Sleeping is obsessed because of the following factors: 1, abnormal discharge of brain cell nuclei, these conditions often appear in the past history of cerebrovascular disease, such as epileptic seizures or Parkinson’s disease, the patient’s brain cell nigrostriatal dopamine striatum will often appear abnormal discharge and so on, there will be obsessed in the sleep. 2, sleep obsessed and transient cerebrovascular stenosis caused by the cerebrovascular ischemic seizure related, in the case of insufficient blood supply to the vertebral basilar artery, there will also be obsessed in sleep. 3, patients with lack of oxygen during sleep, such as sleep apnea syndrome, also can occur Cerebrovascular ischemic attack related, in the case of the vertebral basilar artery blood supply is not complete, will also appear in the sleep of the situation. 3, sleep in the lack of oxygen in the patient, such as sleep apnea syndrome, also because of the lack of oxygen led to sleep in the situation of sudden fascination.