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Cover Image of Role of Proprioceptive Feedback From Nonspiking Mechanosensory Cells in the Sand Crab, Emerita Analoga
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Role of Proprioceptive Feedback From Nonspiking Mechanosensory Cells in the Sand Crab, Emerita Analo...

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Bibliographic Details
Journal Title: Journal of Experimental Biology
Authors and Corporations: Paul, Dorothy Hayman
In: Journal of Experimental Biology, 65, 1976, 1, p. 243-258
Type of Resource: E-Article
Language: English
published:
The Company of Biologists
Description
Abstract: <jats:title>ABSTRACT</jats:title> <jats:p>The two programmes underlying uropod beating in Emerita (‘swimming’ and ‘treading water’) are distinguished by a difference in timing of the power stroke within the interval between return strokes (cycle). While ‘swimming’ (cycles approx. 80–400 ms) the phase and while ‘treading water’ (cycles approx. 100–700 ms) the latency of the power stroke are relatively invariant. Analyses of electromyograms of unrestrained Emerita, before and after bilateral surgical ablation of the four nonspiking mechano- receptive cells associated with each uropod, established that power strokes in ‘treading water’ are dependent upon proprioceptive feedback from the nonspiking cells. As cycle duration increases from 80 to 700 ms, the function of the reafference changes from reinforcement of the centrally generated ‘swimming’ pattern to production of the ‘treading water’ pattern.</jats:p>
Physical Description: 243-258
ISSN: 0022-0949
1477-9145
DOI: 10.1242/jeb.65.1.243