Subject: Re: Unilateral hearing loss From: Mark Shaver <mdshaver@xxxxxxxx> Date: Thu, 14 Apr 2011 09:56:44 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>This is a multi-part message in MIME format. --------------010706030004030201020100 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Shooting for right-handers may increase the magnitude for the ear effect but I believe it is also present when noise exposure is not known to be more pronounced on either side (Chung et al., 1983) <http://www.ncbi.nlm.nih.gov/pubmed/6853839>. It may be worth noting that there are asymmetries in olivocochlear function which others have suggested may relate to protection from noise. However, if I remember correctly these asymmetries were demonstrated in humans using contralateral suppression of TEOAEs which is representative of medial olivocochlear function. However, it seems that the lateral olivocochlear bundle is a better candidate for aiding in protection against noise. Mark Mark Shaver, PhD, CCC-A Clinical Educator/Audiologist Wichita State University Evelyn Hendren Cassat Speech-Language-Hearing Clinic (316) 978-6352 IMPORTANT NOTICE: This message is intended only for the use of the individual entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you have received this message in error, you are hereby notified that we do not consent to any reading, dissemination, distribution or copying of this message. If you have received this communication in error, please notify the sender immediately and destroy the transmitted information. On 04/14/2011 07:55 AM, Bob Masta wrote: > I don't know if this is relevant, but I have heard > audiologists say that it is well-known that (right-handed) > rifle shooters tend to have more left-ear loss, because > their head shields their right ear from the muzzle wave. > The opposite is the case for (right-handed) pistol > shooters. > > Is it possible that your colleague sees lots of military > (and former military) patients? The military uses mostly > rifles, not pistols, and most people are right-handed. > > