📖 The Impact of the COVID-19 Pandemic on Dementia Risk: Potential Pathways to Cognitive Decline
‘SARS-CoV-2 infection initiates a disease progression that has the potential to promote cognitive decline and exacerbate pre-existing dementia.’
❦ ‘SARS-CoV-2 infection, moderated in severity by age-, sex-, and race/ethnicity-dependent factors, initiates a disease progression that has the potential to promote cognitive decline and exacerbate pre-existing dementia.
The damage cascade of COVID-19 is multi-faceted and interdependent, with multiple pathways that could lead to cognitive hazard mechanisms.
One such cognitive hazard mechanism, cerebral direct infection, is possible with the SARS-CoV-2 virus, exhibiting neuroinvasive and neurotropic characteristics with neurovirulent potential.
The greatest cognitive risk though may be from immune-mediated damage originating as cytokine storms that have far-reaching consequences for multiple organ systems, including the brain.
Damage to organ systems and detrimental immune response, across the disease progression of COVID-19, may affect cognition via cerebral ischemia, hypoxia/acidosis, and neuroinflammation.
The initiation of a coagulation cascade, from excessive immune response, which can generate micro-/macro-thromboemboli also poses significant risk.
While long-term cognitive outcomes have not been fully evaluated, emerging reports indicate high rates of long-term symptoms and cognitive alterations in recovered COVID-19 patients.
Due to these plausible COVID-19 cognitive decline pathways, evidence of prevalent neurological symptoms in patients, and long-term symptoms in recovered individuals, our conclusion is that COVID-19 represents a credible risk for cognitive decline and has the potential to exacerbate pre-existing dementia.
For those at higher baseline dementia risk, older adults, those with cardiovascular risk factors, and people of color, COVID-19 may not only increase the risk of cognitive decline but also interact in a synergistic way with pre-existing dementia risk factors to disproportionately increase this dementia risk.’
❂
📖 (28 Jul 2021 ~ Neurodegenerative Diseases) The Impact of the COVID-19 Pandemic on Dementia Risk: Potential Pathways to Cognitive Decline ➤
© 2021 Pyne and Brickman / Neurodegenerative Diseases.
‘SARS-CoV-2 infection, with age-, sex-, and race/ethnicity-dependent moderators that influence severity, initiates interdependent damage pathways that have the potential to cascade toward the outcome consequence of long-term cognitive decline and/or dementia.
Lighter gray arrows represent conditional influences.’
📖 (28 Jul 2021 ~ Neurodegenerative Diseases) The Impact of the COVID-19 Pandemic on Dementia Risk: Potential Pathways to Cognitive Decline ➤
© 2021 Neurodegenerative Diseases.












