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Results 351 - 400 of 658
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Plata-Salamán C R - - 1992
Interferons (IFNs) are immunomodulators with neuromodulatory activities. To study the effects of IFNs on the central regulation of feeding, rats were subjected to various applications. The results show the following. 1) Intracerebroventricular microinfusion of rat IFN (15-225 IU/rat) decreased short-term (2-h) food intake in rats. Computerized analysis of behavioral patterns ...
Stephan F K - - 1992
Reentrainment of anticipatory activity (AA) after phase shifts of food access was studied in rats with lesions of the suprachiasmatic nuclei. Eight- or 10-h phase delays of feeding time resulted in delaying transients of AA. Twelve-h phase shifts and some 10-h phase advances resulted in rapid reentrainment (2-3 days) without ...
McCullough L D - - 1992
Two experiments were undertaken to investigate the role of accumbens dopamine (DA) in food-related motor activities. Although presentation of large amounts of food elicits feeding behavior, periodic food presentation (PFP; e.g. a 45-mg pellet every 45 s) induces considerable locomotion, rearing and other motor activities in food-deprived rats. In the ...
Ramirez I - - 1992
Two strains of rats (Charles River CD and Lewis) were fed high-moisture (71% water) diets containing 50-300 mg acarbose/kg dry diet for 1-3 wk. Acarbose impaired carbohydrate digestion in both strains, as evidenced by increased fecal excretion and increased intestinal contents. For both strains the highest dose of acarbose tended ...
Cooper R A - - 1992
Development of nymphs and oocyte maturation in adults were examined in Blattella germanica (L.) reared on three commercial diets. Nymphs fed rat food developed significantly faster than nymphs fed two commercial dog foods. Similarly, oocytes matured more quickly in adult females that were raised on rat food than in females ...
Lapchak P A - - 1992
Effects of chronic intraventricular administration of recombinant human brain-derived neurotrophic factor (rhBDNF) or recombinant human nerve growth factor (rhNGF) on presynaptic hippocampal cholinergic function in adult rats with partial fimbrial transections were measured. Partial fimbrial transections reduced synaptosomal high affinity choline uptake, choline acetyltransferase activity, and [3H] acetylcholine synthesis by ...
Shimomura Y - - 1992
This study was undertaken to investigate changes in feeding behavior and ambulatory activity, in rats with D-galactosamine (D-GAL)-induced hepatic failure. D-GAL was administered (1000 mg/kg) IP at 1800, just before the dark phase. The first significant decrease of ambulatory activity in rats with hepatic failure was observed between 0000 and ...
Watanabe K - - 1992
The present study investigated the application of female rats with activity stress as an animal model for anorexia nervosa. Young female rats were singly housed in activity-wheel cages with food-restricted schedule (2, 3, or 4 h of food availability per day) for 3 weeks. Estrous cycle, body weight, food intake, ...
Pal G K - - 1992
Bilateral lesions of nucleus septal lateralis resulted in a sustained and significant increase in water intake, without any change in food intake. Intracerebral injection of dopamine (DA) or of spiperone (a central D2-receptor antagonist) did not elicit any change in water or food intake. The polydipsia resulting from septal lesions ...
Goto S - - 1992
Total colectomy, mucosal proctectomy and ileo-endorectal pull-through (IEP) have been carried out mostly in dogs, because of high mortality after IEP in rats. This report evaluates the effects of elemental diet on bodily metabolism and survival following IEP in the rat. Survival at 4 weeks was 100% in the sham ...
Molloy D - - 1992
An experimental radiopaque resin root canal sealer was tested for tissue biocompatibility in rat connective tissue. The controls were four widely used sealers: Sealapex, Kerr's sealer, AH-26, and Roth's sealer. Polyethylene tubes were filled with the sealers and allowed to set for 24 hours in 100% humidity. Each sealer was ...
Beck C H - - 1992
Excessive drinking, in rats made polydipsic on intermittent delivery of food pellets, is inversely related to the time the rat spends with its head in the feeder, early in the interfood interval. In a sensitization model, this explains why food textures that induce more oral activity, e.g., powder, do not ...
