[Olfactory evoked potentials produced by electrical stimulation of the olfactory mucosa].
OBJECTIVE
To develop an objective olfactometric method.


METHODS
Electrically evoked olfactory potentials were recorded in 20 rabbits with 0.2-4.0 mA electrical stimulations. The stimulating electrodes were placed on the olfactory and respiratory regions of the nasal mucosa. Recording electrode was placed on the scalp near the olfactory bulb.


RESULTS
Electrically evoked olfactory potentials composed of triphasic negative-positive-negative peaks, named N1, P1, N2 respectively, were detected on the olfactory region. The latencies of N1, P1, N2 were 16.27 ms, 25.36 ms, 49.75 ms respectively in cribriform plate. No electrically evoked potentials were detected on the respiratory mucosa, nor did on the olfactory mucosa after olfactory neurectomy.


CONCLUSIONS
Steady and clear electrically evoked olfactory potentials which originated from olfactory neurosystem were detected on olfactory mucosa in rabbits.
Xu
C
C
Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730.
Ni
D
D
Li
F
F
D000818:Animals; D004558:Electric Stimulation / Q000295:instrumentation / Q000379:methods; D005071:Evoked Potentials; D005260:Female; D008297:Male; D009831:Olfactory Mucosa / Q000294:innervation / Q000502:physiology*; D009832:Olfactory Nerve / Q000502:physiology*; D009833:Olfactory Pathways / Q000502:physiology; D011817:Rabbits