In the primary repression phase, 'it is highly probable that the immediate precipitating causes of primal repressions are quantitative factors such as...the earliest outbreaks of anxiety, which are of a very intense kind'.
1 A neurologist treats brain and nervous system disorders that may contribute to sleep problems.  An otolaryngologist treats ear, nose, and throat conditions. This doctor may evaluate snoring and other breathing problems associated with sleep disorders.
A neurologist is a physician who specializes in disorders of the brain, particularly the nervous system. A competent neurologist treats patients who suffer from a wide range of conditions, including dementia, epilepsy, brain tumors, amnesia, and migraine disorder.