Abstract
The purpose of this study was to investigate the response properties of the temporomandibular joint (TMJ) neurons in the trigeminal ganglion during cortically induced jaw movement of the rabbit. The discharges of TMJ units were recorded from the left trigeminal ganglion with metal microelectrodes. All TMJ units recorded in this experiment were slowly adapting type. The firing frequencies of TMJ units increased with displacement of the condyle movement in the jaw opening phase and returned to the initial response level in the jaw closing one. The TMJ neurons are assumed to carry sensory information about the jaw movement to the central nervous system in the jaw opening phase.
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