Barrel cortex function
Dirk Feldmeyer,Michael Brecht,Fritjof Helmchen,Carl C.H. Petersen,James F.A. Poulet,Jochen F. Staiger,Heiko J. Luhmann,Cornelius Schwarz +7 more
TL;DR: It is argued that in order to understand neocortical function one needs to combine a microscopic view, elucidating the workings of the local columnar microcircuits, with a macroscopic view, which keeps track of the linkage of distant cortical modules in different behavioral contexts.
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About: This article is published in Progress in Neurobiology. The article was published on 01 Apr 2013. and is currently open access. The article focuses on the topics: Barrel cortex & Cortical column.
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TL;DR: Activity in populations of L5 pyramidal dendrites of the somatosensory cortex in awake and anaesthetized rats following sensory stimulation is investigated using a new fibre-optic method for recording dendritic calcium changes, and the results constitute a functional description of a cortical microcircuit in awake animals that relies on the active properties of L4 pyramides and their very high sensitivity to inhibition.
Background Synaptic Activity Is Sparse in Neocortex
Jack Waters,Fritjof Helmchen +1 more
TL;DR: It is shown, using whole-cell recordings in anesthetized rats, that spontaneous depolarizations in neocortical pyramidal neurons are driven by sparse, mostly excitatory synaptic activity, and the effect of synaptic background is weaker than previously thought.