A look at how the technique of PET (positron emission tomography) has advanced both our ability to diagnose brain injury and our knowledge of localisation of function within the brain.
Written in 2002; 879 words; 8 sources; MLA; $ 31.95
Paper Summary:
This paper examines the technique of positron emission tomography, a technique used for imaging brain activity by measuring the flow of blood containing radioactive atoms that emit positrons. It describes the uses of PET scanning as a research tool and in the diagnosis of brain injuries. It also compares PET to other similar methods such as MRI scanning, x-raying and CT scanning.
From the Paper:
"In particular, PET has been used with great success in the study of which parts of the human brain are involved in language. With the assistance of positron emission tomography, studies have shown striking evidence that there are several independent regions of the brain involved in language. Among these areas that are crucial for language and speech are Wernicke's and Broca's regions. Due to the use of these non-invasive techniques (PET, MRI etc.) we now know that these regions are significantly spread out and are not located near the conventional language regions. We can see in scans from patients that different regions of the brain are used for specific tasks. Eg. a patient hearing words, reading words and seeing words uses very different parts of the brain for each task. (Delcomyn; 1998)."
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