Figure 3.

Light microscopic images of mouse skeletal muscle fibers obtained by TPNB. The procedure preserves the fiber organization and some of the accessory component of the muscle. (A) Terminal branches of nerve endings in proximity of neuromuscular junction in the masseter muscle. (B) Some small blood vessels (arrowheads) and a big vessel with blood cells (arrow), together with a satellite cell (double arrowhead), are still visible on the masseter fiber surface. (C) Gastrocnemius muscle fiber showing the regular pattern of striation without contractures.