(491) Direct neurophysiological evidence for spatial suppression surrounding the focus of attention in vision.   Hopf JM, Boehler CN, Luck SJ, Tsotsos JK, Heinze HJ and Schoenfeld MA.   2006.   Proceedings of the National Academy of Sciences of the United States of America, volume 103, pages 1053-1058.

(492) Emotion enhances remembrance of neural events past.   Anderson AK, Wais PE and Gabrieli JD.   2006.   Proceedings of the National Academy of Sciences of the United States of America, volume 103, pages 1599-1604.

(493) Secondary sex ratios and male lifespan: damaged or culled cohorts.   Catalano R and Bruckner T.   2006.   Proceedings of the National Academy of Sciences of the United States of America, volume 103, pages 1639-1643.

(494) Serotonergic neuron diversity: identification of raphe neurons with discharges time-locked to the hippocampal theta rhythm.   Kocsis B, Varga V, Dahan L and Sik A.   2006.   Proceedings of the National Academy of Sciences of the United States of America, volume 103, pages 1059-1064.

(495) Neural connections of the posteromedial cortex in the macaque.   Parvizi J, Van Hoesen GW, Buckwalter J and Damasio A.   2006.   Proceedings of the National Academy of Sciences of the United States of America, volume 103, pages 1563-1568.

(496) Cortical signatures of noun and verb production.   Shapiro KA, Moo LR and Caramazza A.   2006.   Proceedings of the National Academy of Sciences of the United States of America, volume 103, pages 1644-1649.

(497) Gonadal hormone modulation of hippocampal neurogenesis in the adult.   Galea LA, Spritzer MD, Barker JM and Pawluski JL.   2006.   Hippocampus, volume 16, pages 225-232.

(498) Reliability in communication systems and the evolution of altruism.   Zahavi A, in Evolutionary Ecology, pages 253-259.   Stonehouse B and Perrins CM, Editors.   London: Macmillan Press.   1977.

(499) Medullary raphe neurons facilitate brown adipose tissue activation.   Nason MW Jr and Mason P.   2006.   Journal of Neuroscience, volume 26, pages 1190-1198.   The last sentence of the abstract reads: "Thus, both p5HT and non-p5HT OFF cells in the medullary raphe facilitate BAT activation in response to cold challenge or pyrogen." However, the full text article shows that while pain that blocked temperature increases inhibited 19 of 25 OFF cells (76%), it activated 48 of 54 ON cells (88%); that no p5HT cells were recorded during the suppression of BAT (brown adipose tissue) temperature increases by pain; and that the opiate agonist DAMGO activated OFF cells and inhibited ON cells. Consequently, the last sentence of the abstract should read: "Thus, p5HT cells in the medullary raphe facilitate BAT activation in response to cold challenge or pyrogen, while non-p5HT cells, both ON and OFF, modulate BAT suppression in response to noxious stimulation."

(500) Cortico-cerebellar coherence during a precision grip task in the monkey.   Soteropoulos DS and Baker SN.   2006.   Journal of Neurophysiology, volume 95, pages 1194-1206.