title: Frequency and correlates of involuntary emotional expression disorder in Parkinson's disease.
abstract: Involuntary emotional expression disorder (IEED) is a syndrome characterized by involuntary episodes of emotional expression, particularly crying or laughing, that occur in patients with a neurological illness, including neuro-degenerative diseases. The authors assessed the frequency and clinical correlates of IEED among 131 patients with Parkinson's disease. IEED was present in 16.8% of patients overall and in 15.3% of depressed patients. The only clinical correlate of IEED diagnosis was greater severity of Parkinson's disease. The lack of an association between IEED and depression suggests that, in spite of some symptom overlap, the two disorders are distinct neuropsychiatric syndromes in Parkinson's disease.
authors.affiliation: Institute of Neuroscience Buenos Aires.
authors.forename: Gustavo M
authors.initials: GM
authors.lastname: Petracca
authors.forename: Ricardo E
authors.initials: RE
authors.lastname: Jorge
authors.forename: Laura
authors.initials: L
authors.lastname: Ación
authors.forename: Daniel
authors.initials: D
authors.lastname: Weintraub
authors.forename: Robert G
authors.initials: RG
authors.lastname: Robinson
mesh_terms: D000339:Affect; D000368:Aged; D019260:Expressed Emotion; D005260:Female; D006801:Humans; D007389:Internal-External Control; D008297:Male; D008875:Middle Aged; D019964:Mood Disorders / Q000150:complications* / Q000175:diagnosis*; D009460:Neurologic Examination; D010300:Parkinson Disease / Q000150:complications*; D010552:Personality Assessment; D011569:Psychiatric Status Rating Scales; D012044:Regression Analysis; D018709:Statistics, Nonparametric