Final answer:
Impaired decision-making is a likely result of a frontal lesion in the orbital region due to the role this area plays in planning, judgment, and reasoning.
Step-by-step explanation:
Neuropsychological manifestation of a frontal lesion in the orbital region may result in impaired decision-making. The prefrontal cortex, which includes the orbitofrontal cortex, is responsible for functions such as planning, judgment, reasoning, and working memory. Damage to this area can lead to difficulties in decision-making, changes to personality, mood, and behavior. In contrast to options such as memory deficits and visual or auditory processing disorders, these are more commonly associated with lesions in the temporal lobe, particularly the medial temporal lobe structures like the hippocampus and amygdala. Visual and auditory impairments are also commonly linked to disruptions in the occipital lobe or specific parts of the temporal lobe, not the orbital region of the frontal lobe.