Effect of Age on EEG Arousals in Normal Sleep

Mirella Boselli, Liborio Parrino, Arianna Smerieri, Mario Giovanni Terzano

Research output: Contribution to journalArticlepeer-review


EEG arousals were quantified in 40 nocturnal polysomnographic recordings belonging to four age groups (teenagers: 10 to 19 years; young adults: 20 to 39 years; middle-aged: 40 to 59 years; elderly: ≥ 60 years). Ten subjects (five males and five females) participated in each group. The subjects were healthy and sound sleepers. All sleep recordings were preceded by an adaptation night which aimed at excluding the presence of sleep-related disorders. The recordings were carried out in a partially soundproof recording chamber and in a standard laboratory setting. Arousal indices (AI), defined as the number of arousals per hour of sleep, were calculated for total sleep time (AI/TST) and for all the sleep stages. AI/TST increased linearly with age (r=0.852; p

Original languageEnglish
Pages (from-to)351-357
Number of pages7
Issue number4
Publication statusPublished - Jun 15 1998


  • Aging
  • Arousals
  • Normal sleep
  • Phases d'activation transitoire
  • Sleep microstructure

ASJC Scopus subject areas

  • Physiology


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