How does high blood sugar effect the brain?

Impairs Nervous Sys. Chronically high blood sugar (diabetes mellitus) impairs the central and peripheral nervous system both directly and indirectly. The brain's only source of energy is glucose and chronically high readings (above 270 mg/dl) is associated with mild cognitive dysfunction. Indirect effects include acceleration of atherosclerosis increasing the risk for stroke and kidney failure. This is but a few ex.

Related Questions

If someone ends up in the hospital once from a high blood sugar, could that have caused brain damage to the amygdala?

Unlikely. If it was just high blood glucose, it is unlikely that it would cause a vascular event, like a stroke or tia. If you were severely dehydrated, in ketoacidosis, in shock, or otherwise severely ill, then it is more likely, but you would have probably had neurological symptoms at the time. Read more...
Amygdala. A single hospital admission for high blood sugar would not likely cause damage to the amygdala. Read more...