"Millisecond precision" refers to a level of accuracy or detail that measures time in increments of one thousandth of a second. It means being able to precisely measure and track events or timings down to the millisecond level. Full definition
«How is it possible that we can react to sensory stimuli with millisecond precision if intermediate processing elements — on the level of single synapses, single neurons, small networks and even large neural systems — vary significantly in their response to the same repeated stimulus?» (bccn-berlin.de)
1 - how the brain responds to emotions expressed through vocalizations compared to spoken language with millisecond precision; (sciencedaily.com)
This allowed them to track changes in calcium ion concentrations in the cells around wounds in living tissue (as opposed to the cell cultures used in many previous wound response studies) and to do so with an unprecedented, millisecond precision. (sciencedaily.com)