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 accounts make different predictions about how this area should respond to conditioned inhibitors of reward ...

Article GUID: 38042330

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; Daccache N; Sato H; Sato T; Mogil JS; Nader K; Gkogkas CG; Iordanova MD; Prager-Khoutorsky M; McBride ...

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 long-lasting impairment in cognitive function are poorly understood. Here, we show that repeated genera ...

Article GUID: 36394958

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 maladaptive behaviors such as substance abuse or anxiety disorders. Understanding this balance require ...

Article GUID: 36336498

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

No abstract

Article GUID: 36006415

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 two individually trained cues are presented in compound to induce an expectation of a greater outco ...

Article GUID: 35932299

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 are never directly paired. That is, associative learning can occur by integrating information across ...

Article GUID: 35517574

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 other cues present during learning. This assumption has guided behavioral and neural science research f ...

Article GUID: 34376741

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 environmental cue can acquire value, through first-order and higher-order conditioning. In first-order con ...

Article GUID: 34197867

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 aversive outcomes.

Article GUID: 34033766

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 allocates attention to stimuli to enable learning. These behavioural advances have recently been followed by ...

Article GUID: 33453307

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 pairings are more common, as are situations where cues and responses are associated with multiple outcomes ...

Article GUID: 33035525