Abstract
One Year after transection of the left superior and recurrent laryngeal nerves of cats reflex arcs between the internal branch of the right superior laryngeal nerve and the left intrinsic laryngeal muscles were recognized electromyographically. Possible participation of the right recurrent laryngeal nerve, the bilateral vagosympathetic trunks, and the left superior cervical ganglion and nodose ganglion was suggested. Moreover, the reflex arcs between the internal branch of the right superior laryngeal nerve and the right, intact intrinsic laryngeal muscles were recognized despite the transection of the right recurrent laryngeal nerve. At the neuromuscular junctions of the right, intact intrinsic laryngeal muscles an increase in the size of postsynaptic area devoid of nerve terminals was observed.
