['schizophrenia']
['low dose aut00206 800mg', 'high dose aut00206 2000 mg', 'placebo', 'ketamine']

        Inclusion Criteria:

          -  Male aged 18 to 45 years, inclusive at Visit 1.

          -  Healthy on the basis of medical history, psychiatric history, physical examination,
             vital signs, 12-lead electrocardiogram (ECG), haematology, blood chemistry and
             urinalysis within 6 weeks of Visit 2.

          -  Right-handed.

          -  Not a regular smoker (maximum 5 cigarettes per week or equivalent).

        Exclusion Criteria:

          -  History of, or current condition of, migraine headaches or has undergone operations to
             the head.

          -  History of significant claustrophobia.
      