[Monosynaptic excitation of motor neurons of the nucleus of the accessory nerve by reticulofugal impulses].

Responses of accessory motoneurons to electrical stimulation of the ipsilateral nucleus gigantocellularis of medullary reticular formation were recorded intracellularly in cats under chloraloze-nembutal anesthesia. The stimulation evoked in the accessory motoneurons monosynaptic EPSPs with latency from 0.6 to 1.0 ms, maximal amplitude 4.0 mV and duration 10 ms. Weak facilitation of EPSPs and absence of action potentials were demonstrated using paired shocks and rhythmic stimulation of the nucleus.