Amnestic Disorders

AMNESTIC DISORDERS


AMNESTIC DISORDERS

  • Broad category including variety of conditions presenting amnestic syndrome.

Features:

  • Characterized by inability to form new memories (anterograde amnesia) & inability to recall previously remembered knowledge (retrograde amnesia).
  • Short-term & recent memory – Impaired with preservation of remote & immediate memory.

Causes:

Major causes:

  • Thiamine deficiency (Korsakoff syndrome).
  • Hypoglycemia.
  • Primary brain conditions (head trauma, seizures, cerebral tumors, cerebrovascular disease, hypoxia, electroconvulsive therapy, multiple sclerosis).
  • Substance related disorders (alcohol, benzodiazepines).

Exam Important

  • Major causes of amnestic disorders are thiamine deficiency (Korsakoff syndrome), hypoglycemia, primary brain conditions (head trauma, seizures, cerebral tumors, cerebrovascular disease, hypoxia, electroconvulsive therapy, multiple sclerosis).
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