Reversal Learning (Latest Articles)

Latest indexed articles for 'Reversal Learning'

Articles 161 to 170 of 200:

Contingency tracking during unsignaled delayed reinforcement.

30 Aug 2007 Three experiments were conducted with rats in which responses on one lever (labeled the functional lever) produced reinforcers after an unsignaled delay period that reset with each response during the delay. Responses on a second, nonfunctional, ...
rec_pub_17970417-contingency-tracking-unsignaled-delayed-reinforcement.htm

Estradiol and corticosterone independently impair spatial navigation in the Morris water maze in adult female rats.

23 Aug 2007 The independent effects of ovarian and adrenal hormones on spatial place learning were examined in male and female Long-Evans hooded rats. Experimental groups received bilateral ovariectomy (females only) and adrenalectomy (both sexes), followed by ...
rec_pub_17913254-estradiol-corticosterone-independently-impair-spatial-navigation.htm

Postischemic administration of Z-Ligustilide ameliorates cognitive dysfunction and brain damage induced by permanent forebrain ischemia in rats.

22 Aug 2007 Previous studies have demonstrated that Z-Ligustilide (LIG), a characterized phthalide constituent present in numerous medical Umbelliferae plants, has significant neuroprotective effects in transient forebrain ischemia and permanent cerebral focal ...
rec_pub_17889286-postischemic-administration-z-ligustilide-ameliorates-cognitive.htm

Difficulty overcoming learned non-reward during reversal learning in rats with ibotenic acid lesions of orbital prefrontal cortex.

12 Aug 2007 Behavioral flexibility is a concept often invoked when describing the function of the prefrontal cortex. However, the psychological substrate of behavioral flexibility is complex. Its key components are allocation of attention, goal-directedness, ...
rec_pub_17698991-difficulty-overcoming-learned-non-reward-reversal-learning-rats.htm

Reconciling the roles of orbitofrontal cortex in reversal learning and the encoding of outcome expectancies.

12 Aug 2007 Damage to orbitofrontal cortex (OFC) has long been associated with decision-making deficits. Such deficits are epitomized by impairments in reversal learning. Historically, reversal learning deficits have been linked to a response inhibition ...
rec_pub_17698988-reconciling-roles-orbitofrontal-cortex-reversal-learning-encoding.htm

Object categorization: reversals and explanations of the basic-level advantage.

30 Jul 2007 People are generally faster and more accurate to name or categorize objects at the basic level (e.g., dog) relative to more general (animal) or specific (collie) levels, an effect replicated in Experiment 1 for categorization of object pictures. To ...
rec_pub_17696693-object-categorization-reversals-explanations-basic-level-advantage.htm

Combined but not individual administration of beta-adrenergic and serotonergic antagonists impairs water maze acquisition in the rat.

23 Jul 2007 This study examined the effects of serotonergic depletion and beta-adrenergic antagonism on performance in both visible platform and hidden platform versions of the water maze task. Male Long-Evans rats received systemic injections of ...
rec_pub_17653108-combined-individual-administration-beta-adrenergic-serotonergic.htm

Serial reversal learning and acute tryptophan depletion.

18 Jul 2007 Cognitive flexibility (i.e. the ability to adapt goal-directed behaviour in response to changed environmental demands) has repeatedly been shown to depend on the prefrontal cortex (PFC). Recent data from primate studies moreover show that depletion ...
rec_pub_17714800-serial-reversal-learning-acute-tryptophan-depletion.htm

Schizophrenia patients show impaired response switching in saccade tasks.

Jul 2007 Action control deficits of schizophrenia patients result from frontostriatal brain abnormalities and presumably reflect an impairment of selective cognitive processes. This study aimed at dissociating two different levels of action control in ...
rec_pub_17698280-schizophrenia-patients-impaired-response-switching-saccade-tasks.htm

Occasion setting of timing behavior.

29 Jun 2007 Rats were trained on a temporal switching discrimination, with 2 features, A and B, signaling 2 target conditioned stimuli, x and y; feature offset and target onset were separated by a 5-s feature-target interval, and all target stimulus ...
rec_pub_17620031-occasion-setting-timing-behavior.htm

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