Perceptual spatial position induces the attentional enhancement of prepulse inhibition and its neural mechanism.
Dorsocentral striatum, Attentional modulation
Perceptual spatial position
Prepulse inhibition
Journal
Hearing research
ISSN: 1878-5891
Titre abrégé: Hear Res
Pays: Netherlands
ID NLM: 7900445
Informations de publication
Date de publication:
07 2022
07 2022
Historique:
received:
04
10
2021
revised:
14
04
2022
accepted:
23
04
2022
pubmed:
3
5
2022
medline:
7
6
2022
entrez:
2
5
2022
Statut:
ppublish
Résumé
Prepulse inhibition (PPI) is a sensorimotor gating process that reduces the startling response when a weaker sensory stimulus precedes a sudden startling stimulus. Perceptual spatial separation (PSS) between the prepulse and the background noise was found to enhance PPI compared to perceptual spatial co-location (PSC). However, little is known about the perceptual characteristics of prepulses in the PSS that induce more inhibition of the startling response and the associated neural mechanism. The dorsocentral striatum (DCS) was the convergence of spatial information from the cortical and thalamic circuits. Our study investigated whether the perceptual spatial position of prepulses induced spatial attentional modulation of PPI. In addition, whether the DCS was involved in spatial attentional modulation's neural circuits of PPI. In our study, the relative perceptual image positions of the prepulse and masker were controlled by the playback time difference between the two loudspeakers, i.e., PSS and PSC. The specific spatial attention of the prepulse was conditioned by foot shock. The results revealed that PPI was generally enhanced after fear conditioning/conditioning-control manipulation across all rats. Further enhancement of PPI in the PSS condition occurred only in the fear conditioning position, not in the conditioning-control position. We first found that PPI did not show specific spatial enhancement in the drug-blocking bilateral DCS rats with 2 mM kynurenic acid. These results demonstrated that the perceptual spatial position modulated the spatial attention of prepulse and improved PPI. DCS was involved in the attentional modulation neural circuits of PPI and processed spatial information of prepulse.
Identifiants
pubmed: 35501198
pii: S0378-5955(22)00080-6
doi: 10.1016/j.heares.2022.108511
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
108511Informations de copyright
Copyright © 2022 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Competing Interest No conflicts of interest, financial or otherwise, are declared by the authors.