NDLI: Cardiovascular component of the context signal memory in the crab Chasmagnathus

Content Provider	Springer Nature Link
Author	Hermitte, Gabriela Maldonado, Héctor
Copyright Year	2005
Abstract	Research on diverse models of memory in vertebrates demonstrates that behavioral, autonomic and endocrine responses occur together during fear conditioning. With invertebrates, no similar studies have been performed despite the extensive study of fear memory paradigms, as the context signal memory (CSM) of the crab Chasmagnathus granulatus, usually assessed by a behavioral parameter. Here, we study the crab’s CSM, considering both the behavioral response and the concomitant neuroautonomic adjustments resulting in a heart rate alteration. Results show that upon the first presentation of the visual danger stimulus, a heart arrest followed by bradycardia is triggered together with a conspicuous escape response. The latter declines throughout training, while heart arrests become sporadic and bradycardia tends to deepen along the session. At test, 24 h after training, the outcome clearly contrasts with that shown at training, namely, stimulus presentation in the same context induces lower escape, no heart arrests and quick suppression of bradycardia. These results support the view that the same memory process brings about the changes in both responses. High escape, heart arrest and bradycardia are considered three parameters of the unconditioned response while minor escape, no heart arrests and bradycardia attenuation are three parameters of the learned response.
Starting Page	69
Ending Page	83
Page Count	15
File Format	PDF
ISSN	03407594
Journal	Journal of Comparative Physiology A
Volume Number	192
Issue Number	1
e-ISSN	14321351
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-09-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Crustacea Heart rate Neuroautonomic adjustments Conditioned emotional response Memory Zoology Neurosciences Animal Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Behavioral Neuroscience Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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