In the article “The Representation of Visual and Motor Aspects of Reaching Movements in the Human Motor Cortex,” by Michal Eisenberg, Lior Shmuelof, Eilon Vaadia, and Ehud Zohary, which appeared on pages 12377–12384 of the August 24, 2011 issue, the authors inadvertently failed to mention that the technique of differentiating between the visual aspects and the motor components of the task was first introduced by Martin and Ghez (1985). The authors' findings that both visual and motor representations exist in M1 are consistent with the findings of Martin and Ghez (1985), showing both visually sensitive and motor-sensitive neurons in the arm area of cat M1.
