The extensively studied amnestic patient H.M.
has lost his declarative memory after sustaining damage to both temporal lobes. After hearing of his father's death for the hundredth time, he is piteously distressed as he was the first time. But he can still learn habits and nondeclarative motor skills, such as riding a bicycle.- Alice W. Flaherty, The Midnight Disease, p.100
Image source here.
