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Pseudobulbar affect. Deniz Erten-Lyons, Staff Neurologist Portland VA Medical Center. What is pseudobulbar affect?. A neurological disorder that occurs secondary to damage to emotional pathways in the brain.
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Pseudobulbar affect Deniz Erten-Lyons, Staff Neurologist Portland VA Medical Center
What is pseudobulbar affect? • A neurological disorder that occurs secondary to damage to emotional pathways in the brain. • Episodes of laughing or crying that are uncontrollable and unpredictable with little or no relationship to a person’s emotions.
PBA-other names • Involuntary emotional expression disorder • Emotional lability • Emotional incontinence • Pathological crying or laughing
What patients experience? • Sudden and unpredictable attacks of laughing • Duration of a few seconds to several minutes • Outbursts may happen several times a day. • Magnitude of the response is too extreme for the situation, or it may be inappropriate for the setting - such as crying at a funny movie.
PBA in MS • 5229 patients with MS • 48% exhibited symptoms of PBA • One in seven patient felt episodes were extremely or very burdensome • One third felt episodes interfered with spending time with family and friends • One in four felt symptoms made it difficult to make and keep friends. • One in five felt that PBA contributed to being housebound Results of survey administered by Avanir and Multiple Sclerosis Association
Impact on patients and families • While not physically disabling, PBA effects an individuals social functioning and their relationship with others. • Embarrassment and social withdrawal • May interfere with activities of daily living, social and professional pursuits
Distinct from depression • In depression crying is a sign of grief and sadness. • In PBA crying may occur unrelated to the mood or out of proportion of the mood. • Crying in PBA occurs suddenly, occurring in brief episodes where as crying in depression will continue longer. • Other features that support depression such as negative view of self, sadness, worrying, apathy long duration of weeks to months, appetite loss, difficulty sleeping.
What diseases cause PBA? • Multiple Sclerosis (10% of patients with MS) • Amyotrophic Lateral Sclerosis • Stroke • Traumatic Brain Injury • Parkinson’s disease • Alzheimer’s disease • Other less common neurological disorders
Mechanism in PBA • Disruption of pathways in the brain that link centers that regulate voluntary control of emotion with the centers of laughing/crying in the brainstem.
Treatments • Coping without medications: • Being open about the problem so others know what is going on. • Distraction, breathing techniques, relaxation • Medications: • Nuedexta™(dextromethorphan/quinidine) (20mg/10mg) • Adverse affects: nausea, dizziness, gastrointestinal complaints, muscle cramps, weakness, swelling, elevated liver enzymes. • Other medication • Amitriptyline, nortriptyline • Selective serotonin reuptake inhibitors