| Sleep paralysis is defined as rapid eye movement parasomnia
and a period of the inability to perform voluntary movements at
sleep onset or upon awakening. Sleep paralysis may occur as isolated
or familial forms, or as one of the classic tetrad of narcolepsy
symptoms [1]. A few factors are believed to predispose individuals
to sleep paralysis including irregular sleep habits, sleep deprivation,
and other disturbances of the sleep-wake rhythm, mental
stress, overtiredness, and sleeping in the supine position. Comparable
to the sleep paralysis, the term ‘‘Kabus’’ has been frequently
used by the medieval Persian physicians. The condition was described
as a feeling of heavy presence sitting on the chest, pressing
the person down and causing difficulty in breathing. Later, the victim
would not be able to move or speak with a distressing feeling
of suffocation. The person would wake up in terror after the condition
subsided. In medieval Persian medicine, Kabus (sleep paralysis)
was considered as the prelude to three different diseases:
epilepsy, stroke and mania. Similar descriptions could be found
in Rhazes’s Liber Continens, Akhawayni’s Hidayat, Avicenna’s Canon
of Medicine, and Jorjani’s Treasure of Khwarazmshah [1].
Alcohol consumption has been recently blamed for triggering
sleep paralysis [2,3]. This however, does not seem to be a recent
finding. In the seventh chapter of the first volume of his Liber Continens,
Rhazes (865–925 AD), the Persian polymath, devoted a section
on epilepsy, sleep paralysis, febrile convulsion, and nightmare.
Therein, he first states that ‘‘. . . and Kabus (sleep paralysis) could occur
in individuals following alcohol consumption’’.... [4]. It was not
until the sixteenth century that the next description of association
between alcohol and sleep paralysis was revealed by Philip
Barrough (Elizabethan surgeon and physician) [5]. In fact, Rhazes’s
notion is probably the first description of what is known today as
alcohol-mediated sleep paralysis. |