Kroemer and Grandjean described different types of fatigue.
Fatigue may be classified temporally as:
(1) acute
(2) chronic
Fatigue may also be classified as:
(1) generalized
(2) limited
Limited forms include:
(1) eye fatigue
(2) muscle fatigue
(3) mental fatigue
(4) nervous/emotional fatigue (from being overstressed)
Other forms:
(1) circadian and sleep-related
(2) excessive or repetitive use
Chronic nervous/emotional fatigue probably equates to "burnout".