Neurologist David Perlmutter evaluated Couric and detailed the mechanics of the condition for Katie Couric Media.
He noted that transient global amnesia presents as an isolated, temporary inability to form new memories while retaining general consciousness and identity.
"TGA is a sudden, temporary loss of the ability to form new memories," said Perlmutter.
"A person is awake, alert, knows who they are, recognizes family members, and can carry on a conversation, but they can't remember what just happened a few minutes ago."
The medical expert added that while the exact neurological cause remains unknown, events are frequently precipitated by sudden physical or emotional strains.
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Potential triggers include heavy lifting, temperature shifts, and strenuous exercise.
