Neuropsychological consequences of cerebellar. Hippocampus Infantile amnesia Long-term potentiation N-methyl-D-aspartate receptor Protein phosphatase 2B. dentate gyrus volumes in PBTS may reflect damage that impairs hippocampal function at the level of encoding. Altogether, these findings suggest that developmental immaturity of the maintenance mechanisms for E-LTP is linked to the occurrence of IA. Pharmacological blockade of GluN2B-containing NMDARs or PP2B effectively restored deficits of E-LTP and long-term memory retention observed in P20 mice. We also found that the levels of calcium/calmodulin-dependent protein kinase II α autophosphorylation at Thr286, GluA1 phosphorylation at Ser831, and PKMζ protein biosynthesis occurred during the ensuing maintenance of E-LTP were significantly lower in P20 than P60 mice. The protein levels of GluN2B subunit of N-methyl-D-aspartate receptors (NMDARs), protein kinase Mζ (PKMζ), and protein phosphatase 2B (PP2B) in hippocampal CA1 region were significantly higher in P20 than P60 mice. Different kinds of memory Childhood Amnesia Childhood (infantile) amnesia Not being able to remember things from early childhood. If the appearance of Infantile amnesia is a consequence of high levels of neurogenesis, and according to the recent study of McGreevy et al. P20 mice exhibited attenuated basal excitatory synaptic transmission and early-phase long-term potentiation (E-LTP) at Schaffer collateral-CA1 synapses compared to P60 mice, but conversely, P20 mice have a greater susceptibility to induce time-dependent reversal of LTP by low-frequency afferent stimulation than P60 mice. The percentage of CA1 pyramidal neurons expressing phosphorylated cAMP-responsive element-binding protein after fear conditioning was significantly lower in P20 than P60 mice. The develop- ment of neuronal connections, or synaptogenesis, is a. Using hippocampus-dependent object-location memory and contextual fear conditioning tasks, we confirmed that infant mice trained at postnatal day 20 (P20) displayed deficits in long-term memory retention compared to adult (P60) mice. (c) abnormality might reflect an impaired capacity of the neurons to connect correctly. While several hypotheses have been proposed to explain the occurrence of IA, the neurobiological and molecular bases for this accelerated forgetting phenomenon remain elusive. Infantile amnesia (IA) refers to the inability of adults to recall episodic memories from infancy or early childhood.
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