The Activity Of the Living Human Brain

Up until the 1950s the majority of psycho-biologists believed that outlook use was a quietusing state that was the subscribe opposite of cosmos awake. It was non until 1953 that work by Kleitman and Aserinsky produced evidence that this was and then not the case. Berger was the first psycho-biologist to use an electroencephalogram ( encephalogram) to examine electric card activity during witticism activity. To understand the later theories of why we brilliance activity it is important to understand the levels of head word activity that argon present during brain activity. Berger placed electrodes onto the scalp soak up the brain activity. Tiny voltages be detected as the neurone perk up and the electrical signal is amplified thousands of times. The results of an EEG argon displayed on a polygraph. (Kimble, 2002)Berger was able to see that the results of the EEG produced more than than a fixing of lines from the neurones. In fact he byword that the brain was truly a ctive and regular. The patterns produced were sway like and plum regular. He place 2 different patterns that were present during waking hours: - Beta waves; truly common, irregular/desynchronised low amplitude waves (between 13 and 30 Hz or beats per seconds). Beta waves are seen in alert, watchful conscious people. Alpha waves are seen during periods of rest and deep relaxation.

They are more synchronised high-amplitude waves than beta waves. The brain during these waves slows down to 8-12 Hz. (Carlson, 2004)Further take on in this area of EEG activity Kleitman and Aserinsky showed that there were other types of waves that did not occur in the waking hours. They showed that there were both distinct EEG patterns that occurr! ed during two completely different stages of brain activity. These are slow wave brain activity (SWS) and fast eye movement (REM) brain activity. Slow wave... If you want to sound a full essay, fix it on our website: OrderEssay.net

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