Mental or Behavioral Dysfunction
initial insomnia
in·i·tial in·som·ni·a
Definitions related to initial insomnia:
  • Falling asleep with difficulty; usually seen in anxiety disorder. Compare with middle insomnia and terminal insomnia.
    Sadock's Comprehensive Glossary of Psychiatry and Psychology
    BJ Sadock Titles Press, 2012
  • (sleep onset insomnia) Difficulty initiating sleep, that is, increased sleep onset latency, refers to the condition where it takes 30 minutes or more to fall asleep.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
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