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PubMed1980

Feeding schedules and the circadian organization of behavior in the rat.

Feeding and drinking behavior of rats maintained in constant light were recorded before, during and after feeding schedules with periods lying within or outside the range of circadian entrainment. Regardless of period, all schedules immediately resulted in the partial or complete synchronization of drinking behavior, but failed to entrain the free-running circadian feeding and drinking rhythms. This indicated that drinking can be passively driven by periodic access to food. However, other results suggested that a separate circadian system was entrained by feeding schedules: First, the 24-h periodicity induced by 24-h feeding schedules often continued for several days after termination of the schedules. Second, the rats showed anticipatory activity under schedules with periods within, but not outside, the circadian range of entrainment. Third, lesions of the suprachiasmatic nuclei (SCN), which resulted in the immediate elimination of free-running rhythms, did not alter the rhythmic influences of the feeding schedules. These results provide evidence for the participation of two distinct circadian systems in the control of behavior in the rat. The two systems appear to have different entrainment characteristics and separate physiological substrates.

Adrenal Cortex Hormones↗

PubMed1977

[Alcohol consumption, alcohol abuse, and subjective feeling: a representative inquiry in the Federal Republic of Germany].

The investigation was carried out in a representative sample of subjects of the Federal Republic of Germany, including West Berlin (n = 1952). The subjects were 20--64 years old. The following were investigated: 1. Social and abusive drinking patterns 2. Relations between drinking behavior and sociodemographic data 3. Relations between drinking behavior and subjective feeling. Of the subjects, 47% consumed alcohol daily or several times a week, 6% called themselves teetotallers. Beer was the preferred beverage. The drinking behavior varied among income classes and vocational groups. Of the whole sample, 8% drank regularly whilst working; 25% of the skilled workers did so. Comparing alcohol consumption and subjective feeling, there was a slight association between elevated mood and frequent alcohol consumption. Of the subjects, 4% were identified as alcohol misusers (7% of the males, 1% of the females). Persons at high risk were men living alone (especially widowed and divorced subjects) and persons of medium income. Regular consumers of hard liquor were at higher risk than consumers of beer or wine. The highest percentage of misuse was found among unskilled and skilled workers and among inhabitants of large cities. There was a slight association between high alcohol misuse index and depressive states, subjective complaints, and paranoid attitudes.

Adult↗

PubMed1991

Changes in ingestive behavior induced by intracranial injection of spermine.

Effect of intracranial injection of spermine on feeding and drinking behavior was studied in rats. A significant and long-term suppression of feeding and drinking behavior appeared when 30 nmol/hemisphere of spermine was bilaterally injected into the lateral hypothalamic area, substantia nigra or ventral noradrenergic bundle. Micro-injected spermine into the medial amygdaloid nucleus produced a weak and short-time but significant suppression of ingestive behavior. On the other hand, a significant increase in feeding and drinking behavior was observed when spermine was injected into the ventromedial hypothalamic nucleus. These results suggest that spermine inhibits neuronal activity of all the brain regions studied here.

Animals↗

PubMed2000

Couples' drinking patterns, intimate partner violence, and alcohol-related partnership problems.

PURPOSE: Past research has revealed a strong correspondence between alcohol use and family dysfunction (e.g., Straus and Gelles in 1986 and 1990). Unfortunately, much of this research has relied on reports from only one family member. METHODS: Here, we present the results from a recent, nationwide study of alcohol-consumption patterns, alcohol-related partnership problems, and intimate partner violence (IPV) based on reports from both romantic partners of 1,615 married and cohabiting couples. RESULTS: Using the "drinking partnerships" construct developed by Roberts and Leonard in 1997, we found that despite considerable concordance between couple members' drinking behaviors, discrepant drinking patterns were strongly predictive of relational distress and the incidence of physical violence. IMPLICATIONS: These findings suggest that the interaction between couple members' alcohol-related behaviors has crucial implication for the health and well-being of the entire family.

Adolescent↗

PubMed2003

Anxiety and alcohol abuse disorders: a common role for CREB and its target, the neuropeptide Y gene.

