Hyponatraemia-associated catatonia

Area of Science:

• Neurology
• Psychiatry
• Endocrinology

Background:

• Hyponatremia, or low sodium levels, is a common electrolyte imbalance.
• Electrolyte disturbances can significantly impact neurological and psychiatric function.
• Catatonia is a complex psychomotor syndrome with various potential underlying causes.

Observation:

• This case report describes a patient experiencing two separate episodes of catatonia.
• Both episodes were strongly associated with significantly depleted serum sodium levels (hyponatremia).
• The patient exhibited profound psychotic symptoms, including catatonia, during these periods.

Findings:

• The patient's catatonic symptoms and psychosis resolved completely upon normalization of serum sodium levels.
• This marks the first documented instance of two distinct, temporally unrelated episodes of hyponatremia-induced catatonia in the same individual.
• The findings highlight a direct correlation between sodium depletion and the manifestation of severe psychiatric symptoms.

Implications:

• This case underscores the critical importance of monitoring electrolyte balance, particularly sodium, in patients presenting with psychiatric disturbances.
• It emphasizes that hyponatremia should be considered in the differential diagnosis of catatonia and psychosis.
• Further research into the neurobiological mechanisms linking sodium levels and mental status is warranted.