Correction

In the article “Control of Serotonergic Function in Medial Prefrontal Cortex by Serotonin-2A Receptors through a Glutamate-Dependent Mechanism,” by Raúl Martín-Ruiz, M. Victoria Puig, Pau Celada, David A. Shapiro, Bryan L. Roth, Guadalupe Mengod, and Francesc Artigas, which appeared on pages 9856–9866 of the December 15, 2001 issue, the seventh sentence of the seventh paragraph of the Discussion should read “Moreover, the systemic administration of DOI increased Fos expression in superficial layer V and above, an effect also dependent on the integrity of thalamic inputs onto somatosensory cortex (Scruggs et al., 2000).”