Transient Global Amnesia primarily impairs formation of which memory type?

• A. Declarative memory
• B. Procedural memory
• C. Semantic memory
• D. Working memory

Answer: (A)

Transient Global Amnesia disrupts the ability to form new memories, specifically affecting declarative memory—the consciously accessible memory system that includes episodic (personal experiences) and semantic (facts) memory. In TGA, people can recall past events but cannot encode new ones, while procedural memory (skills and habits) and working memory (short-term holding and manipulation of information) are generally spared. The hippocampus and surrounding medial temporal networks underpin declarative memory formation, and transient dysfunction there explains this pattern.