Crayfish Muscle Receptor Organ: Role in Regulation of Postural Flexion

Recordings were made from postural-control motor nerves with antagonistic functions in the crayfish abdomen through flexible suction electrodes. During unrestrained flexion of the abdomen, output from the tonic stretch receptor neuron of RM$_{1}$ (SR$_{1}$) is sufficient to drive an extensor motor u...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1972-02, Vol.175 (4022), p.647-650
Main Authors: Page, Charles H., Sokolove, Phillip G.
Format: Article
Language:English
Subjects:
Abdomen
Abdomen - innervation
Action Potentials
Animals
Astacoidea
Babinski reflex
Electric Stimulation
Electrodes
Innervation
Mechanoreceptors - physiology
Messenger RNA
Motor ability
Motor neurons
Motor Neurons - physiology
Muscle Contraction
Nerves
Neurons
Posture
Reflex
Reflexes
Space life sciences
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Description
Summary:Recordings were made from postural-control motor nerves with antagonistic functions in the crayfish abdomen through flexible suction electrodes. During unrestrained flexion of the abdomen, output from the tonic stretch receptor neuron of RM$_{1}$ (SR$_{1}$) is sufficient to drive an extensor motor unit in the same segment. However, this intrasegmental "resistance" reflex is normally blocked by an intersegmental reflex in which output from SR$_{1}$'s in caudal segments inhibits SR$_{1}$ discharge in more anterior segments.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.175.4022.647