Stereotypic movement disorder after acquired brain injury

Area of Science:

• Neuroscience
• Psychiatry
• Movement Disorders

Background:

• Stereotypic movement disorder (SMD) is characterized by repetitive, non-functional motor behaviors that impair daily life or cause self-injury.
• While often associated with intellectual disability, recent evidence suggests SMD is prevalent in intellectually normal individuals.
• Acquired brain injury is an under-recognized potential cause of new-onset SMD.

Observation:

• This case study details a patient who developed new-onset SMD following a subdural hematoma and subsequent brain injury.
• SMD following acquired brain injury is rarely reported, and successful treatment documentation is even scarcer.
• The patient was intellectually normal prior to the brain injury.

Findings:

• The study reviews current psychiatric literature on the neurochemistry, neuroanatomy, and treatment of SMD.
• Potential treatment options discussed include serotonin re-uptake inhibitors, opioid antagonists, and dopamine antagonists.
• This case demonstrates that SMD can occur in intellectually normal individuals after brain injury.

Implications:

• SMD may be under-recognized in intellectually normal populations and following acquired brain injuries.
• Further research into the neurobiological underpinnings and effective treatments for SMD in these populations is warranted.
• Understanding SMD after brain injury could lead to improved diagnostic and therapeutic strategies for affected individuals.