Ahlersová E - - 1992
The effect of various photoperiods on circadian rhythms of chosen parameters was investigated in laboratory rats. SPF male Wistar rats were adapted for six weeks to artificial light-dark cycles (LD 8:16, 12:12, 16:8). The light was switched on at 07.00 h in all regimens. The rats were killed at 3-hour ...
Das S - - 1992
Stevioside and rebaudioside A, two intense natural sweeteners, that are constituents of the South American plant Stevia rebaudiana, were tested for cariogenicity in albino Sprague-Dawley rats. Sixty rat pups colonized with Streptococcus sobrinus were divided into four groups and fed stevioside, rebaudioside A or sucrose added to basal diet 2000 ...
Steketee J D - - 1992
We have previously demonstrated that depletion of forebrain norepinephrine (NE) led to an attenuation of neophobia in a novel environment, as defined by a greater preference for novel food over familiar food. To study further the role of forebrain NE in neophobia we chronically infused noradrenergic receptor ligands or forskolin ...
Mistlberger R E - - 1992
Rats anticipate a fixed daily feeding time by entrainment of a component of their multioscillatory circadian system. The range of stimuli capable of entraining this component is little studied. Previous studies suggest that restricted water access is not an effective entrainment stimulus, as measured by general locomotion. The present study ...
Tordoff M G - - 1991
In separate experiments, rats with open gastric cannulas were sham-fed either 32% sucrose solution or 15% corn oil emulsion. The rats' cannulas were then closed, and food intake was measured for 2 h. Food intake was greater after sham-feeding either fluid than after tests when no fluid was available. These ...
Bray G A - - 1991
The present studies have examined the hypothesis that food intake and sympathetic activity are inversely related. Following lateral hypothalamic lesions, food intake decreases and sympathetic activity rises. When pair-gained animals are used, the sympathetic activity of the LH-lesioned animals is above that of ad lib fed controls, and the sympathetic ...
Mandavilli U - - 1991
We describe a novel technique for complete and continuous bladder urine collection in conscious unrestrained rats. After urethral ligation, a silastic catheter is placed through a flexible steel tether, tunneled subcutaneously from the posterior neck area to a suprapubic incision, and inserted and fixed into the exposed urinary bladder. The ...
Furuse M - - 1991
The effect of dietary sorbose on food and water consumption was investigated in growing rats. Rats (26-day old) were fed diets containing 0, 100, 200 or 300 g sorbose/kg diet for 5 weeks in Experiment 1. Daily food and water intakes were measured at day 0, 7, 14, 21, 28 ...
Gulati K - - 1991
The effects of opioid agonists, morphine (MOR) and ketocyclazocine (KCZ), and antagonists, naltrexone (NALTX) and Mr2266, were investigated on food intake under various conditions, i.e., during light and dark phases of diurnal cycle and free-fed and fasting states in rats. NALTX showed a greater anorexic effect during dark phase, whereas ...
Spanheimer R - - 1991
Malnutrition is associated with defects in connective tissue metabolism such as altered growth and wound healing. Because collagen is the major protein in most tissues, we determined the threshold for induction of altered collagen production by partial food restriction in rats. Groups of animals were fasted 2 or 4 d ...
Dial J - - 1991
Total food intake and intake of discrete dietary components, carbohydrate, fats, and protein, throughout pregnancy and lactation were measured in the albino rat, with virginal rats acting as controls. The dietary components were isocaloric and presented in a self-selection situation. Although the reproductive subjects ate more carbohydrate, protein, and total ...
Muralidhara D V - - 1991
Food consumption patterns were studied during ad-libitum feeding of rats undernourished for 21 or 60 days after birth. Rats undernourished for 21 days consumed less food than the controls on a whole animal basis. But the food intake was higher during the early part of ad-libitum feeding when expressed on ...
Whishaw I Q - - 1991
We observed the movements of rats (Rattus norvegicus) after they had eaten food pellets of various size or hardness. With rooted hindlegs, they made head scans, with vibrissae in contact with the substrate, that began over the area below where they had eaten and then expanded to include almost the ...
