[Characteristics of the motor innervation of the larynx].

Electromyography revealed the larynx crossed motor innervation in dogs. Unilateral transection of the inferior laryngeal nerve or its branches caused disappearance of electrical activity in the denervated inner laryngeal muscles as well as immobility of the vocal cord at the transection side and its paramedian transposition. Within 6 or more months after the transection, the periodic electrical activity occurring mainly in the abductor muscles in inhalation and in abductor ones in exhalation, was restored.

[Role of sympathetic innervation of the upper respiratory tract in the reflex effects of its mechanoreceptors].

In anesthetized cats, stimulation of the mechanoreceptors of the pharynx, under--and subfold spaces of the larynx, and trachea evoked electrical responses in the peripheral and central parts of the cervical sympathetic nerve. Bilateral transection of the cervical sympathetic nerves diminished the respiratory and vasomotor reflexes from the mechanoreceptors. The signals from the receptors of the upper respiratory tract seem to reach the c.