write a note on cerebrum?
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Forebrain – The cerebrum
The cerebrum is the largest part of the brain which consists of the cerebral cortex and other subcortical structures.It is composed of two cerebral hemispheres that are joined together by heavy dense bands of fiber called the corpus callosum. It is further divided into four sections or lobes :
Frontal lobe: It is associated with parts of speech, planning, reasoning, problem-solving and movement.
Parietal lobe: Helps in movement, the perception of stimuli and orientation.
Occipital lobe: Related to visual processing.
Temporal lobe: Related to perception and recognition of memory, auditory stimuli, and speech.
The exterior portion of the cerebrum is the cortex, it consists of the neurons cells which are grey in color, hence are also referred as the grey matter. The internal part of the cerebrum is the medulla, it comprises of the neurons cells which are white in color.
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Hi friend_______,
★ It is the largest portion forming nearly two - third of the brain.
★ The cerebrum is longitudinally divided into two halves as right and left cerebral hemispheres by a deep cleft called median cleft.
★ Two cerebral hemispheres are interconnected by thick band of nerve fibres called corpus callosum.
★ The outer portion of each cerebral hemisphere is formed of grey matter and is called cerebral cortex.
★ The inner or deeper part is formed of white matter and is called cerebral medulla.
★ The cortex is extremely folded forming elevations called gyri with depressions between them termed as sulci that increase its surface area.
★ Each cerebral hemisphere is divisible into a frontal lobe, a parietal lobe, a temporal lobe and an occipital lobe.
★ These lobes are also known as cerebral lobes and are associated with specific functions.
★ Any damage in specific lobe in turn affects its function.
Thank you...