Fig. 2. Rate of oxygen consumption (A) and body mass (B) of two groups of cockroaches measured weekly during prolonged deprivation of sleep-like rest (SD; filled circles) or control protocol (SC; open circles). Symbols indicate means ± s.e.m., sample size=10, except where indicated by numbers in parentheses. Asterisks indicate values significantly different from baseline (day 0) and significantly different from corresponding values in SC group.