Combined kinematic and electromyographic analyses of proleg function during crawling by the caterpillar Manduca sexta

被引：0

作者：

Jim H. Belanger

Barry A. Trimmer

机构：

[1] Department of Biology,

[2] Tufts University,undefined

[3] Medford,undefined

[4] MA 02155,undefined

[5] USA,undefined

[6] Present address: Department of Biological Sciences,undefined

[7] 508 Life Sciences Building,undefined

[8] Louisiana State University,undefined

[9] Baton Rouge,undefined

[10] LA 70803,undefined

[11] USA,undefined

[12] e-mail: jimb@lsu.edu,undefined

[13] Tel.: +1-225-3884623,undefined

[14] Fax: +1-225-3882597,undefined

来源：

Journal of Comparative Physiology A | 2000年 / 186卷

关键词：

Insect Locomotion Central pattern generator;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The planta retractor muscles in the prolegs of Manduca sexta caterpillars are a frequently-used model system for investigating a number of problems in neurobiology. We have combined kinematic and electromyogram analysis of proleg movements during crawling to examine the roles of these muscles during normal behavior. We found that retractor muscle activity is highly stereotyped, and that the primary function of these muscles is to disengage the crochets at the tip of the proleg for the swing phase of crawling. The duration of activity of the muscles was tightly coupled to the phasing of crawling behavior. The stepping patterns of animals changed to accommodate variations in the substrate, but the relative timing of retractor muscle activity was unaffected. There were no clear correlations between the various properties of motoneuronal input to the muscle (duration of activity, number of spikes, peak frequency of spikes) and the resulting muscle length change. Perhaps because it functions partially as a hydrostat, this may represent a neuromuscular system in which a significant part of the control algorithm is embedded in its morphology.

引用

页码：1031 / 1039

页数：8