Microelectrodes In Brain
For a quite long time it was believed that the motor strip of the cerebral cortex is the executive region of the brain, giving the order for action …
When a patient is conscious during brain operation, the surgeon can electrically stimulate the moter strip and produce distinct movements in such area as the feet, hand, jaws, etc. Penfield and his colleagues in Montreal have in the brain. One think soon became clear : none of the patients stimulated in this manner had the feeling that he was making the movement of Own will, on the contrary, all were rather surprised at this body movement. One patient, who efforts were reported by Jose Delgado tried unsuccessfully to perevnt a hand-clenching movement produced by brain stimulation and remarked.
As we have seen earlier, researchs have sought to localize the seat of consciousness in the limbic system generally, pinpointing the hypothalamus as the particular region connected with our feeling and emotions. But the landmark experiments performed by white, alingwith other independent investigation conducted by Masserman, lead to the conclusion that the hypothalamus is merely another servent to mind, not the mind Itself. When white stimulated the Hypothalamus in human patients, he has produced autonomic discharge, but not strong feelings or subjective experience of emotions.
Masserment stimulated the hypothalamus is cat and discovered that this produced a ” pseudoaffective” response which was mechanical, stereotyped, and stimulus bound. In no sense could it be interpreted as an emotional that was fully expressed and experienced. These experiments strongly suggest that although the hypothalamus is related to feeling and emotions, it’s cannot be the originator of them. The mind, in other words, is really metaphysical after all. Although the evidence for the existence of a non-matarial mind is highly persuasive, thanks to Morden experimentation, nonetheless we cannot accept the understanding unit it has met two great challenges : One from the neurologist and another from the computer scientist.