The action of the eyecup muscles of the crab, Carcinus, during optokinetic movements
Burrows, M.; Horridge, George Adrian
Description
Summary 1. The actions of the nine eyecup muscles of the crab during horizontal optokinetic movements are described. 2. Each muscle includes a wide spectrum of fibre types, ranging from phasic, with sarcomere lengths of 3-4 µm., through intermediate, to tonic fibres with sarcomeres of 10-12 µm. Each muscle receives at least one slow and one fast motoneuron, but no inhibitory supply. The slow axons predominantly innervate the tonic muscle fibres while the fast axons innervate the phasic...[Show more]
dc.contributor.author | Burrows, M. | |
---|---|---|
dc.contributor.author | Horridge, George Adrian | |
dc.date.accessioned | 2019-09-17T02:44:32Z | |
dc.date.available | 2019-09-17T02:44:32Z | |
dc.identifier.issn | 0022-0949 | |
dc.identifier.uri | http://hdl.handle.net/1885/170485 | |
dc.description.abstract | Summary 1. The actions of the nine eyecup muscles of the crab during horizontal optokinetic movements are described. 2. Each muscle includes a wide spectrum of fibre types, ranging from phasic, with sarcomere lengths of 3-4 µm., through intermediate, to tonic fibres with sarcomeres of 10-12 µm. Each muscle receives at least one slow and one fast motoneuron, but no inhibitory supply. The slow axons predominantly innervate the tonic muscle fibres while the fast axons innervate the phasic ones. 3. Slow movement and the position of the eyecup in space are controlled by the frequency of slow motoneuron discharges. All muscles collaborate at every position. The phasic system is recruited during rapid eyecup movements of large amplitude. 4. In optokinetic nystagmus the exact form of the impulse sequences are described for each muscle. They are the consequence of a visually driven central programme which takes no account of the movement which it generates. Movements in opposite directions involve different central programmes; the one is not merely the reverse of the other. There is no effective proprioceptive feedback from the eyecup joint or from muscle tension receptors. | |
dc.format.extent | 28 pages | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | Company of Biologists | |
dc.rights | © 1968 The Company of Biologists Ltd | |
dc.source | Journal of Experimental Biology | |
dc.subject | eyecup muscle | |
dc.subject | crab Carcinus | |
dc.subject | optokinetic movement | |
dc.subject | nine | |
dc.subject | axon | |
dc.subject | slow | |
dc.subject | receptor | |
dc.title | The action of the eyecup muscles of the crab, Carcinus, during optokinetic movements | |
dc.type | Journal article | |
local.description.notes | At the time of publication the author was affiliated with the Gatty Marine Laboratory and Department of Natural History University of St Andrews, Scotland. | |
local.identifier.citationvolume | 49 | |
dc.date.issued | 1968-10-01 | |
local.publisher.url | https://www.biologists.com/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Horridge, George Adrian, Division of Biomedical Science and Biochemistry, CoS Research School of Biology, The Australian National University | |
local.identifier.essn | 1477-9145 | |
local.bibliographicCitation.issue | 2 | |
local.bibliographicCitation.startpage | 223 | |
local.bibliographicCitation.lastpage | 250 | |
dcterms.accessRights | Open Access | |
dc.provenance | http://sherpa.ac.uk/romeo/issn/0022-0949/ Author can archive publisher's version/PDF. Publisher's version/PDF may be used (Sherpa/Romeo as of 17/9/2019) | |
Collections | ANU Research Publications |
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