Research reportAcetylcholine modulates averaged sensory evoked responses and perforant path evoked field potentials in the rat dentate gyrus
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Activation of dominant hemisphere association cortex during naming as a function of cognitive performance in mild traumatic brain injury: Insights into mechanisms of lexical access
2017, NeuroImage: ClinicalCitation Excerpt :The findings of a pair of in vitro and in silico studies indicate that top-down control enhances the expression of stimulus generated transient local gamma frequency activity (attractor states) in supragranular layers, but only in the presence of cholinergic modulation, increasing neuronal activation (Roopun et al., 2010; Lee et al., 2015). Additionally, Ach exhibits direct effects on the amplitude of evoked/event related responses, generally facilitating an increase in amplitude at physiological levels, especially when baseline amplitudes are relatively low (Wang et al., 1999; Knot et al., 2014; Foster and Deadwyler, 1992). Cholinergic systems can be damaged as a result of TBI (Shin and Dixon, 2015) and the premorbid/developmental or post-concussive status of Ach system function could have a substantial impact on the overall magnitude of early task-related activation of neocortex as well as on the appropriate activation and suppression of specific linguistic representations during lexical access.
Long-term ginsenoside administration prevents memory loss in aged female C57BL/6J mice by modulating the redox status and up-regulating the plasticity-related proteins in hippocampus
2011, NeuroscienceCitation Excerpt :Additionally, estrogen enhances LTP in the hippocampus, which is a postulated model for the synaptic changes that may underlie learning and memory (Adams et al., 2001; Brann et al., 2007). In addition, Tom C. Foster et al. have reported the changes of acetylcholine, intrastriatal D2 receptor, and immediate early gene expressions in aged mice (Foster and Deadwyler, 1992; Mennicken et al., 1995; Abrous et al., 1996). In order to thoroughly understand the beneficial effect of ginsenoside on learning and memory, it would be necessary in future research to show the effect of ginsenoside on the estrous cycle of mice and to record the total distance or movement speeds in open-field test to exclude the effect of ginsenoside on the locomotor ability.
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