- 1.
In undissected, freely mobile earthworms the sensory input for tactile stimulation to the MGF and LGF shows a region of overlap occupying a number of segments behind the clitellum. The average number of overlapping segments from a sample of 14 worms was 13 (range 0–28).
- 2.
The overlap zone consists of segments from which both LGF and MGF spikes can be elicited.
- 3.
Increasing stimulus intensity in the LGF field reduces the latency of the first spike until it reaches a minimum of 6 ms. This value is used to calculate conduction velocity of afferent impulses along the sensory pathway.
- 4.
It is suggested, on the basis of conduction velocity, that the large sensory neurones in the segmental nerves are those mediating afferent events in the rapid escape response.
JOURNAL ARTICLE|
01 December 1979
The Rapid Escape Response of the Earthworm Lumbricus Terrestris L.: Overlapping Sensory Fields of the Median And Lateral Giant Fibres
M. J. MOORE
M. J. MOORE
1 Department of Anatomy, Marischal College, University of Aberdeen, Aberdeen, Scotland
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M. J. MOORE
1 Department of Anatomy, Marischal College, University of Aberdeen, Aberdeen, Scotland
Revision Received:
11 Jan 1979
Online Issn: 1477-9145
Print Issn: 0022-0949
© 1979 by Company of Biologists
1979
J Exp Biol (1979) 83 (1): 231–238.
Article history
Revision Received:
11 Jan 1979
Citation
M. J. MOORE; The Rapid Escape Response of the Earthworm Lumbricus Terrestris L.: Overlapping Sensory Fields of the Median And Lateral Giant Fibres. J Exp Biol 1 December 1979; 83 (1): 231–238. doi: https://doi.org/10.1242/jeb.83.1.231
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