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17β-Estradiol infusions into the dorsal striatum rapidly increase dorsal striatal dopamine release in vivo.

Author(s): Shams WM, Sanio C, Quinlan MG, Brake WG

Neuroscience. 2016 08 25;330:162-70 Authors: Shams WM, Sanio C, Quinlan MG, Brake WG

Article GUID: 27256507

Robust optical fiber patch-cords for in vivo optogenetic experiments in rats.

Author(s): Trujillo-Pisanty I, Sanio C, Chaudhri N, Shizgal P

MethodsX. 2015;2:263-71 Authors: Trujillo-Pisanty I, Sanio C, Chaudhri N, Shizgal P

Article GUID: 26150997

Optogenetic Activation of the Infralimbic Cortex Suppresses the Return of Appetitive Pavlovian-Conditioned Responding Following Extinction.

Author(s): Villaruel FR, Lacroix F, Sanio C, Sparks DW, Chapman CA, Chaudhri N

Cereb Cortex. 2018 Dec 01;28(12):4210-4221 Authors: Villaruel FR, Lacroix F, Sanio C, Sparks DW, Chapman CA, Chaudhri N

Article GUID: 29045570


Title:Optogenetic Activation of the Infralimbic Cortex Suppresses the Return of Appetitive Pavlovian-Conditioned Responding Following Extinction.
Authors:Villaruel FRLacroix FSanio CSparks DWChapman CAChaudhri N
Link:https://www.ncbi.nlm.nih.gov/pubmed/29045570?dopt=Abstract
Category:Cereb Cortex
PMID:29045570
Dept Affiliation: PSYCHOLOGY
1 Center for Studies in Behavioral Neurobiology/FRQS Groupe de Recherche en Neurobiologie Comportementale, Department of Psychology, Concordia University, Montreal, Quebec, Canada.

Description:

Optogenetic Activation of the Infralimbic Cortex Suppresses the Return of Appetitive Pavlovian-Conditioned Responding Following Extinction.

Cereb Cortex. 2018 Dec 01;28(12):4210-4221

Authors: Villaruel FR, Lacroix F, Sanio C, Sparks DW, Chapman CA, Chaudhri N

Abstract

The infralimbic medial prefrontal cortex (IL) is important for suppressing learned behavior after extinction, but whether this function extends to responses acquired through appetitive Pavlovian conditioning is unclear. We trained male, Long-Evans rats to associate a white-noise conditional stimulus (CS; 10 s; 14 presentations per session) with 10% liquid sucrose (0.2 mL per CS presentation), and recorded entries into the fluid port during the CS. The CS was presented without sucrose in subsequent extinction and test sessions. Increasing IL activity with pretest microinfusions of a-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA; 0, 0.3 nmol; 0.3 µl/side) reduced the reinstatement of CS-elicited port entries. The same result was obtained when IL neurons that expressed Channelrhodopsin-2 (ChR2) were optically stimulated during CS presentations at test (473 nm, 5 ms pulses at 20 Hz for 10.2 s, unilateral). Optical stimulation of ChR2-expressing IL neurons during CS presentations also reduced spontaneous recovery and context-induced renewal. Furthermore, optical stimulation (1) during intertrial intervals had no impact on renewal, (2) depolarized ChR2-expressing IL pyramidal neurons in vitro, and (3) preferentially increased Fos in ChR2-expressing neurons. These novel converging data highlight a critical role for the IL in suppressing the return of appetitive Pavlovian-conditioned responding following extinction.

PMID: 29045570 [PubMed - in process]