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Definition of CEREBRAL HEMISPHERE. : either of the two hollow convoluted lateral halves of the cerebrum â see brain illustration.
The cerebrum is the largest part of the brain. It is divided into 2 parts (halves) called the left and right cerebral hemispheres. The 2 hemispheres are connected by a bridge of nerve fibres called the corpus callosum.The right half of the cerebrum (right hemisphere) controls the left side of the body.he cerebrum is the largest part of the brain. It is divided into 2 parts (halves) called the left and right cerebral hemispheres. The 2 hemispheres are connected by a bridge of nerve fibres called the corpus callosum.