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OFC neurons do not represent the negative value of a conditioned inhibitor

Author(s): Esber GR; Usypchuk A; Saini S; Deroche M; Iordanova MD; Schoenbaum G;

The orbitofrontal cortex (OFC) is often proposed to function as a value integrator; however, alternative accounts focus on its role in representing associative structures that specify the probability and sensory identity of future outcomes. These two accoun ...

Article GUID: 38042330


Parvalbumin interneuron loss mediates repeated anesthesia-induced memory deficits in mice

Author(s): Roque PS; Thörn Perez C; Hooshmandi M; Wong C; Eslamizade MJ; Heshmati S; Brown N; Sharma V; Lister KC; Goyon VM; Neagu-Lund L; Shen C; Dacc ...

Repeated or prolonged, but not short-term, general anesthesia during the early postnatal period causes long-lasting impairments in memory formation in various species. The mechanisms underlying lon ...

Article GUID: 36394958


The Recruitment of a Neuronal Ensemble in the Central Nucleus of the Amygdala During the First Extinction Episode Has Persistent Effects on Extinction Expression

Author(s): Lay BPP; Koya E; Hope BT; Esber GR; Iordanova MD;

Background: Adaptive behavior depends on the delicate and dynamic balance between acquisition and extinction memories. Disruption of this balance, particularly when the extinction of memory loses control over behavior, is the root of treatment failure of ma ...

Article GUID: 36336498


Correction to: Persistent disruption of overexpectation learning after inactivation of the lateral orbitofrontal cortex in male rats

Author(s): Lay BPP; Choudhury R; Esber GR; Iordanova MD;

No abstract

Article GUID: 36006415


Experimental chambers Persistent disruption of overexpectation learning after inactivation of the lateral orbitofrontal cortex in male rats

Author(s): Lay BPP; Choudhury R; Esber GR; Iordanova MD;

Rationale and objective: Learning to inhibit acquired fear responses is fundamental to adaptive behavior. Two procedures that support such learning are extinction and overexpectation. In extinction, an expected outcome is omitted, whereas in overexpectation ...

Article GUID: 35932299


Understanding Associative Learning Through Higher-Order Conditioning

Author(s): Gostolupce D; Lay BPP; Maes EJP; Iordanova MD;

Associative learning is often considered to require the physical presence of stimuli in the environment in order for them to be linked. This, however, is not a necessary condition for learning. Indeed, associative relationships can form between events that ...

Article GUID: 35517574


Agency rescues competition for credit assignment among predictive cues from adverse learning conditions

Author(s): Kang M; Reverte I; Volz S; Kaufman K; Fevola S; Matarazzo A; Alhazmi FH; Marquez I; Iordanova MD; Esber GR; ...

A fundamental assumption of learning theories is that the credit assigned to predictive cues is not simply determined by their probability of reinforcement, but by their ability to compete with oth ...

Article GUID: 34376741


Mechanisms of higher-order learning in the amygdala

Author(s): Gostolupce D; Iordanova MD; Lay BPP;

Adaptive behaviour is under the potent control of environmental cues. Such cues can acquire value by virtue of their associations with outcomes of motivational significance, be they appetitive or aversive. There are at least two ways through which an enviro ...

Article GUID: 34197867


Threat perception: Fear and the retrorubal field

Author(s): Bradfield LA; Iordanova MD;

A new study has found that neurons within a structure of the rat midbrain known as the retrorubral field show diverse responses to stimuli that signal different levels of threat, as well as a separate pattern of diverse responses to differentially predicted ...

Article GUID: 34033766


Neural substrates of appetitive and aversive prediction error.

Author(s): Iordanova MD, Yau JO, McDannald MA, Corbit LH

Prediction error, defined by the discrepancy between real and expected outcomes, lies at the core of associative learning. Behavioural investigations have provided evidence that prediction error up- and down-regulates associative relationships, and allocate ...

Article GUID: 33453307


Adaptive behaviour under conflict: deconstructing extinction, reversal, and active avoidance learning.

Author(s): Manning EE, Bradfield LA, Iordanova MD

In complex environments, organisms must respond adaptively to situations despite conflicting information. Under natural (i.e. non-laboratory) circumstances, it is rare that cues or responses are consistently paired with a single outcome. Inconsistent pairin ...

Article GUID: 33035525


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