The proposal is to test ontogenetic change in how acute ethanol ingestion affects learning, memory and stimulus selection. Recent surveys indicate substantial consumption of ethanol among children, particularly adolescents, but the consequences for learning and memory when developing children or animals are under the influence of ethanol is unknown. With emphasis on periadolescence, in compariosn with earlier and later periods, we will test with an animal model (the rat) the influence of acute ethanol as an agent of contextual control over the expression of memory, the interaction between effects of ethanol and sources of stress, the effects of ethanol on rate of forgetting, and preliminary indications that ethanol may influence what is learned rather than (or as well as) the learning process itself, perhaps especially at ceartain points in ontogency. Through-out, emphasis will be on the careful derivation of functions relating dose of ethanol with learning and memory, assessed in circumstances in which ontogenetic comparisons may be considered. Equivalency doses will be chosen to equate brain alcohol levels (BrAL) across age. The conditioning and test procedures will be rapidly conducted, equally so across agrees to enable containment of the duration of conditioning and testing within the peak BrAL for all animals at all ages. The proposed experiments address the following questions about the influence of ethanol on learning and retention at different ontogenetic periods: (1) When ethanol produes state dependent retention, how does this effect vary with age? (2) How is learning influenced by ethanol in the presence or absence of isolation stress at different ages? (3) What effect does ethanol have on rate of forgetting in animals of different ages? (4) Does ethanol influence the selection of stimuli attended to and/or learned and does this vary with age? (5) Does ethanol affect learning in the absence of reimforcers that are strong biologically significant stimuli in a manner similar to that observed when reinforcers such as footshock or food are employed, and is the relationship between such effects dependent upon ontogenetic status? (6) Does ethanol have effects on periadolescent animals that differ from those at younger or older ages, as has been observed for other drugs that alter central catecholaminergic activity and do these include effects that alter the learning and/or stimulus selection of these periadolescent animals?

Agency
National Institute of Health (NIH)
Institute
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Type
Research Project (R01)
Project #
5R01AA006634-03
Application #
3109862
Study Section
Biochemistry, Physiology and Medicine Subcommittee (ALCB)
Project Start
1988-04-01
Project End
1992-01-31
Budget Start
1990-04-01
Budget End
1992-01-31
Support Year
3
Fiscal Year
1990
Total Cost
Indirect Cost
Name
State University of NY, Binghamton
Department
Type
Schools of Arts and Sciences
DUNS #
090189965
City
Binghamton
State
NY
Country
United States
Zip Code
13902
Revillo, D A; Arias, C; Spear, N E (2013) The unconditioned stimulus pre-exposure effect in preweanling rats in taste aversion learning: role of the training context and injection cues. Dev Psychobiol 55:193-204
Arias, Carlos; Revillo, Damian Alejandro; Spear, Norman E (2012) Chronic tolerance to the locomotor stimulating effect of ethanol in preweanling rats as a function of social stress. Alcohol 46:245-52
Arias, Carlos; Spear, Norman E (2011) Mianserin, but not ondansetron, reduces the locomotor stimulating effect of ethanol in preweanling rats. Pharmacol Biochem Behav 100:81-5
Arias, Carlos; Molina, Juan Carlos; Spear, Norman E (2010) Differential role of mu, delta and kappa opioid receptors in ethanol-mediated locomotor activation and ethanol intake in preweanling rats. Physiol Behav 99:348-54
Arias, Carlos; Solari, Ana Clara; Mlewski, Estela C et al. (2010) Social isolation and stress related hormones modulate the stimulating effect of ethanol in preweanling rats. Behav Brain Res 211:64-70
Arias, Carlos; Mlewski, Estela C; Molina, Juan Carlos et al. (2009) Ethanol induces locomotor activating effects in preweanling Sprague-Dawley rats. Alcohol 43:13-23
Arias, Carlos; Mlewski, Estela Cecilia; Miller, Stacie et al. (2009) Novelty modulates the stimulating motor effects of ethanol in preweanling rats. Pharmacol Biochem Behav 92:448-56
Pepino, M Y; Kraebel, K S; Lopez, M F et al. (1998) Behavioral detection of low concentrations of ethanol in milk in the preweanling rat. Alcohol 15:337-53
Chotro, M G; Spear, N E (1997) Repeated exposure to moderate doses of alcohol in the rat fetus: evidence of sensitization to toxic and chemosensory aspects of alcohol. Alcohol Clin Exp Res 21:360-7
Chotro, M G; Kraebel, K S; McKinzie, D L et al. (1996) Prenatal and postnatal ethanol exposure influences preweanling rats' behavioral and autonomic responding to ethanol odor. Alcohol 13:377-85

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