Final answer:
Gerstmann syndrome is characterized by dysgraphia, dyscalculia, finger agnosia, and left-right disorientation, with lesions typically found in the left parietal lobe, specifically the angular gyrus.
Step-by-step explanation:
The four symptoms of Gerstmann syndrome are dysgraphia (difficulty in writing), dyscalculia (difficulty in mathematics), finger agnosia (inability to distinguish fingers), and left-right disorientation. Gerstmann syndrome is associated with lesions in the dominant (usually left) parietal lobe, specifically, the angular gyrus. The lesions in this area can cause deficits in language and speech functions, similar to aphasias related to damage to Broca's or Wernicke's areas in the left hemisphere. The correct answer to the question is 'b. Dysgraphia, dyscalculia, left parietal lobe'. This syndrome is a result of disruptions to the important integration areas and white matter connections in the cerebral cortex related to sensorium functions such as language processing, praxis (motor planning), and gnosis (sensory recognition).