The giant neurone system in ophiuroids

1981 ◽  
Vol 219 (1) ◽  
Author(s):  
J.L.S. Cobb ◽  
T.R. Stubbs
Keyword(s):  
Giant Neurone

Structure and Function of the Lateral Giant Neurone of the Primitive Crustacean Anaspides Tasmaniae

1979 ◽  
Vol 78 (1) ◽  
pp. 121-136
Author(s):  
GERALD E. SILVEY ◽  
IAN S. WILSON
Keyword(s):  
Action Potentials ◽  
Tactile Stimulation ◽  
Large Diameter ◽  
Whole Body ◽  
Giant Fibre ◽  
Single Action ◽  
Giant Neurone ◽  
And Function ◽  
Thoracic And Abdominal ◽  
Stimulation Of

The syncarid crustacean Anaspides tasmaniae rapidly flexes its free thoracic and abdominal segments in response to tactile stimulation of its body. This response decrements but recovers in slightly more than one hour. The fast flexion is evoked by single action potentials in the lateral of two large diameter fibres (40 μm) which lie on either side of the cord. The lateral giant fibre is made up of fused axons of 11 neurones, one in each of the last 5 thoracic and 6 abdominal ganglia. The soma of each neurone lies contralateral to the axon. Its neurite crosses that of its counterpart in the commissure and gives out dendrites into the neuropile of each hemiganglion. The lateral giant neurone receives input from the whole body but fires in response only to input from the fourth thoracic segment posteriorly. Both fibres respond with tactile stimulation of only one side. Since neither current nor action potentials spread from one fibre to the other, afferents must synapse with both giant neurones. The close morphological and physiological similarities of the lateral giant neurone in Anaspides to that in the crayfish (Eucarida) suggest that the lateral giant system arose in the ancestor common to syncarids and eucarids, prior to the Carboniferous.

The giant neurone system in ophiuroids

1981 ◽  
Vol 220 (2) ◽  
Author(s):  
T.R. Stubbs ◽  
J.L.S. Cobb
Keyword(s):  
Giant Neurone

Further mapping of the Achatina giant neurone types sensitive to the neuroactive peptides isolated from invertebrates

1995 ◽  
Vol 26 (8) ◽  
pp. 1701-1708 ◽  
Author(s):  
Yoko Araki ◽  
Guo Jun Liu ◽  
Wei Zhang ◽  
Hiroshi Takeuchi ◽  
Eisuke Munekata
Keyword(s):  
Giant Neurone ◽  
Neuroactive Peptides

The giant neurone system in ophiuroids

1982 ◽  
Vol 226 (3) ◽  
Author(s):  
J.L.S. Cobb ◽  
T.R. Stubbs
Keyword(s):  
Giant Neurone
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