Psychobiology
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Các bài báo tiêu biểu
Persistence of sham feeding after intragastric meals in the rat: Concentration-intake relations
Tập 21 Số 1 - Trang 55-59 - 1993
In rats sham fed through esophageal fistulas, responsiveness to sucrose over a range of concentrations was assessed under two conditions: immediately following a large intragastric (IG) preload of liquid diet, and after 10 h of deprivation with no preload. The preload had no reliable effect on sucrose sham feeding at any sucrose concentration. Therefore, the insensitivity of sham feeding to IG loa...... hiện toàn bộ
Effects of des-glycinamide9-[arginine8] vasopressin upon spatial memory in the hole-board search task
Tập 23 Số 1 - Trang 45-51 - 1995
The hole-board search task (HBST), a spatial learning test, was used to measure errors, working memory, reference memory, sequence, and response bias. Various dosages of desglycinamide9-[arginine8] vasopressin (DGAVP; 0.17, 0.5, 1, 3, and 10 µg) were administered in double blind experiments 1 h prior to six training sessions in the HBST. Body weight loss was a covariant in a repeated measures mult...... hiện toàn bộ
Visual object representation: An introduction
Tập 26 Số 4 - Trang 281-308 - 1998
What are the computational, behavioral, and neural mechanisms that give rise to object perception? In this review, I present a cognitive neuroscience overview of the literature on object representation. Marr’s (1982) framework for studying complex tasks is used as a guide for the review. This framework involves analyzing a problem on three levels: (1) the computational theory, which asks what is c...... hiện toàn bộ
Limited and extensive cuing inversely control spatial learning performance in fornix-damaged and nonlesioned rats
Tập 19 Số 4 - Trang 323-331 - 1991
This work examines the influence of contextual manipulations on radial maze performance in fornix-damaged and control rats by presenting the task in two differentiated contexts—limited versus extensive cuing—that were successively inverted. With limited cuing, fornix-damaged rats perform worse than controls. Extensive cuing counteracts performance deficits in lesioned rats but impairs performance ...... hiện toàn bộ
Neural activity differs between explicit and implicit learning of artificial grammar strings: An fMRI study
Tập 28 Số 3 - Trang 283-292 - 2000
Functional magnetic resonance imaging was used to investigate the neural areas underlying retrieval of implicit and explicit knowledge about letter strings. Participants studied strings formed according to an artificial grammar, then performed implicit-learning-based judgments (judging the grammatical status of the string) or explicit-learning-based judgments (recognition) on novel grammatical str...... hiện toàn bộ
Cortical-hippocampal interactions and cognitive mapping: A hypothesis based on reintegration of the parietal and inferotemporal pathways for visual processing
Tập 17 Số 3 - Trang 230-235 - 1989
Spatial navigation and the firing of hippocampal place cells can be driven as much by what an animal knows about its spatial world as by what it immediately experiences at a given location. If presented first with a set of spatially orienting cues, which are then removed during a test, navigation to a place of reward is accurate and place cells still fire in their correct locations despite the abs...... hiện toàn bộ
Arginine vasopressin facilitates reversal and impairs retention of a brightness discrimination in albino rats
Tập 15 Số 4 - Trang 329-335 - 1987
One microgram of arginine vasopressin (AVP) or a placebo was administered to male albino rats. Performance on the original learning, reversal learning, and retention of a black-white visual discrimination was assessed by means of both trials and errors to criterion. In Experiment 1, the rats were given AVP after original learning trials and prior to retention trials. In Experiment 2, the rats were...... hiện toàn bộ
Pathoclysis in aging human cerebral cortex: Evidence from in vivo MRI morphometry
Tập 21 Số 2 - Trang 151-160 - 1993
Age-related differences in the cross-sectional area and volume of selected cortical regions were examined by using in vivo magnetic resonance morphometry. In two samples—healthy volunteers and patients with negative radiological findings—similar patterns of cortical aging emerged. The size of sampled regions of association cortices correlated negatively with age, whereas no significant correlation...... hiện toàn bộ