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Book summary

Lisa Genova is a Harvard-trained neuroscientist and the author of several best-selling novels that deal with the maladies of the human brain, including Still Alice, which was adapted into an Academy Award-winning film starring Julianne Moore.

Muscle memory, distinct from semantic and episodic memory, is formed in the motor cortex through repetition, as illustrated by Henry Molaison, who, despite losing his hippocampus and the ability to form long-term memories, learned motor skills like mirror drawing. Similarly, the resilience of 678 Catholic nuns against Alzheimer’s symptoms, despite brain changes, highlights the importance of intellectual, social, and physical engagement in building neural pathways to combat memory decline. Sleep and stress management also play critical roles in memory health, as chronic deprivation or prolonged stress can impair hippocampal function. Memory’s dual nature—impressive yet fallible—is evident in phenomena like the "tip-of-the-tongue" effect, episodic memory distortions, and prospective memory failures, such as Yo-Yo Ma forgetting his cello. Forgetting, though often frustrating, is essential for mental well-being, as seen in Solomon Shereshevsky’s struggle with an overwhelming memory. Techniques like mnemonics, visualization, repetition, and external aids can enhance memory by leveraging the brain’s preference for stories and sensory associations, while tools like checklists and reminders help mitigate lapses in critical situations.

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