Posts Tagged ‘hippocampus’

Sharp waves and memories

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The consolidation of memories depends on the hippocampus. The hipppocamus generates ripple activity, which is a sharp wave oscillation at 100-300 Hz, mainly within the CA1 region of the hippocampus. Sharp-wave associated field oscillations of the hippocampus, referred to as ripples, are thought to be involved in the consolidation of memories. The median raphe region

Time and the brain

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Temporal synchrony and gamma-to-theta power conversion in the dendrites of CA1 pyramidal neurons Sachin Vaidya & Daniel Johnston, University of Texas :: Nature Neuroscience, Vol. 16, No. 12, December 2013 Summary and review of the above paper Gamma and the slower theta oscillations combine to synchronise neural activity related to the hippocampus. The relative timing of this neural firing is regarded as a temporal code. A neuron in the CA1 region of the hippocampus can receive inputs via Read more […]

The brain and navigation

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A local anchor for the brain’s compass Martin J. Chadwick & Hugo J. Spiers, University College London, based on Marchette et al (2014) :: Nature Neuroscience, Vol. 17, No. 11, November 2014 :: www.nature.com/neuro  Summary and review of the above article INTRODUCTION: This study looks at neurons dealing with head direction and also location that are centred on the medial parietal cortex. However, it is admitted that both these neurons and the better known place cells provided only Read more […]

Learning

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Neuroculture: On the implications of brain science for understanding Edmund T. Rolls, Oxford Centre for Computational Neuroscience Oxford University Press (2012) P. Summary of p. 27-65 re: learning P. Keywords: CA3, CA1, hippocampus Learning is based on increases in synaptic strength occurring as a result of the firing of pre-synaptic neurons  and the activation of post-synaptic neurons. This is the basis of long-term synaptic potentiation (LTP). The pre and post synaptic activity needs Read more […]