Caused by abnormalities of the nervous system that causes an abnormal control mechanisms such as property used to get accident brain. Stroke Brain tumor will sleep more than normal.
Caused by disorders of the nervous system that causes abnormal control mechanism. For example, people who have brain injuries. Stroke, brain tumors are sleeping more than usual.
Abnormality of the nervous system that control mechanisms is wrong. Such as those used to the accident of brain stroke, brain tumors, to sleep more than usual.