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Related Experiment Video

Updated: Jun 6, 2026

A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration
09:16

A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration

Published on: January 22, 2016

Extended access to methamphetamine self-administration affects sensorimotor gating in rats.

Martin Hadamitzky1, Athina Markou, Ronald Kuczenski

  • 1Department of Psychiatry, University of California San Diego, La Jolla, CA 92093, USA. m.hadamitzky@pharmtox.vetmed.uni-muenchen.de

Behavioural Brain Research
|November 13, 2010
PubMed
Summary

Methamphetamine (METH) abuse impairs sensorimotor gating, crucial for information processing. Rats showed disrupted gating only after continuous, high-dose METH exposure, not acute intake, suggesting chronic abuse drives deficits.

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Area of Science:

  • Neuroscience
  • Psychopharmacology
  • Behavioral Science

Background:

  • Neuropsychiatric disorders often involve disturbed information processing, linked to impaired sensorimotor gating.
  • Methamphetamine (METH) abuse is associated with cognitive deficits and psychosis-like symptoms.

Purpose of the Study:

  • To investigate METH-induced impairment of sensorimotor gating in rats using an escalating dose intravenous self-administration (IVSA) procedure.
  • To determine if METH's effect on gating relates to acute drug levels or chronic exposure patterns.

Main Methods:

  • Rats underwent weekly METH IVSA with extended access (1, 3, 6 hours).
  • Prepulse inhibition (PPI) of the acoustic startle response (ASR) was assessed after each access period.
  • Drug intake and PPI were monitored across escalating METH exposure.

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Main Results:

  • Rats escalated METH intake over extended access periods.
  • Disruption of sensorimotor gating (PPI deficits) was observed only after the 6-hour METH access period.
  • Impaired gating correlated with continuous, higher-dose exposure rather than acute drug levels.

Conclusions:

  • METH-induced sensorimotor gating deficits are linked to chronic, high-dose exposure patterns, not transient drug presence.
  • The IVSA escalating dose model effectively mimics human METH abuse patterns.
  • This model offers insights into stimulant-induced cognitive and behavioral deficits relevant to human neuropsychiatric conditions.