Dry Needling Produces Mild Injuries Irrespective to Muscle Stiffness and Tension in Ex Vivo Mice Muscles

Figure 3

Ex vivo dry needling in contracted healthy LAL muscle. (a) Muscles were contracted with a calcium-rich depolarizing medium (KCl/CaCl₂). In the different examples, more injured fibers can be seen than in the muscles with fibers with contraction knots seen in Figure 2 (initial magnification: 200x). (b) After a more powerful contraction by immersing the muscles in formalin. The needle separates most of the fibers and only few of them are sectioned. Arrowheads, muscle fiber injury points. Bracket, area with various lesions (initial magnification: 200x).

(a)

(b)