[Bilateral infarction of the caudate nuclei]

Area of Science:

• Neuroscience
• Neurology
• Cognitive Psychology

Background:

• The caudate nucleus, a key component of the basal ganglia-thalamo-cortical circuitry, plays a crucial role in cognitive functions and behavior.
• Damage to the caudate nucleus can disrupt essential cortical-subcortical connections, potentially leading to significant neurological and psychological impairments.

Observation:

• A 57-year-old woman with hypertension presented with sudden onset of behavioral and cognitive abnormalities, including attention deficits, memory impairment, apathy, and left hemiparesis.
• Neuropsychological testing revealed significant deficits in cognitive functions.
• CT scans indicated infarction in the heads of both caudate nuclei and the right internal capsule.

Findings:

• Bilateral caudate nucleus infarction resulted in profound cognitive and behavioral deficits, impacting attention, memory, spontaneity, and initiative.
• Despite partial recovery over two years, apathy persisted, and psychometric evaluation showed a significantly reduced IQ (57).
• The observed deficits underscore the critical role of the caudate nuclei in maintaining normal cognitive and behavioral functioning.

Implications:

• This case highlights the significant impact of caudate nucleus damage on cognitive and behavioral domains, emphasizing its importance in brain function.
• Understanding the role of the caudate nucleus in cortical-subcortical circuits is crucial for diagnosing and managing neurological disorders affecting these areas.
• Further research into basal ganglia-thalamo-cortical circuitry can provide insights into the mechanisms underlying cognitive and behavioral disorders.