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Potassium ion conductance of the cochlear partition: differences between the chinchilla and guinea pig.
Hear Res. 1988 Jul 15; 34(2):193-6.HR

Abstract

The time courses of the endocochlear potential (EP) and the K+ concentrations in the inner ear fluid under permanent anoxia were observed in the chinchilla and guinea pig using K+-selective microelectrodes. The EP following 30 min of anoxia in the chinchilla (-10.9 +/- 2.2 mV) showed a significantly less negative value than that of the guinea pig (-25.7 +/- 2.6 mV). The K+ concentration in endolymph induced by anoxia decreased less in the chinchilla than in the guinea pig. The average K+ conductance of the cochlear partition 10-30 min after anoxia in the guinea pig (0.1703 +/- 0.0792 S) was approximately 7.9 times that of the chinchilla (0.0216 +/- 0.0042 S), which is thought to be responsible for the difference of the anoxic EP between the two species.

Authors+Show Affiliations

Department of Otolaryngology, University of Minnesota, Minneapolis 55414.No affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

3170361

Citation

Ikeda, K, and T Morizono. "Potassium Ion Conductance of the Cochlear Partition: Differences Between the Chinchilla and Guinea Pig." Hearing Research, vol. 34, no. 2, 1988, pp. 193-6.
Ikeda K, Morizono T. Potassium ion conductance of the cochlear partition: differences between the chinchilla and guinea pig. Hear Res. 1988;34(2):193-6.
Ikeda, K., & Morizono, T. (1988). Potassium ion conductance of the cochlear partition: differences between the chinchilla and guinea pig. Hearing Research, 34(2), 193-6.
Ikeda K, Morizono T. Potassium Ion Conductance of the Cochlear Partition: Differences Between the Chinchilla and Guinea Pig. Hear Res. 1988 Jul 15;34(2):193-6. PubMed PMID: 3170361.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Potassium ion conductance of the cochlear partition: differences between the chinchilla and guinea pig. AU - Ikeda,K, AU - Morizono,T, PY - 1988/7/15/pubmed PY - 1988/7/15/medline PY - 1988/7/15/entrez SP - 193 EP - 6 JF - Hearing research JO - Hear Res VL - 34 IS - 2 N2 - The time courses of the endocochlear potential (EP) and the K+ concentrations in the inner ear fluid under permanent anoxia were observed in the chinchilla and guinea pig using K+-selective microelectrodes. The EP following 30 min of anoxia in the chinchilla (-10.9 +/- 2.2 mV) showed a significantly less negative value than that of the guinea pig (-25.7 +/- 2.6 mV). The K+ concentration in endolymph induced by anoxia decreased less in the chinchilla than in the guinea pig. The average K+ conductance of the cochlear partition 10-30 min after anoxia in the guinea pig (0.1703 +/- 0.0792 S) was approximately 7.9 times that of the chinchilla (0.0216 +/- 0.0042 S), which is thought to be responsible for the difference of the anoxic EP between the two species. SN - 0378-5955 UR - https://www.unboundmedicine.com/medline/citation/3170361/Potassium_ion_conductance_of_the_cochlear_partition:_differences_between_the_chinchilla_and_guinea_pig_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0378-5955(88)90106-2 DB - PRIME DP - Unbound Medicine ER -