The perirhinal cortex (PRh) and its cholinergic inputs are implicated in object recognition memory. Conversely, the hippocampus (HPC) may be involved in spatial recognition processes that are not essential to the recognition of objects per se. Systemic nicotine has been shown to facilitate both object and spatial memory. The current study compared the roles of perirhinal and hippocampal nicotinic acetylcholine receptors (nAChRs) in object and spatial recognition memory using spontaneous object recognition (SOR) and object-location (OL) tasks for rats. Systemic pre-sample (acquisition) nicotine administration dose-dependently facilitated SOR and OL performance compared to vehicle conditions in which performance was at chance with a 72-h retention delay between the sample and choice phases. Subsequently, pre-sample intra-PRh infusions of nicotine significantly facilitated SOR; somewhat surprisingly, pre-sample intra-HPC nicotine also enhanced object recognition memory. Further experiments indicated facilitative effects on OL performance caused by pre-sample intra-PRh or intra-HPC nicotine administration. These results not only demonstrate that nAChR activation facilitates performance on object recognition and object-location memory tasks, but suggest that these effects can be produced by nAChR action in either PRh or HPC. Thus, although PRh and HPC are not required for OL or SOR task performance, respectively, nAChR-mediated enhancement of neural function in either of these temporal lobe regions appears capable of promoting stronger memory encoding and/or consolidation in either task. These findings further support the supposed interactive relationship between the HPC and PRh in object information processing and highlight the potential therapeutic value of nicotinic receptor activation in amnesic disorders.
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http://dx.doi.org/10.1016/j.neuropharm.2012.01.008 | DOI Listing |
Psychol Res
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Brain and Cognition, KU Leuven, Leuven, Belgium.
Researchers in numerical cognition have extensively studied the number sense-the innate human ability to extract numerical information from the environment quickly and effortlessly. Much of this research, however, uses abstract stimuli (e.g.
View Article and Find Full Text PDFSci Rep
December 2024
Department of Psychology, Jagiellonian University, ul. Ingardena 6, 30-060, Kraków, Poland.
Mirror-invariance enables recognition of mirrored objects as identical. During reading acquisition, sighted readers must overcome this innate bias to distinguish between mirror-inverted letters ('d' vs. 'b').
View Article and Find Full Text PDFJ Xray Sci Technol
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School of Electrical and Information Engineering, Tianjin University, Nankai District, Tianjin, China.
Background: Airport security is still a main concern for assuring passenger safety and stopping illegal activity. Dual-energy X-ray Imaging (DEXI) is one of the most important technologies for detecting hidden items in passenger luggage. However, noise in DEXI images, arising from various sources such as electronic interference and fluctuations in X-ray intensity, can compromise the effectiveness of object identification.
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College of Big Data and Intelligent Engineering, Southwest Forestry University, Kunming 650224, China.
Walnuts possess significant nutritional and economic value. Fast and accurate sorting of shells and kernels will enhance the efficiency of automated production. Therefore, we propose a FastQAFPN-YOLOv8s object detection network to achieve rapid and precise detection of unsorted materials.
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Department of Anatomy, Histology and Embryology, Medical Faculty, Medical University Plovdiv, 4002 Plovdiv, Bulgaria.
Epilepsy is a common brain function disorder. The present study aims to evaluate the long-term effect of perampanel (PRM) and lacosamide (LCM), administered singly in a high-dose or in a low-dose combination of both, on comorbid anxiety, cognitive impairment, BDNF, and Cyclin D1 hippocampal expression in an experimental model of temporal lobe epilepsy with lithium-pilocarpine. PRM (3 mg/kg, p.
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