Research conducted by Iaroslav Savtchouk, a graduate student, and S. June Liu, PhD, Associate Professor of Cell Biology and Anatomy at LSU Health Sciences Center New Orleans, has shown that a single exposure to acute As part of the study, the men were required to complete a series of tests that measured levels of stress, including that from the workplace, stressful life events and overall perceived stress. They were also required to provide semen samples. Using standard fertility testing methods, researchers from the University of California, Davis, analyzed semen concentration, and sperm shape (morphology) and movement (motility) in each sample.
The researchers found that a five-minute exposure to the odor of a predator produced the insertion of receptors containing GluR2 at the connections (synapses) between nerve cells in the brain. GluR2 is a subunit of a receptor in the central nervous system that regulates the transfer of electrical impulses between nerve cells, or neurons. The presence of GluR2 changed electrical currents in the cerebellum in a way that increased activity and altered the output of the cerebellar circuit in the brains of mice.

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