![]() | Lobes of the Brain | ![]() |
| The average human brain weighsabout 1,400 gm (3 lb). When the brain is removed from the skull, it looksa bit like a large pinkish-gray walnut. The braincan bedivided down the middle lengthwise into two halves called the cerebralhemispheres. Each hemisphere of the cerebral cortex is dividedinto four lobes by various sulci and gyri...the sulci (or fissures) are the groovesand the gyri are the "bumps" that can be seen on the surface of thebrain. The folding of the cerebral cortex produced by these bumps andgrooves increases the amount of cerebral cortex that can fit in theskull. (In fact, the total surface area of the cerebral cortex is about324 square inches - about the size of a full page of newspaper!).Althoughmost people have the same patterns of gyri andsulci on the cerebral cortex, no two brains are exactlyalike. |
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OCCIPITALLOBE
| FRONTAL LOBE
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TEMPORALLOBE
| PARIETALLOBE
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![]() Hear IT! |
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The skull of Phineas Gage. Learn more about the frontal lobes in an article called Unraveling the Mystery of theFrontal Lobes. Did youknow? 


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