Related Experiment Videos
Early postnatal ethanol administration does not affect prepulse inhibition in rats.
Kevin M Woolfrey1, Nicholas J Musisca, Pamela S Hunt
1Department of Psychology, College of William and Mary, P.O. Box 8795, Williamsburg, VA 23187-8795, USA.
Physiology & Behavior
|May 12, 2005
Summary
Early postnatal ethanol exposure in rats did not impair sensorimotor gating, as measured by prepulse inhibition. These findings suggest that cognitive deficits from prenatal alcohol exposure may not stem from basic sensory processing issues.
Area of Science:
- Neuroscience
- Developmental Psychology
- Toxicology
Background:
- Prenatal ethanol exposure is linked to cognitive deficits.
- The role of sensory processing deficits in these cognitive impairments remains unclear.
Purpose of the Study:
- To investigate the impact of early postnatal ethanol administration on sensorimotor gating in rats.
- To determine if deficits in prepulse inhibition contribute to cognitive impairments observed after ethanol exposure.
Main Methods:
- Rats received ethanol (5.25 g/kg) or sham-intubation from postnatal day (PD) 4-9, alongside a naive control group.
- Prepulse inhibition of the startle reflex was assessed in adolescence (PD 35) and early adulthood (PD 70).
- Sex differences in prepulse inhibition were analyzed across different interstimulus intervals (ISIs).
Main Results:
- Ethanol exposure did not affect the startle response magnitude or prepulse inhibition.
- Male rats showed greater prepulse inhibition than females at PD 35 (except 4 ms ISI).
- Female rats showed greater prepulse inhibition than males at PD 70 across all ISIs.
Conclusions:
- Early postnatal ethanol exposure in rats does not appear to impair sensorimotor gating as measured by prepulse inhibition.
- Cognitive deficits associated with early ethanol exposure may not be explained by deficits in sensorimotor gating.
- Sex-specific differences in prepulse inhibition emerge with age in rats.