Amphetamine and extinction of cued fear.

Abstract:

:Much research is focused on developing novel drugs to improve memory. In particular, psychostimulants have been shown to enhance memory and have a long history of safe use in humans. In prior work, we have shown that very low doses of amphetamine administered before training on a Pavlovian fear-conditioning task can dramatically facilitate the acquisition of cued fear. The current experiment sought to expand these findings to the extinction of cued fear, a well-known paradigm with therapeutic implications for learned phobias and post-traumatic stress disorder. If extinction reflects new learning, one might expect drugs that enhance the acquisition of cued fear to also enhance the extinction of cued fear. This experiment examined whether 0.005 or 0.05 mg/kg of D-amphetamine (therapeutic doses shown to enhance acquisition) also enhance the extinction of cued fear. Contrary to our hypothesis, amphetamine did not accelerate extinction. Thus, at doses that enhance acquisition of conditioned fear, amphetamine does not appear to enhance extinction.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Carmack SA,Wood SC,Anagnostaras SG

doi

10.1016/j.neulet.2009.10.049

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

18-22

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(09)01369-X

journal_volume

468

pub_type

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