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Full-Text Articles in Medicine and Health Sciences
Eye Position Signal Modulates A Human Parietal Pointing Region During Memory-Guided Movements., J F Desouza, S P Dukelow, J S Gati, R S Menon, R A Andersen, T Vilis
Eye Position Signal Modulates A Human Parietal Pointing Region During Memory-Guided Movements., J F Desouza, S P Dukelow, J S Gati, R S Menon, R A Andersen, T Vilis
Brain and Mind Institute Researchers' Publications
Using functional magnetic resonance imaging, we examined the signal in parietal regions that were selectively activated during delayed pointing to flashed visual targets and determined whether this signal was dependent on the fixation position of the eyes. Delayed pointing activated a bilateral parietal area in the intraparietal sulcus (rIPS), rostral/anterior to areas activated by saccades. During right-hand pointing to centrally located targets, the left rIPS region showed a significant increase in activation when the eye position was rightward compared with leftward. As expected, activation in motor cortex showed no modulation when only eye position changed. During pointing to retinotopically identical …
Nimodipine Aggravates Systemic Kainic Acid Toxicity In Retinal Ganglion Cells Of Intact Mice, Akçahan Gepdi̇remen, Murat Kaya, İbrahi̇m Koçer, Cemal Gündoğdu
Nimodipine Aggravates Systemic Kainic Acid Toxicity In Retinal Ganglion Cells Of Intact Mice, Akçahan Gepdi̇remen, Murat Kaya, İbrahi̇m Koçer, Cemal Gündoğdu
Turkish Journal of Medical Sciences
The aim of the present study was to investigate the role of the L-type voltage dependent Ca^2^+ channel blocker, nimodipine, in kainate induced toxicity in retinal ganglion cells of mice. Kainate in 10mg/kg was administered intraperitoneally following the vehicle or nimodipine. Nimodipine, 45 minutes prior to kainate in 10, 15, 25, 50, 100 and 250 mg/kg doses was administered intraperitoneally. Surprisingly, nimodipine potentiated the ganglional cell death induced by kainate, with respect to the control and kainate+vehicle treated group. In accordance with our results, blockage of L-type calcium channels by nimodipine may worsen the prognosis and survival of retinal neurons …