30 Dec '17, 4pm

From Macro to Micro: A Visual Guide to the Brain

From Macro to Micro: A Visual Guide to the Brain

A Wiring Diagram Image: USC Laboratory of Neuro Imaging/Athinoula A. Martinos Center for Biomedical Imaging/Consortium of the Human Connectome Project When neuroscientists trace the connections between brain regions, they focus on networks of electrically active brain cells called neurons. These neurons link up with one another, sending electrical signals through complicated circuits that span the brain. Each of the human brain’s 86 billion neurons can connect to thousands of others. Neuron to Neuron All illustrations: James Provost Each neuron receives incoming signals through branching structures called dendrites and outputs signals through its long axon. If the combination of incoming signals raises the neuron’s voltage past a certain threshold, voltage-gated ion channels all along the axon begin to open. Taking Action The open channels allow ions to flow in, creating a...

Full article: https://spectrum.ieee.org/biomedical/imaging/from-macro-t...

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