Patent ID: 8781796
Filing Date: 2014-07-15
Classification: A61B,G16H

Abstract:
1. A method for estimating alertness of a human subject implemented by a processor, the method comprising: receiving initial values for a plurality of model variables of a mathematical model, one or more of the model values comprising variables which specify or estimate probability distributions, the model variables including: receiving a sleep history input indicative of the subject's asleep and awake status between a first time and a second time; identifying, by the processor, one or more transition time points within the sleep history, each transition time point corresponding to one of: the subject's transition from awake to asleep status and the subject's transition from asleep to awake status; dividing, by the processor, a time between the first time and the second time into a plurality of time segments, each time segment extending between: each time segment also associated with a sleep status value as indicated by the sleep history; initializing, by the processor, the model variables at the first time to be the received initial values; for each time segment, starting at a first time segment whose time segment start time corresponds to the first time through to a last time segment whose time segment end time corresponds to the second time: