what is the difference between white matter and grey matter in the brain?
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Grey matter is distinguished from white matter in that it contains numerous cell bodies and relatively few myelinated axons, while white matter contains relatively few cell bodies and is composed chiefly of long-range myelinated axons. The colour difference arises mainly from the whiteness of myelin.
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What is the main difference between an MRI scan and an fMRI scan? MRI scans show structural details of the brain, fMRI scans show structure and activity levels.
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These functional units are present in both central nervous system (CNS) and peripheral nervous system (PNS). The main difference between ganglia and nuclei is that ganglia are clusters of nerve cell bodies in the PNS whereas nuclei are clusters of nerve cell bodies in the CNS.
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The cerebral cortex, which is the most superficial part of the hemispheres and is only a few millimeters in thickness, is composed of gray matter, in contrast to the interior of the hemispheres, which is composed partly of white matter.
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Difference Between Brain and Mind. ... Brain is considered to be a physical thing, the mind is considered to be mental. The brain is composed of nerve cells and can be touched, whereas, the mind cannot be touched.
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CSF is also found centrally within the ventricles. The sulci, fissures, basal cisterns and ventricles together form the 'CSF spaces', also known as the 'extra-axial spaces'. CSF is of lower density than the grey or white matter of the brain, and therefore appears darker on CT images.
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FMRI scans use the same basic principles of atomic physics as MRI scans, but MRI scans image anatomical structure whereas FMRI image metabolic function. Thus, the images generated by MRI scans are like three dimensional pictures of anatomic structure.
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The human brain is rounded, whereas the sheep's brain is elongated in shape. 4. The human brain has a larger frontal lobe than the sheep's brain. ... The human brain and sheep brain have the major difference that humans can think, write, invent or create with their brains, whereas sheep cannot.
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There are three main types of white matter nerve fiber tracts: commissural fibers, association fibers, and projection fibers. ... Association fibers connect brain regions within the same hemisphere. Projection fibers connect the cerebral cortex to the brainstem and spinal cord.
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Some major differences between Grey and White Cement are: 1- In gray cement raw materials contain a high amount of iron oxide and manganese oxide while in white cement raw materials contain a very little amount of iron oxide and manganese oxide. 2- Grey cement is less fine than white cement.
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Cerebrospinal fluid is produced by tissues lining the ventricles of the brain. It flows through the ventricles by way of interconnecting channels. The fluid eventually flows into spaces around the brain and spinal column. It's absorbed primarily by blood vessels in tissues near the base of the brain.
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KEY POINTS. The left hemisphere is dominant with regard to language and logical processing, while the right hemisphere handles spatial perception. The brain is separated into the frontal, temporal, occipital, and parietal lobes. The frontal lobe is associated with executive functions and motor performance.
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The cerebrum describes the whole main part of the brain. It consists of two types of tissues called grey and white matter. Grey matter is composed of neural cell bodies and forms the outer, surface layer of the cerebral hemispheres. ... Strictly speaking, only the outer grey matter layer can be called the cerebral cortex.
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Grey hair happens when there is still black or natural colored hair left. White hair is when all color is gone leaving only white hair. Every single hair on our body has its own cycle.
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Gray matter is peculiar for containing the neuron cell bodies. The scientific name for the neuron bodies is soma (1). White matter is specific for containing myelinated axons (1). ... This structure connects the brain cells and is distributed in tracts or bundles.
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The size and surface area of the cerebral cortex varies dramatically across mammals. ... They found a greater proportion of prefrontal cortex gray matter volume in humans than in the two nonhuman primate species, and they observed an even greater difference between species for white matter volume in the prefrontal cortex.
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Cerebrum. The cerebrum, which forms the major portion of the brain, is divided into two major parts: the right and left cerebral hemispheres. The cerebrum is a term often used to describe the entire brain. A fissure or groove that separates the two hemispheres is called the great longitudinal fissure.