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The cortex then builds up a more complex representation, which it then feeds back to the thalamus to select the information that it needs to complete or organize the picture. “Instead, we found that nitric oxide reduced signals from the eyes, and enhanced the feedback from the cortex. Nitric oxide enhances this feedback effect. This discovery was made by isolating inputs to the thalamus into two groups: inputs from the eyes; and a second group of feedback inputs from the cortex. Scientists knew that the thalamus sends information to the cortex, but did not know that nitric oxide affects how the cortex communicates back. The heart drug nitroglycerin is converted to nitric oxide by the body and widens blood vessels, buy viagra easing the pain of angina. We found that this drug blocks K-RAS interaction with the plasma membrane," Cho said. "We found within this same mechanism that sildenafil, also known as Viagra, also does the same thing. If you have any kind of questions relating to where and how to utilize viagra online, you can contact us at the web-site. In the animal studies, Godwin and colleagues found something surprising about how it enhances the flow of sensory information from the eyes to the brain to process vision. “This showed us something important about how the brain communicates with itself - it is a more cooperative and flexible relationship than we imagined,” he said.

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