As a result , the affected area of the brain can not function normally , which might result in an inability to move one or more limbs on one side of the body , failure to understand or formulate speech , or a vision impairment of one side of the visual field .
Symptoms might include : hemiplegia ( an inability to move one or more limbs on one side of the body ) , aphasia ( inability to understand or use speech ) , or an inability to see one side of the visual field .