Approximately one-fourth to one-third of life is spent sleeping. Sleep has been a mysterious black box that has only recently been extensively studied within the past two decades. While intuitive, sleep has been identified as being important for both physical and mental well-being.1,2 Disrupted sleep has been implicated in pain syndromes in general and even in temporomandibular disorders.3 The hypothalamus regulates sleep and circadian rhythms with ventrolateral preoptic (VLPO) nucleus playing a key role.4 Sleep disorders can be divided into different categories:5

  • Insomnia
  • Sleep breathing disorders
  • Sleep movement disorders
  • Parasomnias
  • Circadian rhythm disorders
  • Hypersomnia