Objective classification of motion- and direction-sensitive neurons in primary somatosensory cortex of awake monkeys

S. Warren, H. A. Hamalainen, and E. P. Gardner, "Objective classification of motion- and direction-sensitive neurons in primary somatosensory cortex of awake monkeys." It was incorrectly stated that Orban and co-workers (J. Neurophysiol. 45: 1059–1073, 1981) attributed direction selectivity to cortical neurons having a direction index (DI) 20. Orban et al. actually used a weighted average of DIs and defined cells with a mean DI (MDI) above 50 as direction selective. Their criterion for direction selectivity was stricter and not less stringent, as stated in the paper. This error does not alter any of the data or conclusions of Warren et al.