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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.
Non-renewable Resources: After learning about the renewable resources like water, forests etc., you would like to know what our non-renewable resources such as land, mineral,
Explains Osmotic Pressure – Functions of plasma proteins Plasma proteins exert an osmotic pressure of 25 mm Hg, which helps in maintaining plasma volume. The osmotic pressure e
Explain Protein Protein is derived from a Greek word "PROTOS" which means "Pre eminent", "jht or foremost" or primary matter. This name was suggested by Berzi
Explain an Amniocentesis An amniocentesis is a process used to obtain a small sample of the amniotic fluid which surrounds the foetus to diagnose chromosomal disorders and open
We know from Shannon's Theorem, Maximum data rate of a channel in bps (B) = Hlog2 ( 1+S/N ) _ 1 Where H = bandwidth in Hz S/N = signal-to-noise ratio We also know that Db = 10log10
Explain the Structure of Tongue The tongue is a muscular organ. It is covered with a mucous membrane. The tongue is attached by its base to the hyoid bone and by a fold of its
Explain the Renal Failure It is the inability of the kidneys to manufacture and excrete urine causing the waste products to accumulate in the blood plasma. If the kidneys do no
Explain the Muscle layer This layer consists of two layers of smooth muscle. The outer layer is a longitudinal muscle layer and the inner layer is a circular muscle layer. But
How soil textural classes categorised and what are is their significance? The soil textural classes are based on the percentage of the separate(s) which contributes maximum to
general characters of cylintreta
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