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Correspondence  |   September 2003
Anatomic and Physiologic Discrepancies in Perioperative Hearing Impairment
Author Notes
  • Santa Clara Valley Medical Center, San Jose, California.
Article Information
Correspondence
Correspondence   |   September 2003
Anatomic and Physiologic Discrepancies in Perioperative Hearing Impairment
Anesthesiology 9 2003, Vol.99, 757-758. doi:
Anesthesiology 9 2003, Vol.99, 757-758. doi:
To the Editor:—
I want to commend the authors on writing an excellent article on a topic that has not been discussed much in anesthesia circles and meetings. 1 I did come across some deficiencies in the section labeled Brief Overview of Anatomy and Physiology. In figure 2 of the article, the structure labeled as the outer hair cell is actually the inner hair cell, and the structure labeled as the inner hair cell is not the inner hair cell. Please refer to the current Figure 1for the correct labeling of the outer and inner hair cells.
Fig. 1. Magnified cross-section of Organ of Corti. Three rows of outer and single row of inner hair cells as labeled.
Fig. 1. Magnified cross-section of Organ of Corti. Three rows of outer and single row of inner hair cells as labeled.
Fig. 1. Magnified cross-section of Organ of Corti. Three rows of outer and single row of inner hair cells as labeled.
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The inner hair cells number about 3,500 in each ear and are present in a single row. The outer hair cells number about 20,000 in each ear and are present in three rows. Ninety to 95% of afferent innervation in the cochlear nerve comes from the inner hair cells, versus 5–10% from the outer hair cells. 2 The inner hair cells are mainly responsible for transforming the acoustic signal to neural signal, whereas the role of the outer hair cells is secondary and supportive.
References
Strung J, Bourke DL, Contreras MG, Warner ME, Findlay J: Perioperative hearing impairment. A nesthesiology 2003; 98: 241–57Strung, J Bourke, DL Contreras, MG Warner, ME Findlay, J
Ganong WF: Hearing and equilibrium, Review of Medical Physiology, 20th edition. Lange Medical Books/McGraw-Hill Medical Publishing Division, Lahore, New Jersey 2001; pp 166–79
Fig. 1. Magnified cross-section of Organ of Corti. Three rows of outer and single row of inner hair cells as labeled.
Fig. 1. Magnified cross-section of Organ of Corti. Three rows of outer and single row of inner hair cells as labeled.
Fig. 1. Magnified cross-section of Organ of Corti. Three rows of outer and single row of inner hair cells as labeled.
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