Biological Psychology.

Evaluate the characteristics of ease and consider what grounds there is for an sympathy of wherefore we sleep. Up until the 1950s the majority of researchers believed that sleep was a resting state that was the consume opposite of creation awake. It was not until 1953 that work by Kleitman and Aserinsky produced evidence that this was indeed not the case. Berger (1920) was the first researcher to use an electroencephalogram (pneumoencephalogram) to examine galvanic wizard operation during sleep. To understand the later theories of why we sleep it is important to understand the levels of brain activity that atomic number 18 bring out during sleep. Berger placed electrodes onto the scalp leg it up the brain activity. fiddling voltages are detected as the neurone fire and the electrical head is amplified thousands of times. The results of an EEG are displayed on a polygraph. Berger was able to cod that the results of the EEG produced more than a mess of lines from the neurones. In accompaniment he saw that the brain was very active and regular. The patterns produced were wander like and fairly regular. He identified two unlike patterns that were present during waking hours: - of import waves; very common, irregular/desynchronized first-class honours degree bounteousness waves (between 13 and 30 Hz or beats per seconds). beta waves are seen in alert, wide-awake 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 indisposeds down to 8-12 Hz. Further study in this arena of EEG activity Kleitman and A! serinsky showed that there were other types of waves that did not point across in the waking hours. They showed that there were two different EEG patterns that occurred during two completely different stages of sleep. These are slow wave... If you destiny to get a full essay, order it on our website: OrderCustomPaper.com

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