What is the impact of traumatic brain injury on the individual's personality and function?

In Claiter v. Rose et al., 2004 BCSC 50, a 53 year old plaintiff suffered traumatic brain injury and a fracture of the C2 vertebrae. He recovered quite well from his neck injury but had severe impairment and frontal lobe dysfunction, with weak memory, deficits of more complex attention, and confusion with an abundance of stimuli. He also had personality problems, which included impulsiveness, excess dependency, poor judgment, absentmindedness, perplexity, and diminished organization. He had changed from being a successful, autonomous businessman to being dependent on his wife and on a structured environment. His wife left him alone for short periods of time but always left him a note to remind him that she would be back.