Brain when hearing

Brain when hearing

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Caption: Positron computed tomography (PCT) scans of the brain, showing the results of 4 types of auditory stimulation. PCT scans depend on the brain's use of glucose to fuel its activity. A volunteer is injected with a minute dose of a radioactive tracer chemical that binds to glucose molecules in the blood. The glucose tends to concentrate in parts of the brain where there is increased activity (cerebral metabolism), & is detected by the emission of positron radioactivity from the tracer. The resulting signals are processed by computer to give maps which show which parts of the brain are most active.

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Keywords: anatomy, auditory sense, brain, brain function, emission, functional, hearing, human body, imaging, nervous system, neuroimaging, pct scan, pet scan, positron computed tomography, sensory reaction, sensory system, sound, stimulation

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