treejay Posted October 14, 2012 Share Posted October 14, 2012 Will someone please explain how a Weber test will lateralize to the affected ear with conductive hearing loss? I'm not understanding the concept. It makes sense that it would lateralize away from the side with sensorineural loss, but lateralizing towards conductive loss? don't get that... Link to comment Share on other sites More sharing options...
Moderator LT_Oneal_PAC Posted October 14, 2012 Moderator Share Posted October 14, 2012 The inner ear and nerve are still working, but the ambient noise is dampened by the middle ear in conductive loss, so it sounds louder in comparison to the other ear. Link to comment Share on other sites More sharing options...
treejay Posted October 15, 2012 Author Share Posted October 15, 2012 The inner ear and nerve are still working, but the ambient noise is dampened by the middle ear in conductive loss, so it sounds louder in comparison to the other ear. hmm.... how much ambient noise can there be ? Link to comment Share on other sites More sharing options...
Moderator LT_Oneal_PAC Posted October 15, 2012 Moderator Share Posted October 15, 2012 Sorry if the answer doesn't satisfy you, but that is the answer. Plug one of your ears and do the webers, or you can even demonstrate this by plugging an ear and humming. Where do you hear the greatest sound? ETA: Note, it's note going to be a huge difference, but if you will notice that the sound feels just off of midline. Link to comment Share on other sites More sharing options...
Moderator LT_Oneal_PAC Posted October 15, 2012 Moderator Share Posted October 15, 2012 http://www.dartmouth.edu/~dons/part_1/chapter_6.html With conduction deafness, sound transmits best to the side of the deafness. This is thought to occur because ambient sound is prevented from getting to the cochlea on the blocked side. This causes the nervous system to amplify sounds on that side by sensitizing cochlear transduction. You can demonstrate this yourself by plugging an ear with your finger, causing conduction deafness, and then humming. The sound will be heard better on the occluded side. Link to comment Share on other sites More sharing options...
aferguson Posted October 15, 2012 Share Posted October 15, 2012 This. I didn't understand it until I plugged an ear, then it all made sense. Plug one of your ears and do the webers, or you can even demonstrate this by plugging an ear and humming. Where do you hear the greatest sound? Link to comment Share on other sites More sharing options...
treejay Posted October 16, 2012 Author Share Posted October 16, 2012 Sorry if the answer doesn't satisfy you, but that is the answer. Plug one of your ears and do the webers, or you can even demonstrate this by plugging an ear and humming. Where do you hear the greatest sound? ETA: Note, it's note going to be a huge difference, but if you will notice that the sound feels just off of midline. good call in plugging the ear. thanks, makes sense. Link to comment Share on other sites More sharing options...
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