Above all, the origin of cerebrum is a help chordate take food, want to stand by mouth ~ of course
The mankind resides chordate door, and the predecessor of cerebrum is chordate ancestor is used assist the nerve that take food protuberant, the mouth leaves very close at the beginning of its are born, inheritance of evolution of that generation generation comes down, cerebrum nature cannot leave too far. Next graphs are signal of development of human embryo cerebra, experience nerve protuberant concern with the position that eats an organ ~
And, cerebrum bud at the beginning of, far what think now without us is so important, because do not have cerebrum, biology all the same can involuntary ground is living. Even if recruit wisdom person the degree of such reach the limit, in at the last gasp, also be acquiesce assures heart lungs function, although the head dies, also can assure airframe the condition with plant person " live on a degradation " .
Next, cerebrum erupts " super- anticipate " , can patch up continues to open ~ forthBut cerebrum opposite content has profit greatly, develop gradually for epochmaking organ, volume is larger and larger also, it is to be not put on the side of the mouth fell, so, long long cerebra was become " outside hang " . Cancel original organism construction, redesigning arrangement is impossible then, because evolution does not have direction, can go before the patch up below existing circumstance continues only, use for instance exceed hard skull to encase cerebrum, prevent this beach " tender bean curd " ~ of go to sticks and staves
Because be patch up,also coming, the close together wrap up that relies on hard skull solely also has corrupt practice, for instance nerve internal medicine weighs disease urgently " the head is hernial " , did not extend a gender too forcedly because of skull namely, just make cerebrum bear pressure ability is very poor. Contrary thorax is celiac, breastbone is OK and outspread, abdominal muscle is soft, bear the much ~ with the strong capability of pressure
Finally, say fine think of extremely the its ~ that fear " cerebrum is very important " , can cerebrum tells us this!Obviously heart lungs function stops a person to be met dead, why cerebrum should ask this question, let us feel it just is the most important, do we fail enough take it seriously, protect it?
