-20% faster than the first. This phenomenon, termed "facilitation of conduction velocity," and hereafter abbreviated FCV, also was observed in vivo by means of non-invasive recordings of giant fiber spiking in earthworms (Drewes et al, 1978;Drewes and McFall, 1980;O'Gara et al, 1982). However, the potential relevance of this unusual phenomenon to oligochaete escape behavior has never been established.…”
Section: Discussionmentioning
confidence: 94%