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Thursday, August 6, 2020 | History

2 edition of Mechanisms contributing to short- and long-term sensitization in Aplysia found in the catalog.

Mechanisms contributing to short- and long-term sensitization in Aplysia

William Nelson Frost

Mechanisms contributing to short- and long-term sensitization in Aplysia

by William Nelson Frost

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  • 30 Currently reading

Published .
Written in English

    Subjects:
  • Aplysia.,
  • Gastropoda.

  • Edition Notes

    StatementWilliam Nelson Frost.
    The Physical Object
    Paginationvi, 166 leaves, bound.
    Number of Pages166
    ID Numbers
    Open LibraryOL15205271M

    Multiple Serotonergic Mechanisms Contributing to Sensitization in Aplysia: Evidence of Diverse noxious stimulus usually gives rise to short-term sensitization lasting 20–30 min, whereas four or five spaced shocks induce intermediate-term and long-term sensitization lasting 90 min andseveraldays,respectively(Pinskeretal;Castellucciand. Abstract. Cellular and molecular mechanisms of short-term memory and long-term memory are reviewed based on observations of molluscan models of Aplysia californica, Lymnaea stagnalis, and Hermissenda is generally accepted that short-term memory results from changes in the synaptic strength of preexisting neuronal connections that involve covalent modifications of preexisting Author: Manabu Sakakibara.

    A simplified preparation for relating cellular events to behavior: mechanisms contributing to habituation, dishabituation, and sensitization of the Aplysia gill-withdrawal reflex. J. Neurosci. –Cited by: II. Short-Term, Long-Term, and Ultralong-Term Forms of Learning. For this chapter we will focus on examples from the Aplysia model system. This is because in many ways the details of the specific molecular mechanisms underlying short-, intermediate-, and long-term memory are better understood in this system than in any other.

    The Aplysia gill and siphon withdrawal reflex (GSWR) is an involuntary, defensive reflex of the sea hare Aplysia californica, a large shell-less sea snail or sea reflex causes the sea hare's delicate siphon and gill to be retracted when the animal is disturbed. Aplysia californica is used in neuroscience research for studies of the cellular basis of behavior including: habituation. The facilitation contributing to short- and long-term sensitization may utilize some common mechanisms. For example, both short-term and long-term facilitation ap- pear to be induced by serotonin (5-HT) and cyclic aden- osine monophosphate (cAMP) and similar membrane channels appear to be involved in mediating short-term and long-term.


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Mechanisms contributing to short- and long-term sensitization in Aplysia by William Nelson Frost Download PDF EPUB FB2

The short-term sensitization and conditioning responses in Aplysia can occur in the presence of inhibitors of protein synthesis, suggesting that no new proteins (or cells) are required for short-term learning responses (short-term memory).

On the other hand, a series of closely spaced tail shocks (unconditioned stimulus) delivered over a few hours will produce a long-term sensitization (long-term memory Author: P.

Newman. Sensitization of the gill- and siphon-withdrawal reflex in Aplysia is thought to result from a set of molecular processes with different time courses 1: short-term sensitization is explained by cyclic AMP-dependent modulation of ion-channel function in sensory neurons lasting minutes 2 ; memory that endures for hours or longer, by the expression and Cited by: We have used the gill and siphon withdrawal reflex of Aplysia to study the morphological basis of the persistent synaptic plasticity that underlies long-term sensitization.

One critical locus for storage of the memory for sensitization is the set of monosynaptic connections between identified siphon sensory neurons and gill and siphon motor by: The same mechanisms that mediate short-term sensitization underlie long-term sensitization.

During long-term sensitization, however, this circuitry is affected for up to several weeks. The duration of this form of plasticity is evidently due to changes in gene expression and thus protein : Dale Purves, George J Augustine, David Fitzpatrick, Lawrence C Katz, Anthony-Samuel LaMantia, James.

Collectively, these data show that latent memory is induced in Aplysia by long-term sensitization training. This latent memory outlasts LTM expression by at least two days and is able to facilitate the induction of three temporally distinct phases of by: The cellular and molecular mechanisms contributing to memory storage in Aplysia have been studied most extensively for a simple withdrawal reflex of the gill and siphon (for review, see Hawkins, Mayford, & Kandel, ) ().

