Causes

Pseudobulbar affect (PBA) typically occurs in people with neurological conditions or injuries, including:

• Stroke
• Amyotrophic lateral sclerosis (ALS)
• Multiple sclerosis (MS)
• Traumatic brain injury
• Alzheimer's disease
• Parkinson's disease

While further research is needed, the cause of PBA is believed to involve injury to the neurological pathways that regulate the external expression of emotion (affect).