The brain cells in the penumbra are threatened by ischemic injury, but not irreversibly damaged. Platelets A component of blood that stick together to form a plug, or clot, when certain substances beneath the blood vessel lining are exposed to circulating blood. Right Hemiplegia Paralysis of the right side of the body caused by a stroke in the left hemisphere of the brain. The right half of the brain. Controls the actions of the left side of the brain Secondary Injury Damage or death of brain cells in the larger area surrounding the infarct.
Secondary injury is caused by a chain reaction of electrical and chemical events.
Because this damage does not occur at the time of stroke, but in the hours following a stroke, it is critical to seek immediate medical treatment for stroke. The sudden interruption of blood flow to a part of the brain that kills brain cells within the area. As a result, body functions controlled by the affected area may be impaired or lost. A stroke caused by bleeding under the thin, delicate membrane surrounding the brain. Thrombolytic Agents Acute interventional drugs which work directly to break up or dissolve stroke-causing clots.