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How does the arrangement of gray and white matter differ in the cerebral hemispheres and the spinal cords?
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What is gray matter white matter how does the arrangement of gray and white matter differ in the cerebral hemispheres?
Gray matter is mainly densely packed nerve cell bodies and comprise the outer layer of the cerebrum. White matter is mainly axons surrounded by myelin and are the inner layer of the cerebrum.
Bands of white matter that join the right and left cerebral hemispheres?
corpus callosum
What type of white matter fiber tract connects the two cerebral hemispheres?
commissures
Which cerebral white matter structure conducts nerve impulses between gyri in different hemispheres o?
association tracts
What is the white matter that lies beneath the cerebral cortex?
the corpus callosum. it also connects the brain's two hemispheres.
If decorticate posturing is present the lesion is?
Anatomic location of the lesion would be below the cortex, in the white matter or the cerebral hemispheres or upper part of the brain stem.
What is the gray matter on the surface of the brain called?
Grey matter is distributed at the surface of the cerebral hemispheres (cerebral cortex) and of the cerebellum (cerebellar cortex), as well as in the depths of the cerebrum (thalamus; hypothalamus; subthalamus, basal ganglia - putamen, globus pallidus, nucleus accumbens; septal nuclei), cerebellar (deep cerebellar nuclei - dentate nucleus, globose nucleus, emboliform nucleus, fastigial nucleus), brainstem (substantia nigra, red nucleus, olivary nuclei, cranial nerve nuclei) and spinal grey matter (anterior horn, lateral horn, posterior horn).
What are the folds on the cerebral hemispheres?
Gyri is the name of the folds in the gray matter of the brain that form the cerebral cortex. These folds increase the surface area of the cortex, facilitating diffusion of nutrients, respiratory gases, and wastes between the nervous tissue and the cerebrospinal fluid and blood stream.
Connects the cerebral hemispheres?
The Anterior Commissure (precommissure) is a bundle of nerve fibers (white matter), connecting the two cerebral hemispheres across the midline, and placed in front of the columns of the fornix.The fibers of the anterior commissure can be traced laterally and backwards on either side beneath the corpus striatum into the substance of the temporal lobe. Corpus callosum
What is in the cerebral cortex?
In the cerebral cortex there are 6 layers of neurons (grey matter).
What is responsible for communication between cerebral areas and between the cerebral cortex and lower CNS centers?
The cerebral white matter
What is the meaning of cerebral medulla?
The cerebral medulla is the white matter (myelinated axons) of the cerebrum.