Aplysia has an external respiratory organ - the gill - that is covered by a sheet of skin called the mantle shelf, which ends in a fleshy spout called the : Robert D. Hawkins. Introduction. Memory and synaptic plasticity in many systems, including Aplysia and hippocampus, have different stages, which are defined primarily by their time courses but also involve different training protocols and different cellular and molecular mechanisms.

Thus, relatively weak stimulation produces short-term plasticity, which lasts minutes and involves covalent modifications in either Cited by: 2.

The marine snail Aplysia californica exhibits a simple defensive withdrawal reflex that can undergo several forms of learning. In particular, the reflex can exhibit long-term sensitization (LTS), a form of nonassociative memory. LTS is mediated by long-term facilitation (LTF) of the monosynaptic connection between the sensory and motor neurons that mediate the withdrawal : David L.

Glanzman. Habituation can exhibit both short- and long-term forms. In Aplysia the siphon-elicited gill- and siphon-withdrawal reflex can undergo habituation that persists for several weeks (Carew et al., ).Cited by: Keep NS intact, cut away most of body, leave the siphon skin & tail still connected together and to the system.

Latent memory for sensitization in Aplysia. short-term, intermediate-term, and long-term memory. Under our training conditions, the latent memory persists for at least 2 d following the decay.

A fundamental problem in neurobiology is to understand the basic processes that endow the nervous system with the ability to store and retrieve long-term memory. A related problem is to understand the relationship between the mechanisms for the induction, storage and retrieval of short-term memory and those for long-term by: 3.

David Sweatt, in Mechanisms of Memory (Second Edition), Reaction Category 2—Generation of Long Half-Life Molecules. Aplysia long-term facilitation of neurotransmitter release provides an example of our second category of memory-forming chemical reaction: generation of long half-life signaling molecules.

In this case, the duration of the memory subserved by this mechanism is. Sensitization of the gill- and siphon-withdrawal reflex in Aplysia is thought to result from a set of molecular processes with different time courses: short-term sensitization is explained by.

Which mechanism contributes to the long-term enhancement of the gill withdrawal reflex in Aplysia but is not involved in the short-term enhancement of the reflex. Activation of G-protein-coupled receptors by serotonin b.

Phosphorylation of CREB c. Activation of adenylyl cyclase d. Activation of protein kinase A e. The mechanisms underlying short-term presynaptic facilitation, the enhancement of transmitter release from sensory neurons in Aplysia, induced by serotonin (5-HT), can be divided into two.

Long-term sensitization training in Aplysia decreases the excitability of a decision-making neuron through a sodium-dependent mechanism John S.

Hernandez 1, 2, In Aplysia, long-term sensitization (LTS) occurs concurrently with a suppression of feeding. At the cellular level, the suppression of feeding is accompanied by decreased Cited by: 5. Habituation and sensitization are used to refer to underlying theoretical processes, and behavior changes are described at the response level.

Comprised of 12 chapters, this book begins with an overview of approaches, constructs, and terminology used in the study of Book Edition: 1. Synaptic plasticity and learning involve different mechanisms depending on the following: (1) the stage of plasticity and (2) the history of plasticity, or metaplasticity.

However, little is known about how these two factors are related. We have addressed that question by examining mechanisms of synaptic plasticity during short-term and intermediate-term behavioral sensitization and Cited by: Common patterns of plasticity contributing to nociceptive sensitization in mammals and Aplysia Article Literature Review (PDF Available) in Trends in Neurosciences 14(2) March with.

•Biology of Habituation: Why Sea Snails? Aplysia (invertebrates) are simple, with large unique neurons •Gill/siphon withdrawal reflex •Kandel’sAplysia research (e.g., Squire & Kandel, ) •Habituation of a gill withdrawal reflex •Repeated stimulation results in long-lasting (long-term memory?) habituation for File Size: KB.Long-term memory for sensitization in Aplysia requires new protein and RNA synthesis.

Here, we identify a late protein as calreticulin, the major Ca(2+)-binding protein of the lumen of the.Purchase Mechanisms of Memory - 2nd Edition. Print Book & E-Book. ISBN