Finger Strength, Individuation, and their Interaction: Relationship to Hand Function and Corticospinal Tract Injury after Stroke

Many activities of daily living require dexterous use of the fingers, such as opening a door, buttoning a shirt, and holding a fork. Such activities often become more effortful and slower after a stroke, and sometimes impossible to achieve with the hemiparetic hand. Thus, approximately 50% of the 700,000 individuals who survive a stroke each year in the U.S. have persistent upper extremity impairment (Dobkin, 1996; Heller et al., 1987; Ma et al., 2014; Warabi et al., 1990). Understanding the pathophysiological mechanisms that cause reduced hand function is essential for targeting stroke therapies.

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