It has been hypothesized that anxiety disorders play an important role in the initiation and maintenance of alcohol drinking behaviors. However, the molecular mechanisms for the association between anxiety and alcohol abuse are not well understood. Structures of the extended amygdala, particularly the central nucleus of amygdala, are involved in anxiety and in motivational aspects of alcohol drinking behaviors. Here, I propose that cAMP response element-binding protein (CREB) has a role in anxiety and alcohol drinking behaviors. The CREB gene transcription factor regulates the expression of the gene encoding neuropeptide Y (NPY), and decreased concentrations of NPY are implicated in anxiety and alcohol drinking behaviors. Therefore, decreased function of CREB in the central nucleus of the amygdala might regulate anxiety and alcohol intake via decreased expression of NPY, and might provide a common link between anxiety and alcohol abuse disorders. I also suggest that, via CREB, NPY might interact with other CREB target genes, such as the gene encoding brain-derived neurotrophic factor, and that this CREB-mediated interaction might be important in the regulation of anxiety and alcohol drinking behaviors.

Alcoholism↗

PubMed1996

Sex differences in alcohol preference and drinking patterns emerge during the early postpubertal period.

Young male and female Sprague-Dawley rats (30 days old) were assigned randomly to three treatment groups: (1) alcohol treatment--received beer with 5% ethanol added, food, and water ad libitum; (2) pair-fed treatment--received nonalcoholic beer plus sucrose and food to match intake by the alcohol-treated animals; and (3) control treatment--received food and water ad libitum. Animals were tested for alcohol preference for 24 hr and then received their assigned treatments for a period of 30 days, followed by a period of abstinence before alcohol preference testing again at 74 days of age. Males given free access to beer and water did not drink large quantities of beer. Females given free access to beer and water drank a lot of beer on the first day, but decreased intake until approximately 52 days of age. A developmental change in young female rats at approximately 52 days of age resulted in increased voluntary ethanol intake, possibly caused by hormonal changes associated with the establishment of estrous cycles. When the animals were tested for alcohol preference at 74 days of age after a period of abstinence, males and females in the pair-fed group had greater alcohol preference than animals in the other groups. Females in the pair-fed group had greater alcohol intake based on body weight than males in the pair-fed group and males and females in all other groups. These results provide insight into sex differences in the development of voluntary drinking behavior and responses of drinking behavior to the early stress of pair-feeding.

Age Factors↗

PubMed1997

The structure of problem drinking in adulthood: a confirmatory approach.

OBJECTIVE: The structure of problem drinking in young adults was examined using confirmatory factor analyses to test three models of the relations among measures of drinking behavior, coping functions of drinking and alcohol-related problems. Model 1 was based on the notion that the relations among the variables would be accounted for by two correlated factors, drinking behavior and alcohol problems. Underlying Model 2 was the hypothesis that a more parsimonious, single factor model could be used to represent the data. Model 3 hypothesized two orthogonal factors, a general factor and a residual problems factor, representing a reconceptualization of the structure of problem drinking. METHOD: Data were obtained from surveys of a sample of university graduates (178 women, 84 men) at two points in time and from a community sample of young adults (411 women, 347 men). RESULTS: Results of the analyses indicated that, although the relations among the variables could be adequately accounted for by any of the three models tested, the data were best fit by Model 3. CONCLUSIONS: Model 3 appeared to be most useful to furthering our understanding of the structure of problem drinking, one that, according to the results obtained in this work, is similar for women and men.

Adaptation, Psychological↗

PubMed2003

Micro1-opioid antagonist naloxonazine alters ethanol discrimination and consumption.

