The cortical motor hand area is a knob-like structure of the precentral gyrus. with an inverted omega or horizontal epsilon shape. Isolated hand weakness is infrequently observed and is usually due to small cortical infarcts of this hand knob structure. Isolated hand palsy is sometimes restricted to radial-sided fingers or ulnar sided-fingers. https://storeanimalwiz.shop/product-category/tick-shampoos/