Goto S - - 1991
Ileo- or jejuno-endorectal pull-through following total colectomy (TC) and massive small bowel resection (SBR) was performed in the rat to investigate the natural course of its condition. Animals were assigned to five experimental groups: TC only (n = 6), TC + 25% SBR (n = 6), TC + 50% SBR ...
Whishaw I Q - - 1991
Reaching for food by rats, with the limb contralateral to limb area motor cortex damage, was analyzed using end-point scores, videoanalysis, and Eshkol-Wachmann Movement Notation (EWMN). End point results from groups of rats with small, medium, and large lesions showed reaching success and amount of food grasped per reach decreased ...
Zaporowska H - - 1991
1. Male Wistar rats were given, for four weeks, a limited amount of food, or the amount of food and water equal to that consumed by rats drinking solely an aqueous solution of ammonium metavanadate instead of water (AMV) of 0.3 mg V/cm3 concentration. 2. In rats with limited access ...
Akiyama Y - - 1991
An experimental psychological study was undertaken to assess the effect of a change in dietary habit upon behavioural development, using as a laboratory animal male Wistar rats maintained on natural foods and a processed food. Forty male Wistar rats were weaned at 21 days of age and divided into two ...
Scalera G - - 1991
The experiments reported here attempted to examine in two groups of rats the effects on the taste preferences, food and fluid intake, energy balance and body weight gain of corticocerebellar lesions involving, primarily, the Lobulus VI (LVI) or the Lobulus Paramedianus (LP). The results showed that the lesions of LVI ...
Albert D J - - 1991
Castrated male rats (N = 27) with medial hypothalamic lesions or sham lesions were placed on a 23-h food-deprivation schedule and adapted to a highly palatable liquid food. They were also given two tests of defensiveness toward an experimenter. All animals were then housed in medial hypothalamic lesion/sham lesion pairs ...
Hernandez L - - 1990
Fluctuations of cortical dopamine during feeding were examined by in vivo microdialysis. Dopamine (DA), 3,4-dihydroxyphenylacetic acid (DOPAC), and homovanillic acid (HVA) were measured by high performance liquid chromatography and electrochemical detection. Food-deprived rats were trained to eat by pressing a bar for food when a light and a feeder were ...
Mistlberger R E - - 1990
Twenty-four hour schedules of restricted food availability entrain a component of the circadian activity rhythm in rats via a food-entrainable pacemaker separate from the light-entrainable pacemaker. The effect of aging on food-entrained circadian rhythms was examined in 6 rats maintained on a restricted diurnal feeding schedule from age 3-21 months ...
Pandhari S R SR Department of Neurophysiology, National Institute of Mental Health and Neuro Sciences, - - 1990
It was aimed to study the effects of lesions of a self-stimulation (SS) area of one region of brain on the SS of another region, and on feeding behaviour in adult Wistar rats (males). The two regions proposed for study were the lateral hypothalamus (LH) and the substantia nigra-ventral tegmental ...
Thiels E - - 1990
In this study, litters of rat pups and their mothers were continuously video-monitored from Day 14 to Day 35 postpartum in order to describe the behavioral changes that occur during that period. Prior to the onset of solid food intake (Day 18), pups spent most of their active time suckling. ...
Mittleman G - - 1990
The sequential occurrence of licking, locomotor activity, entries into the food magazine (panel pressing), and nonreenforced lever pressing engendered by a periodic schedule of food presentation were measured in each 60-s interreenforcement interval in normal and brain-damaged rats. The development of these responses was measured over 20 days in different ...
Joyamma V - - 1990
Urolithiasis, following implantation of Zn discs in urinary bladder (foreign body insertion technique), was examined in albino rats of either sex. Marked variation was observed between sex, regarding the formation of bladder stones. Ethylene glycol (1%) mixed in drinking water for 4 weeks, was unable to augment Zn disc-induced stone ...
Tsujii S - - 1990
Glucose, 2-deoxyglucose, phlorizin, and insulin were injected into the third ventricle of lean and fatty rats, and food intake recorded hourly for the next 6 h. In the lean rats, there was a significant but unimpressive decrease in food intake after the intraventricular injection of glucose, but there was no ...