The endogenous opioid system is implicated in excessive ethanol-drinking behavior. However, the role of individual opioid receptor subtypes in the mechanism underlying excessive ethanol-drinking behavior is not yet well understood. Therefore, we investigated the ability of a selective micro1-opioid antagonist, naloxonazine, to modulate ethanol-drinking behavior and ethanol discrimination in a rat model with the use of ethanol self-administration and drug discrimination paradigms. The effects of naloxonazine (0.001-10 mg/kg) on ethanol intake were examined in Sprague-Dawley rats under conditions of limited access to 10% (wt./vol.) ethanol and ad libitum access to food and water. Pretreatment with high doses of naloxonazine (1-10 mg/kg) significantly reduced ethanol consumption. When the effects of naloxonazine on food intake in free-feeding male rats were examined, naloxonazine (1.8-10 mg/kg) significantly suppressed 24-h food intake. Another group of rats was trained to discriminate ethanol (1.25 g/kg, i.p.) from saline on a fixed-ratio schedule (FR 10), and ethanol dose-response tests were conducted once rats had acquired ethanol-saline discrimination. Injections were given 15 min before ethanol dose-response tests were conducted, and after characterization of the ethanol dose-response curve, the effects of naloxonazine on ethanol discrimination were assessed by administering naloxonazine (0.001-10 mg/kg, i.p.) 15 min before ethanol administration. Treatment with naloxonazine (0.001-1.8 mg/kg, i.p.) before the ED(100) dose of ethanol partially antagonized the discriminative stimulus of ethanol without having any effect on the response rate. The results support the suggestion of involvement of micro1-opioid receptors in the discriminative effects of ethanol and ethanol-drinking behavior.

Alcohol Drinking↗

PubMed1987

Smokers and drinkers in a health maintenance organization population: lifestyles and health status.

This study examines, among a large health maintenance organization population, the prevalence of two high-risk lifestyle practices (smoking and problem drinking), their interrelationships, and their relationships with other lifestyle practices, sociodemographic characteristics, and health status measures. Results, based on a random sample of 1,133 adults, showed that smoking and problem drinking are strongly correlated. Individuals with no drinking problems had an age-, sex-, and education-adjusted smoking prevalence of approximately 20%, while problem drinkers smoked at about twice that rate. In addition, reporting one type of problem drinking behavior (binge, chronic, or drinking and driving) at least doubled, and in one instance increased by sixfold, the likelihood of reporting another type of problem drinking behavior. Smokers and problem drinkers were more likely to be younger than age 65, to be irregular seat belt users (smokers and binge drinkers only), and not to belong to voluntary organizations. Results of the analysis suggest that detection, prevention, and treatment of drug use, in general, might prove more beneficial than only focusing on smoking and problem drinking. In addition, because binge drinking and drinking and driving were so widespread among younger age groups, it might prove more beneficial to consider preventive strategies that change the sale and distribution of alcohol and make the environment safer in which to drink, such as providing transportation to get drinkers back home.

Adult↗

PubMed2006

Alcohol, employment status, and social benefits: one more piece of the puzzle.

OBJECTIVES: To examine the role of employment status and the receipt of social benefits in the prediction of alcohol use. METHODS: Logistic regression models were used to analyze panel data from the National Survey of Families and Households (NSFH) 1987-88 and 1991-92. A total of 7,599 respondents who were older than 16 years of age in 1987 and did not have a physical or mental condition were included in the analysis. The alcohol measures were (a) total number of drinks in the past 30 days; and (b) having 5 or more drinks in a day, 4 or more days in the past 30 days. RESULTS: Employed welfare recipient women have a greater likelihood of heavy drinking than other full-time employed. We do not find evidence of an association between not being employed (with or without benefits) and greater likelihood of engaging in heavy drinking behaviors. Alcohol drinking among other employment groups is not significantly different, with the exception of retired men who drink less. CONCLUSION: It is important to focus attention on women working while receiving welfare, and who may need help maintaining their jobs.

Age Factors↗

PubMed1980

Compulsive water drinking treated with high dose propranolol.

A patient with recurrent, life-threatening water intoxication secondary to compulsive water drinking is described. This patient responded well to nearly 1 g of propranolol daily with a decrease in her drinking behavior, reduced sensation of thirst, and a reduction in her delusional thinking. The rationale for the choice of propranolol with this patient is reviewed.

Adult↗

PubMed1980

Outcome with alcoholics seeking treatment voluntarily or after confrontation by their employer.

Treatment results with 370 alcoholics who sought treatment after being threatened with dismissal by their employers were compared with results with 58 alcoholics who sought treatment voluntarily. Data indicated that voluntary clients were experiencing significantly greater problems in a wide range of psychosocial areas when they entered treatment than were mandatory clients, whereas mandatory clients had a poorer work record in terms of productivity and drinking behavior interfering with work. After treatment, however, there were few differences between the groups in terms of psychosocial behavior, work performance and drinking behavior. The results suggest that coercion is a useful tool in inducing alcoholics to seek treatment, since outcome with mandatory clients is similar to that with voluntary clients and since it is likely that few of the mandatory clients would have sought treatment without pressure from their employers.

