Background and Objective: Temporal lobe epilepsy (TLE) usually leads to memory deficit. In this study, we tried to assess the effect of Withania somnifera extract on the impaired learning and memory in the intrahippocampal kainate model of TLE in the rat. Materials & Methods: Male rats (n=32) were divided into sham, extract+sham, kainite, and kainite+extract. For induction of epilepsy, unilate...

introduction: lead (pb) is a neurotoxin that its different effects on the central nervous system are well-known. previous studies have reported the potent effects of vitamin c on memory.the present study was undertaken to evaluate the protective effects of vitamin c against leadinduced amnesia. methods: male wistar rats were divided into 4 groups: the control (saline), negative control (lead), ...

The hippocampus, a region implicated in the processing of spatial information and episodic memory, is central to the debate concerning the relationship between episodic and semantic memory. Studies of medial temporal lobe amnesic patients provide evidence that the hippocampus is critical for the retrieval of episodic but not semantic memory. On the other hand, recent neuroimaging studies of int...

it is important for people to improve cognitive and motor performance. the purpouse of this study was to investigate the effect of running on treadmill in spatial memory and learning and motor performance. 24 albino-wistar healthy male rats were randomly divided into control and activity groups. activity group ran 7 days on treadmill (speed 22m/min 30 minutes a day). after the end of activity p...

background and objective: tamoxifen is one of the selective estrogen receptor modulators that exerts estrogen / anti-estrogen effects in various tissues. this study was done to evaluate the effect of chronic administration of tamoxifen on spatial memory and passive avoidance task in adult male wistar rats. methods: in this experimental study, 48 adult male wistar rats were randomly divided into...

Lesion and neuroimaging studies suggest that the orbitofrontal cortex (OFC) supports temporal aspects of episodic memory. However, it is unclear whether OFC contributes to the encoding and/ or retrieval of temporal context and whether it is selective for temporal relative to non-temporal (spatial) context memory. We addressed this issue with two complimentary studies: functional magnetic resona...

Background and Objective: It is well known that stress and glucocorticoid, modulate memory processing, though the result is completely dependent on the time of stress induction. This study investigated the effect of acute corticosterone administration on memory retrieval of recent and remote memory in a 4 trials/day (low- intensity learning) or 8 trials/ day (high- intensity learning) Morris wa...

Lesion and neuroimaging studies suggest that orbito-frontal cortex (OFC) supports temporal aspects of episodic memory. However, it is unclear whether OFC contributes to the encoding and/or retrieval of temporal context and whether it is selective for temporal relative to nontemporal (spatial) context memory. We addressed this issue with two complimentary studies: functional magnetic resonance i...

Introduction: Kisspeptin-13 (KP-13) is a novel endogenous factor, increases synaptic transmission and is involved in several behavioral functions such as anxiety, locomotion, epilepsy and avoidance learning. However, the role of this peptide on cognition has not been well clarified yet. Here we studied the effect of kisspeptin-13 pretreatment on spatial learning and also interaction with cholin...

Imaging, electrophysiological studies, and lesion work have shown that the medial temporal lobe (MTL) is important for episodic memory; however, it is unclear whether different MTL regions support the spatial, temporal, and item elements of episodic memory. In this study we used fMRI to examine retrieval performance emphasizing different aspects of episodic memory in the context of a spatial na...