Current Concepts in Concussion: Evaluation and Management - American Family Physician - 0 views
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Shear forces disrupt neural membranes, allowing potassium efflux into extracellular space. Resultant increases of calcium and excitatory amino acids are followed by further potassium efflux, leading to suppression of neuron activity.8–10,12,20 As sodium-potassium pumps restore balance, there is increased energy requirement, yet a paradoxical decrease in cerebral blood flow.