Answer
An overdose of insulin can lead to hypoglycemia (low blood sugar) in a normal person, which can have a significant impact on brain function.
Work Step by Step
To function effectively, the brain needs a constant supply of glucose (sugar) from the blood. If blood sugar levels go too low, however, cognitive function may be hampered and a number of symptoms may appear.
An excessive amount of insulin may cause the body to absorb too much blood glucose, resulting in a sharp decline in blood sugar levels. Confusion, lightheadedness, blurred vision, slurred speech, headaches, and seizures may be the result of this. Hypoglycemia can, in severe circumstances, result in coma and loss of consciousness.
Hypoglycemia brought on by an excess of insulin can cause death or severe brain damage if left untreated.