Excitation and habituation of crayfish escape. 1969.
نویسنده
چکیده
This paper describes one of the first attempts to analyze the synaptic basis for the release of an animal’s fixed action pattern, which controls a behavior such as the crayfish escape response. It is also one of the early demonstrations that the neural mechanisms of a simple form of learning, known as habituation, are located in the central synapses of the neural circuit that produced the behavior.
منابع مشابه
Excitation and habituation of the crayfish escape reflex: the depolarizing response in lateral giant fibres of the isolated abdomen.
Crayfish commonly evade capture by darting backwards when one tries to pick them up or otherwise disturbs them. They do this by sharply flexing the abdomen, the tail fan acting as a paddle; at the same time they streamline themselves by thrusting their appendages forward. Like many other escape and startle reflexes throughout the animal kingdom, this one is exceedingly labile. A crayfish held b...
متن کاملSocial status-dependent modulation of LG-flip habituation in the crayfish.
Strong stimuli applied to the tailfan of the crayfish Procambarus clarkii evoked lateral giant interneurone (LG)-mediated tailflips. When the sensory stimulus was applied repeatedly, the response of the LG habituated until it failed to give rise to a spike. We found that this LG-flip habituation was dependent on social status. With a short interstimulus interval of 5 s, the rate of habituation ...
متن کاملRostral ganglia are required for induction but not expression of crayfish escape reflex habituation: role of higher centers in reprogramming low-level circuits.
It is widely assumed that learning results from alterations in the strength of synapses within the neural pathways that mediate a learned behavioral response and that these alterations are directly caused by training-induced activity of neurons connected by the changing synapses. Initial evidence for this view came from studies of habituation of defensive reflexes in several invertebrate specie...
متن کاملCrayfish escape behavior and central synapses. II. Physiological mechanisms underlying behavioral habituation.
responsible for exciting the lateral giant neuron and initiating single tail flips in response to phasic mechanical stimuli to the tail of crayfish. It was shown that the excitation of some tactile interneurons by tactile afferents antifacilitates extensively at low repetition rates. This phenomenon must be presumed to contribute to the habituation of the response. It is not clear, however, tha...
متن کاملSensitization of the crayfish lateral giant escape reaction.
Most behavioral reactions that habituate can also be dishabituated by strong stimuli. In the best studied cases, dishabituation seems to be the result of an independent "sensitization" of the behavioral reaction that compensates for habituation without necessarily abolishing it. Crayfish lateral giant (LG) neuron-mediated escape reactions are one of the most fully analyzed behavioral reactions ...
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عنوان ژورنال:
- The Journal of experimental biology
دوره 212 Pt 6 شماره
صفحات -
تاریخ انتشار 2009