A randomized, double-blind, placebo-controlled crossover trial has found that 200 milligrams of caffeine improves short-latency afferent inhibition (SAI), a measure of how the brain integrates sensory input with motor output, according to a report published in a peer-reviewed journal.
The study involved 20 healthy adults and used transcranial magnetic stimulation (TMS) to assess SAI before and after caffeine or placebo administration, the report stated.
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