Cortical area MT of macaque monkeys contains directionselective neurons. Some respond only to the components of complex moving patterns, whereas others compute true pattern motion. In Nature, Pack et al. reported that most MT neurons compute pattern motion in alert macaques but signal only component motion under anesthesia, but we have found the prevalence of component- and pattern-selective neurons to be unaffected by anesthesia. Pack et al. conclude that motion integration circuits are impaired by anesthesia. We believe their results can be explained by their choice of stimuli and anesthetic.