To learn more about this topic, start your googling with these keywords:

• Chronic traumatic encephalopathy: a progressive degenerative disease of the brain found in people with a history of repetitive brain trauma (often athletes)

• Traumatic brain injury (TBI): a disruption in the normal function of the brain that can be caused by a bump, blow, or jolt to the head, or penetrating head injury

• Subdural hematoma: a collection of blood between the layers of tissue that surround the brain

• Cerebral microbleeding: small chronic brain hemorrhages which are likely caused by structural abnormalities of the small vessels of the brain

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