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Organization of the Cerebrum

  • A thin layer of gray matter known as the image descriptioncerebral cortex is found immediately beneath the convoluted surface of the cerebrum.
Sagittal and coronal planes of the cerebrum showing the brain parts (Cerebrum, Diencephalon, Cerebellum and Brainstem)
Sagittal and coronal planes of the cerebrum showing the cerebral cortex and the brain parts (Cerebrum, Diencephalon, Cerebellum and Brainstem)
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  • Even though the cortex is less than 5 millimeters in thickness, it contains approximately 70-75 of the body’s neurons.
  • This is where you perform language related tasks, image sensations, form complex thoughts, make judgments, and plan and execute motor movements.
  • Deep to the cerebral cortex lies an expanse of white matter called the image descriptioncerebral medulla, which is composed largely of tracts of myelinated axons.
Sagittal and coronal planes of the cerebrum showing the brain parts (Cerebrum, Diencephalon, Cerebellum and Brainstem)
Sagittal and coronal planes of the cerebrum showing the cerebral medulla and the brain parts (Cerebrum, Diencephalon, Cerebellum and Brainstem)
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  • The image descriptionimpulses carried by these tracts allow communications between different regions of the cerebral cortex. They also link the cerebral cortex to other parts of the brain and spinal cord.
  • Three pairs of image descriptionsubcortical nuclei (or gray matter) are embedded in the the white matter of the cerebral medulla.
Sagittal and coronal planes of the cerebrum showing the brain parts (Cerebrum, Diencephalon, Cerebellum and Brainstem)
Sagittal and coronal planes of the cerebrum showing the subcortical nuclei and the brain parts (Cerebrum, Diencephalon, Cerebellum and Brainstem)
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  • The oval and C-shaped nuclei lie lateral to the thalamus of the diecephalon and belong to a larger group of nuclei called the basal nuclei (or basal ganglia).
  • The basal nuclei help the cortex and cerebellum plan and execute motor movements.