Seminars & Events
Friday, October 4, 2013: Dr. Laurie Ryan, SMCM '86 (National Institute on Aging) will speak on "Alzheimer's Disease: Targets and Treatments" at 3:00 pm in Goodpaster Hall 195.
Monday, October 21, 2013: Dr. Greg Elmer (University of Maryland Baltimore) will speak on "Domains and Constructs in Motivation: Where Does the Habenula Fit In?" at 4:45 pm in Goodpaster Hall 195.
Friday, October 25, 2013: Dr. Terry Davidson (American University) will speak on "Why We Overeat and Become Obese? It Could be What We Think!" at 3:00 pm in Goodpaster Hall 195.
Dr. Gwen Calhoon '06 recently received her Ph.D. in Neuroscience from the University of Maryland Baltimore, and was inducted into Nu Rho Psi.
Wiest, Matthew & Saul, Ronald (2005). Modeling Schizophrenia Through a Lesion of the Ventral Hippocampus in Neonatal Rats.
Patients with schizophrenia have deficits in spatial working memory, a function dependent on the hippocampus and its target structures. Post-mortem analyses of schizophrenic brains have shown pyramidal cell disarray in the hippocampus. We used the neonatal ventral hippocampal lesion (NVHL) rat model of schizophrenia to determine if spatial working memory is disrupted in a radial arm maze task. In the non-delayed random foraging (NDRF) task, rats were required to forage for sucrose pellets in 4 arms of the 8-arm maze without re-entering any arms. Rats were also tested for prepulse inhibition (PPI) of the acoustic startle response. Lesioned and sham-treated rats acquired the NDRF task in the same number of days, and did not differ on any behavioral measures on this task. However, lesioned rats exhibited a deficit in PPI, indicating impaired sensorimotor gating. These results suggest that the NVHL model reproduces some of the working memory and sensorimotor gating abnormalities observed in patients with schizophrenia. However, spatial navigation impairments may be limited to task conditions which place higher demands on working memory.
View the PowerPoint slides (pdf format, 597KB)