Final answer:
Writing skills are typically impaired due to damage to Broca's area, a region in the frontal lobe critical for speech production and language processing. This area is mostly located in the left hemisphere and its impairment can lead to expressive aphasia.
Step-by-step explanation:
In most individuals, writing skills would be impaired if there was damage to Broca's area, which is located in the frontal lobe. This region of the brain is associated with the motor commands necessary for speech production and is typically found in the left hemisphere, which is responsible for language production in about 95% of the population. Damage to Broca's area may result in a type of aphasia known as expressive aphasia, characterized by compromised speech production and leading to non-fluent, broken, or halting speech. In contrast, damage to Wernicke's area can cause receptive aphasia, which affects the understanding of language content rather than its production.