Grey matter loss seen after COVID

#GS3 #PRELIMS FACT #SCIENCE.

Context:

 Brain imaging study shows effect on regions related to smell and taste post covid infection.

Key findings from the study:

  • Recently a study that scanned brain images from a group of volunteers to match changes before and after COVID-19 revealed that:
COVID-19 survivors may suffer from a loss of gray matter and other brain  tissue over time, a long-term study suggests | Business Insider India
  • The loss of smell and taste, which is among the foremost common symptoms related to coronavirus infection, is obvious within the brain.
  • It shows significant though subtle gray matter loss linked to a positive COVID-19 test or diagnosis.
  • This [the grey matter loss] might represent a more deleterious impact of COVID-19, or result to risk factors or an interaction of both.  
  • As hospitalised patients were older, had higher Body Mass Index and blood pressure, and higher risk of diabetes.
  • The loss of gray matter in memory-related regions of the brain may successively increase the danger of those patients of developing dementia in the long run .
  • Though the science community cited that, it’s harder to mention that it had been due to COVID and especially because of the novel coronavirus attacking the neurons.

 

BIASA BASICS 

What is Grey Matter:

  • It is a serious component of the central nervous system, consisting of neuronal cell bodies, neuropil (dendrites and unmyelinated axons), glial cells (astrocytes and oligodendrocytes), synapses, and capillaries.
Grey Matter vs White Matter in the Brain
  • Grey matter is distinguished from white matter therein it contains numerous cell bodies and comparatively few myelinated axons, while white matter contains relatively few cell bodies and consists chiefly of long-range myelinated axons.
  • The colour difference arises mainly from the whiteness of myelin.
  • Myelin may be a lipid-rich (fatty) substance that surrounds neuron axons (the nervous system's "wires") to insulate them and increase the speed at which electrical impulses (called action potentials) are passed along the axon.
  • In living tissue, gray matter actually features a Very light grey colour with yellowish or pinkish hues, which come from capillary blood vessels and neuronal cell bodies.

 

 

 

 

 

 

 

SOURCE: THE HINDU 

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