[Electrophysiologic study of murine spiral ganglion neurons].
OBJECTIVE
To explore the nature of voltage dependent ion channels and basic electrophysiological characteristics of cochlear spiral ganglion neurons of apical and basal turn by patch clamp techniques of whole cell configure on murine spiral ganglion neurons.


METHODS
Different voltage dependent ionic currents were recorded with patch clamp techniques of whole cell configure on the condition of different internal electrode solution, blockers and stimulus protocol.


RESULTS
Inward sodium channel current (I(Na)), hyperpolarization-activated inward cationic current (Ih), outward delay rectification potassium current (I(K)) and outward transient potassium current (I(A)) were recorded ,significant difference of electrophysiological characteristics of I(A) and I(K) was found between apical and basal turns (P < 0.05).


CONCLUSIONS
Various ionic currents are recorded, which shows that spiral ganglion neurons have the base of ionic channels to complete formation,conduction and modulation of action potential for auditory information transduction, the difference of electrophysiological characteristics between apical and basal turns contributes to the course of hearing formation.
Fan
Jiangang
J
Department of Otorhinolaryngology, People's Hospital of Sichuan Province, Chengdu, 610072, China. mrfjg@21cn.com
Tang
Yuedi
Y
Liang
Chuanyu
C
D000818:Animals; D002478:Cells, Cultured; D007473:Ion Channels / Q000502:physiology*; D008564:Membrane Potentials / Q000502:physiology; D051379:Mice; D008815:Mice, Inbred Strains; D009474:Neurons / Q000502:physiology*; D018408:Patch-Clamp Techniques; D013136:Spiral Ganglion / Q000502:physiology*
D007473:Ion Channels