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Updated: May 25, 2026
11:17
Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
Published on: August 24, 2012
Methylphenidate enhances extinction of contextual fear
Antony D Abraham1, Christopher L Cunningham, K Matthew Lattal
1Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, 97239, USA. abrahaan@ohsu.edu
Learning & Memory (Cold Spring Harbor, N.Y.)
|January 19, 2012
Summary
Methylphenidate (MPH) enhances fear extinction retention in mice when administered before or after extinction training. This finding suggests MPH could aid behavioral therapies for fear disorders.
Area of Science:
- Neuroscience
- Behavioral Pharmacology
Background:
- Methylphenidate (MPH) is a norepinephrine and dopamine transporter blocker used for ADHD and narcolepsy.
- Limited research exists on MPH's effects on fear extinction, despite its role in fear acquisition.
Purpose of the Study:
- To investigate the effect of Methylphenidate (MPH) on the extinction and retention of contextual fear in mice.
- To determine if MPH administration timing and dosage influence fear extinction.
Main Methods:
- C57BL/6 mice were administered varying doses of MPH (2.5-40 mg/kg) before or after contextual fear extinction sessions.
- Freezing behavior, an indicator of fear, was measured during extinction and subsequent tests.
Main Results:
- MPH administration before extinction decreased freezing during the session, with a 10 mg/kg dose showing persistence to the next day.
- Post-extinction MPH administration resulted in dose-dependent reductions in freezing.
- The timing and duration of the extinction session influenced MPH's effectiveness.
Conclusions:
- Methylphenidate (MPH) can enhance fear extinction retention in a dose- and time-dependent manner.
- MPH's effects are sensitive to the duration of the extinction session.
- MPH may be a valuable adjunct to behavioral therapies for treating fear-related disorders.
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