(Dec. 15, 2009)--Led by Joe L. Martinez Jr., UTSA Ewing Halsell Distinguished Chair in Biology, a team of UTSA researchers found that radiation therapy can prevent the brain from forming some types of fearful memories. Further research may lead to treatments for post-traumatic stress disorder and Alzheimer's disease.
Radiation therapy reduces the number of new granule cells in the hippocampus, the part of the brain responsible for autobiographical memory. Cranial irradiation, or radiation of the skull, is commonly used as a treatment to prevent cancer from spreading to the brain. However, long-term cognitive impairments, such as the inability to learn or remember new tasks, often occur as a result of the procedure.
The researchers tested the ability of rats to form three types of fear memories: delay fear memories, context fear memories and trace fear memories. Delay fear memories form when a fearful situation occurs simultaneously with another event. Context fear memories form when a fearful situation follows another event and both take place in the same physical space. Trace fear memories form when an event and a fearful situation are separated by a pause.
Combining biological and psychological approaches in the laboratory, the researchers observed the behavior of rats not producing new granule cells in their brains. The researchers observed that the rats were able to form delay and fear memories but were unable to form trace fear memories. The findings led them to believe that new granule cells are not required in the hippocampus of the brain to form delay and context fear memories but are required for the formation of trace fear memories.
"This research has broad applications including treatments for post-traumatic stress disorder and Alzheimer's disease," said Martinez. "If we can pinpoint the neurons in the hippocampus that are responsible for storing trace fear memories, we may be able to selectively erase negative memories by decreasing the number of new granule cells in the brain. Or, we may be able to prevent memory loss by preventing the death of new granule cells. Such therapies could definitely enhance an individual's life, but we have a long way to go before we put the theory into practice."
Join Rowdy Crew near the Roadrunner Statue for food, games and information to get hyped for the game. Some UTSA football players also plan to stop by.
Central Plaza, Main Campus
Interested in becoming a dietitian? Come and speak to our faculty! Bring questions, hear them speak, and obtain information. Event is free.
Main Building (MB 2.220), Main Campus
Be ready to laughs during this entertaining evening at the Homecoming Comedy Show! Free with a UTSA Student ID.
H-E-B University Center Ballrooms (HUC 1.104 and HUC 1.106), Main Campus
Organizations participating in the golf cart parade will be creatively decorating their carts in the 2017 UTSA Homecoming theme "Spirit, Tradition, and Pride".
University Center Lawn, Main Campus
As he wrote about in his book, Kill It To Save It: An Autopsy of Capitalism's Triumph Over Democracy, Corey Dolgon will speak about what made Donald Trump the preferred choice for many voters and shows how policy is crafted, marketed and sold or rejected.
Buena Vista Street Building, Aula Canaria Lecture Hall (BVB 1.328), Downtown Campus
The UTSA African American Studies Program is proud to present Dr. Rupert Evans, a Harvard Macy Scholar and the immediate past President of the Institute for Diversity in Health Management.
Main Building (MB 0.208), Main Campus
President Taylor Eighmy is inviting all UTSA faculty and staff to "Tacos With Taylor." Take the opportunity to introduce yourself to the President at any one of these casual meet and greets.
Frio Street Building, Food Court Commons Area, Downtown Campus
Celebrate 40 years of BestFest, an annual event hosted by Roadrunner Productions as a part of UTSA Homecoming festivities. The event will feature a carnival, food and drink booths, a golf cart parade, firework and live music from Anthem.
Brackenridge Lot 1, Main Campus
The University of Texas at San Antonio is dedicated to the advancement of knowledge through research and discovery, teaching and learning, community engagement and public service. As an institution of access and excellence, UTSA embraces multicultural traditions and serves as a center for intellectual and creative resources as well as a catalyst for socioeconomic development and the commercialization of intellectual property - for Texas, the nation and the world.
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