Ruggedized Portable Instrumentation Package for Marine Mammal Evoked Potential Hearing Measurements

2012 ◽  
Author(s):  
Paul E. Nachtigall
Keyword(s):  
Marine Mammal ◽  
Evoked Potential ◽  
Portable Instrumentation

Rapid acquisition of marine mammal evoked potential audiograms by stranding networks.

2010 ◽  
Vol 128 (4) ◽  
pp. 2299-2299
Author(s):  
Dorian S. Houser ◽  
Kathleen Moore ◽  
Sarah Sharp ◽  
James J. Finneran
Keyword(s):  
Marine Mammal ◽  
Evoked Potential ◽  
Rapid Acquisition

Histological evaluation of cochlear hair cell damage from noise-induced hearing loss in chinchillas

1990 ◽  
Vol 48 (3) ◽  
pp. 332-333
Author(s):  
R.V. Harrison ◽  
R.J. Mount ◽  
P. White ◽  
N. Fukushima
Keyword(s):  
Hair Cell ◽  
Evoked Potential ◽  
Cell Damage ◽  
Acoustic Trauma ◽  
Histological Evaluation ◽  
Cell Integrity ◽  
Functional Changes ◽  
Cochlear Hair Cell ◽  
Left And Right ◽  
Contralateral Ear

In studies which attempt to define the influence of various factors on recovery of hair cell integrity after acoustic trauma, an experimental and a control ear which initially have equal degrees of damage are required. With in a group of animals receiving an identical level of acoustic trauma there is more symmetry between the ears of each individual, in respect to function, than between animals. Figure 1 illustrates this, left and right cochlear evoked potential (CAP) audiograms are shown for two chinchillas receiving identical trauma. For this reason the contralateral ear is used as control.To compliment such functional evaluations we have devised a scoring system, based on the condition of hair cell stereocilia as revealed by scanning electron microscopy, which permits total stereociliar damage to be expressed numerically. This quantification permits correlation of the degree of structural pathology with functional changes. In this paper wereport experiments to verify the symmetry of stereociliar integrity between two ears, both for normal (non-exposed) animals and chinchillas in which each ear has received identical noise trauma.

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