This is an observational, physiology pilot study of subjects with overactive bladder, insomnia and normal subjects. No study drug will be given. All subjects will complete a one week sleep diary and a 3-day bladder diary. After one week, subjects meeting eligibility requirements will complete a single sleep night stay in a sleep laboratory setting. During the sleep night stay, subjects will be evaluated using cystometry and polysomnography. In the morning following the sleep night stay, subjects will complete a sleep questionnaire and this will complete their participation in the study.

Inclusion Criteria:

• Must not have a urinary tract infection

• Time in bed between 6.5 and 9 hours for at least 5 nights per week for preceding month

• Usual bed time is before midnight (24:00 hours) and typically does not vary by ± 1 hour for preceding month

• OAB subjects

  • OAB symptoms for >= 3 months
  • Documented detrusor overactivity episodes within 6 months

• Insomnia subjects

  • Diagnosis of chronic primary insomnia
  • History of > 1 month of waking up more than 2 times per night and being awake for more than 60 minutes per night for at least 3 months

Exclusion Criteria:

• Diagnosis of both OAB and primary insomnia
• Diagnosis of nocturnal polyuria
• Diagnosis of BPH
• BMI >= 34

Subjects identified through urology physicians, sleep laboratory physicians and advertising