Adult↗

PubMed1999

Social resources and alcohol-related losses as predictors of help seeking among male problem drinkers.

OBJECTIVE: This study examined whether factors other than severity of alcohol-related problems add to the explanation of seeking help for drinking problems. METHOD: Help seeking was investigated by comparing male problem drinkers who applied for treatment with male chronic problem drinkers in the general population. Subjects were selected from an outpatient treatment center (n = 129) and from a panel of the general population (n = 86) in the Netherlands. A shortened version of Cahalan's problem-drinking index, including symptoms, social consequences, health problems and frequency of intoxication, was used to indicate the severity of problem drinking. It was hypothesized that in particular drinking problems that indicate losses (social consequences and health problems) were associated with help seeking. Furthermore, resources such as paid work, a spouse, high socioeconomic status, younger age and a "wet" social network were expected to facilitate the continuation of drinking behavior and drinking problems and the avoidance of help seeking. RESULTS: Social and health consequences were associated more strongly with seeking help than were symptoms of problem drinking and intoxication. The effects of type of alcohol-related problem, employment and age were as hypothesized. However, the hypotheses about marital status, socioeconomic status and social network characteristics could not be confirmed. CONCLUSIONS: The results suggest that in particular employed men and men of a younger age deserve attention with regards to detecting problem drinking and targeting prevention.

Adolescent↗

PubMedDate not supplied

High-risk drinking among college fraternity members: a national perspective.

This survey, with its 85% response rate, provides an extensive profile of drinking behaviors and predictors of drinking among 3,406 members of one national college fraternity, distributed across 98 chapters in 32 states. Multiple indexes of alcohol consumption measured frequency, quantity, estimated blood alcohol concentration levels (BACs), and related problems. Among all members, 97% were drinkers, 86% binge drinkers, and 64% frequent binge drinkers. On the basis of self-reports concerning the 4 weeks preceding the time of survey, the authors found that members drank on an average of 10.5 days and consumed an average of 81 drinks. Drinkers had an average BAC of 0.10, reaching at least 0.08 on an average of 6 days. These fraternity members appear to be heavier drinkers than previously studied fraternity samples, perhaps because they were more representative and forthright. All 6 preselected demographic attributes of members and 2 chapter characteristics were significantly related to the drinking behaviors and levels of risk, identifying possible targets for preventive interventions.

Alcoholism↗

PubMed1982

[Determination of the development of psychotic dependence to drugs in small animals. 4. Selective drinking of barbital and ethanol solutions by mice].

Using mice, preference for barbital or ethanol solution was examined in choice test between drug solution and tap water after pretreatment with the drugs for 6, 15 or 30 days under different conditions, a) forcedly given the drug solution as drinking liquid. b) ip injected the drug twice daily, c) combined treatment, forced drinking plus ip injection. Pretreatment with barbital induced aversion to the drug solution regardless the conditions of pretreatments mainly because the unpalatability of the drug solution and also the unpleasant effect of injected drug. In ethanol pretreated animals, pre-exposure to ethanol solution decreased the preference ratio for the drug solution n choice test but accustomed to the taste in parallel with the duration of the pretreatment. After treatment with injection, on the other hand, animals acquired preference for ethanol solution indicating the reinforcing effect of the injected drug. Six days pretreatment with the drugs developed tolerance to their suppressive effect and in barbital treated animals physical dependence was also developed. However, the degree of preference or drug solution was not parallel to the intensity of tolerance or physical dependence. Characteristics of the test drugs as reinforcer of drinking behavior was easily determined by this method and its validity for the screening of the drugs of psychic dependence liability was suggested.

Animals↗

PubMed1986

Effect of skeleton photoperiod and food availability on the circadian pattern of feeding and drinking in rats.

