Imagine meeting four separate individuals who have each sustained an injury

 Imagine meeting four separate individuals who have each sustained an injury to a different area of the brain. Person A has irreversible damage to her frontal lobe. Person B has irreversible damage to his parietal lobe. Person C has irreversible damage to her temporal lobe, and person D as irreversible damage to his occipital lobe. Briefly, what would be the effects of each of these injuries? Talk about each person specifically, indicating what functions are mediated by these brain areas. Include information on brain and neuron function generally.