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Gray matter heterotopia is a neurological disorder caused by gray matter being located in an atypical location in the brain. [1] Grey matter heterotopia is characterized as a type of focal cortical dysplasia. The neurons in heterotopia are otherwise healthy; nuclear studies have shown glucose metabolism equal to that of normally positioned gray ...
Grey matter contains most of the brain's neuronal cell bodies. [6] The grey matter includes regions of the brain involved in muscle control, and sensory perception such as seeing and hearing, memory, emotions, speech, decision-making, and self-control. The grey matter in the spinal cord is split into three grey columns:
The main patterns of polymicrogyria are: perisylvian (61%), generalised (13%), frontal (5%), and parasagittal parieto-occipital (3%) and 11% is associated with gray matter heterotopia (grey matter is located in the white matter instead of usual location in the cerebral cortex). [1]
Researchers have found that people who battled COVID-19 may have lasting damage to the gray matter and tissue of their The post Brain scans show tissue damage, loss of grey matter in COVID-19 ...
Diffuse axonal injury is caused by shearing forces on the brain leading to lesions in the white matter tracts of the brain. [31] These shearing forces are seen in cases where the brain had a sharp rotational acceleration, and is caused by the difference in density between white matter and grey matter. [32]
The preliminary diagnosis of PVL is often made using imaging technologies. In most hospitals, premature infants are examined with ultrasound soon after birth to check for brain damage. Severe white matter injury can be seen with a head ultrasound; however, the low sensitivity of this technology allows for some white matter damage to be missed.
The infant brain will increase in size by a factor of up to 5 by adulthood, reaching a final size of approximately 86 (± 8) billion neurons. [4] Two factors contribute to this growth: the growth of synaptic connections between neurons and the myelination of nerve fibers ; the total number of neurons, however, remains the same.
Schizencephaly (from Greek skhizein 'to split' and enkephalos 'brain') [1] [2] is a rare birth defect of the brain, characterized by abnormal clefts lined with grey matter that form the ependyma of the cerebral ventricles to the pia mater. These clefts can occur bilaterally or unilaterally.