When the frontal lobe is lesioned, this inhibition is removed and the reflexes return. TOP of Page Impairment of Social Behavior Since frontal lobe lesions result in a pervasive defect in planning and modulation of behavior, these patients have compelling deficits in maintining appropriate social responses. Social perception and action are very complex. Patients with frontal lobe lesions have great difficulty generating appropriate behavioral options in social situations and then choosing the best alternative. They also base their behavior on concrete simple motivations and cannot formulate or comprehend more complex or abstract reasons for acting.
Much social behavior requires a complex and abstract appreciation of the social setting.
TOP of Page Confabulation and Reduplication Syndrome Patients with severe frontal lobe lesions tend to fabricate quick, impulsive answers to questions. Some responses may be quite fanciful and imaginative. The patient cannot inhibit a response in order to check its validity. This tendency to fabricate an answer is called confabulation. It is most common among patients with basal forebrain lesions and among patients with additional impairment of memory ability.