Feeding and drinking behavior were measured in rats maintained under a 12:12 light-dark (LD) cycle or skeleton photoperiod (SPP). Feeding and drinking were closely associated during the normal LD cycle but under SPP conditions an increased feeding activity during the subjective day was not accompanied by an equivalent increment of water intake. This indicates a stronger coupling of drinking to the subjective night. A restriction of food availability to the subjective light phase did not cause an accompanying complete shift in drinking behavior. These results suggest that drinking is largely dependent on the influence of a circadian oscillator and this association is not disrupted by changes in feeding schedule. A change in food access to the subjective light phase caused partial but not permanent desynchronization between feeding and drinking behavior. Synchrony was reestablished within one day once food was available ad lib. Complete return to the original feeding and drinking patterning took 3 days. It is suggested that separate slave oscillators controlling feeding and drinking are governed by a hypothesized "master" circadian oscillator which remains definitely entrained to the original rhythm by the light pulses of the SPP condition.

Animals↗

PubMed2005

A latent class analysis of underage problem drinking: evidence from a community sample of 16-20 year olds.

The aim of this paper is to shed light on the nature of underage problem drinking by using an empirically based method to characterize the variation in patterns of drinking in a community sample of underage drinkers. A total of 4056 16-20-year-old current drinkers from 212 communities in the US were surveyed by telephone as part of the National Evaluation of the Enforcing Underage Drinking Laws (EUDL) Program. Latent class models were used to create homogenous groups of drinkers with similar drinking patterns defined by multiple indicators of drinking behaviors and alcohol-related problems. Two types of underage problem drinkers were identified; risky drinkers (30%) and regular drinkers (27%). The most prominent behaviors among both types of underage problem drinkers were binge drinking and getting drunk. Being male, other drug use, early onset drinking and beliefs about friends drinking and getting drunk were all associated with an increased risk of being a problem drinker after adjustment for other factors. Beliefs that most friends drink and current marijuana use were the strongest predictors of both risky problem drinking (OR=4.0; 95% CI=3.1, 5.1 and OR=4.0; 95% CI=2.8, 5.6, respectively) and regular problem drinking (OR=10.8; 95% CI=7.0, 16.7 and OR=10.2; 95% CI=6.9, 15.2). Young adulthood (ages 18-20) was significantly associated with regular problem drinking but not risky problem drinking. The belief that most friends get drunk weekly was the strongest discriminator of risky and regular problem drinking patterns (OR=5.3; 95% CI=3.9, 7.1). These findings suggest that underage problem drinking is most strongly characterized by heavy drinking behaviors which can emerge in late adolescence and underscores its association with perceptions regarding friends drinking behaviors and illicit drug use.

Adolescent↗

PubMed1984

Role of the suprachiasmatic nuclei in the circadian timing system of the squirrel monkey. II. Light-dark cycle entrainment.

The role of the suprachiasmatic nuclei (SCN) in light-dark (LD) cycle entrainment in the squirrel monkey (Saimiri sciureus) was evaluated by continuously monitoring core body temperature and drinking behavior in both intact and SCN-lesioned animals exposed to different LD conditions. In a 24-h LD cycle with 12 h of light per day (LD 12:12), both intact and SCN-lesioned monkeys had a prominent rhythm in body temperature with an acrophase 6.51 +/- 0.36 h (intact) or 5.12 +/- 0.42 h (SCN-lesioned) after light onset. In a 23-h LD cycle composed of 1 hr of light and 22 h of dark (LD 1:22), the temperature rhythm in both intact and SCN-lesioned monkeys became synchronized with the 23-h period of the LD cycle. Studies examining the effects of LD cycle exposure on the temporal pattern of drinking behavior indicated that both intact and SCN-lesioned monkeys confined their drinking to the daily period of light. Each monkey was subsequently exposed to an LD cycle with 6 h of bright light and 18 h of darkness or dim background illumination (i.e. 60:0, 66:6 and 76:16 lux cycles). In intact monkeys systematic increases in the average intensity of the daily LD cycle produced corresponding delays in the phase of the daily offset of drinking behavior but did not alter the basic 24-h rhythmicity in the behavior. In contrast, increasing the intensity of the 24-h LD cycle in SCN-lesioned monkeys produced no delay in the daily termination of drinking, but instead produced a disintegration in the 24-h rhythm of drinking behavior.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