Some causes of a nightmare

Some of the causes of Incubus : 1 / chemical theories vital : This theory focuses on the work of neurotransmitters and their role in regulating many of the operations of the brain . . . The imbalance of the neurotransmitter leads to impaired dreaming sleep, which in turn will lead to some sleep disturbances (such as nightmare ). ** Quoted by Dr. Fahd Al-Osaimi