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Forebrain:
The largest part of the brain that you see in Fig. is the cerebrum. It consists of two halves or hemispheres joined together by a band of nerve fibres. Interestingly the crossing over of nerve fibres here causes the right half to control the actions.of the left side of the body and vice versa. The outer surface of the cerebrum is the cerebral cortex. It is often referred to as the 'grey matter' because of its colour. It is profusely supplied with blood vessels. The cortex was explored in a very fascinating way, particularly by a Canadian neuro- surgeon, Wilder Penfield: Since 1900's it was known that the brain cpntained no pain :ceptors and.hence it could be operated upon, without making the person unconscious: local anesthesia, the top of the skull could be removed like a cap to expose the cortex. Penfield did exactly this and he stimulated different parts of the cortex, one by one, by matching them with an electric wire or probe. He was amazed to observe the reactions of the dtients. On touching one part of the cortex with the probe, the patients could see, hear or nell or feel! Patients could revive old memories. Some reported hearing the sound of a articular song; one woman felt as if her daughter was in the room talking to her; another. erson could actually recollect the smell of flowers! Stimulation of other regions caused notor responses such as the movement of an arm or leg.
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Explain the Blood Urea Nitrogen (BUN) It is a test that measures the amount of urea nitrogen in the blood. Urea is formed in the liver as an end product of protein metabolism a
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Technical Developments in Feudal Society: Other innovations used and improved by the Europeans were the lenses and the spectacles. This gave an impetus to the further study
How did it change from Mendeleev to Mosely?
factors which decide the broad area of Scientific activity
(friction is necessery evil)
Importance of nutrition: We cannot live without food. Our hunger can be satisfied by any kind of meal, but to remain healthy and free of disease, our body requires certain kin
Evaluating the possible problems of a technology compared to the expected advantages is known as a ?..
A balance barometer This device depends on the fact that dry air is heavier than moist air at the similar temperature. Two equal cylinders (tin cans would do) are mounted, o
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