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It also notes that the 11 best in class nootropics were selected because they are complementary, research supported, and generally well tolerated

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stiffness and resistance to limb movement caused by increased muscle tone and/ gait and posture disturbances such as festination (rapid shuffling steps and a forward-flexed posture when walking), speech and swallowing disturbances including voice disorders, masklike face expression or small handwriting, although the range of possible motor problems that can appear is large

[DOI] [PubMed] [Google Scholar] Robert A, Nezamis JE, Lancaster C, Hanchar AJ