How does lack of sleep affect reaction time?

How does lack of sleep affect reaction time?

Chris Idzikowski (Director of the Edinburgh Sleep Centre) gives expert video advice on: What is sleep deprivation?; What is sleep restriction?; Does sleep deprivation have cumulative effect? and more...

Sleep deprivation will impact on reaction times partly by causing sleepiness, with the sleep just sort of bursting in as micro sleeps and creating a problem with the response but in general also increasing reaction time.