Comparison of personality traits in patients with frontal and temporal lobe epilepsies

The current study sought to characterize and compare personality traits of patients with temporal lobe epilepsy (TLE) and frontal lobe epilepsy (FLE). Ninety-seven adults with medically intractable epilepsy (TLE n=58, FLE n=39) completed the Personality Assessment Inventory (PAI) as part of routine preoperative investigations. Not surprisingly, both epilepsy groups endorsed significantly more symptoms across PAI clinical scales than the normative sample, most notably on scales assessing Depression and Somatic Complaints. Direct comparison of personality profiles of people with FLE and TLE revealed that FLE was associated with relative elevations on scales assessing emotional lability and relationship difficulties (i.e., Mania, Borderline Features, Antisocial, Stress, and Nonsupport). Although effect sizes were moderate to large, the clinical significance of these differences was questionable (<1 SD). However, results of a logistic regression suggested that the Borderline Features and Anxiety scales have incremental validity in predicting seizure site (FLE vs TLE) above education and duration of recurrent seizures. These results suggest that patients with FLE may exhibit more behavioral traits associated with frontal dysfunction than patients with TLE.