The study demonstrates a plexiform pattern of multiple innervation with acetylcholinesterase activity in the fast-acting swimbladder muscle of the toadfish.
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No immediate clinical implications for cardiac muscle; leaves open whether plexiform innervation occurs in mammalian hearts.
Histochemical localization of the enzyme, acetylcholinesterase (AChE) methylene blue perfusion, and gold chloride were employed in studying the motor nerve innervation of the intrinsic striated muscle located in the wall of the swimbladder of the toadfish, Opsanus tau.2. A plexiform pattern of multiple innervation was revealed.3. Both preterminal nerve fibers and nerve terminals showed acetylcholinesterase activity.4. A wide variation of shape, size and distribution of nerve endings was seen. The endplates ranged from 2 µ to 70 µ in length and were spaced from 20 µ to 480 µ along a muscle fiber.
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Shenk et al. (1966) studied this question.
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