Jias L M - - 1990
Thirty female albino rats were implanted with subcutaneous pellets releasing nicotine or amphetamine in order to study the effects of chronic pharmacological treatment on food intake and body weight. The pellets were removed after tolerance (a decrease in anorectic properties of the drugs) had developed. Nicotine administration produced a specific ...
Friedman M I - - 1990
Administration of methyl palmoxirate (MP; 10 mg/kg po), an inhibitor of carnitine palmitoyltransferase I (CPT I), increased the food intake of rats maintained on a diet high in triglycerides comprised of long-chain fatty acids, which require CPT I for mitochondrial uptake and oxidation. MP did not affect food intake in ...
Trojniar W - - 1990
The purpose of the experiment was to map an area involved in the regulation of food and water intake within the region of the lateral hypothalamus (LH), the adjacent subthalamus and antero-ventral midbrain. The strategy was to make a series of electrolytic lesions, varying in size and localization and to ...
Sandström R - - 1990
This investigation has addressed the question whether food and water intake, motor activity and tumour growth are influenced by indomethacin in experimental cancer. Growing rats implanted with a methylcholanthrene-induced sarcoma were studied in metabolic cages connected to a computer. Food intake, water consumption and motor activity were continuously recorded over ...
Fujimura A - - 1990
The present study was undertaken to examine whether influences of furosemide on biochemical parameters vary with its time of administration in Wistar rats. Rats were maintained under conditions of light (0700-1900 hrs) and dark (1900-0700 hrs). Furosemide (30 mg/kg) or vehicle (5% glucose) was given orally at 1000 hrs (day ...
Swiergiel A H - - 1990
The serotonin antagonist pizotifen (BC-105) is prescribed as an appetite and weight enhancer (Mosegor--Wander, also commercialized under brand names Sanmigran or Sandomigran--Sandoz, Switzerland) for anorectic and convalescent humans. There has been, however, difficulty in demonstrating any orexigenic effect of pizotifen in laboratory animals. In the present report, the influence of ...
Pettersson L G - - 1990
The role of defined descending pathways in the control of forelimb movements in cats was investigated in behavioural experiments. The movements studied were "target-reaching" (i.e. the movement used to reach for food) and "food-taking" (i.e. the movement used for grasping a piece of food and for bringing it to the ...
Koopmans H S HS Dept of Medical Physiology, University of Calgary, Alberta, - - 1990
Parabiotic pairs of inbred Lewis rats had two different types of crossed intestinal surgery performed. In the one-way surgery, food was lost from the duodenum of one rat in a pair into a 30 cm segment of upper small intestine of its partner. The unabsorbed intestinal chyme returned to the ...
Phelps M T - - 1989
We studied central-place foraging in rats (Rattus norvegicus) by placing food items that varied in size and weight at the ends of a 4-arm radial maze. In Experiments 1-3, rats increasingly tended to carry food to the center of the maze as the size of those items increased. Very large ...
Ruis J F - - 1989
Rats subjected to Eat-Fast (EF) cycles show food-anticipatory rhythms independent from the suprachiasmatic nuclei (SCN). These rhythms do not persist during subsequent ad lib feeding (EE). There are indications for a recovery of rhythmicity during fasting (FF) using a 'memory' paradigm in which FF sessions are alternated with EE. In ...
Tomoyasu N - - 1989
The role of palatability, novelty, and food aversion in determining changes of food choice after ablation of the area postrema and caudal-medial aspect of the nucleus of the solitary tract (AP/cmNTS) is examined through a series of studies utilizing 24-h, two-food choice tests. On test days, the food that the ...
Thombre D P - - 1989
Central effects of insulin on 20 min. food intake were studied in rats. Insulin administration in the lateral ventricular cerebrospinal fluid (CSF) did not alter food intake in the intact or lesioned ventromedial hypothalamus (VMH) rats. Whereas, after insulin injection in VMH there was a decrease in food intake. In ...
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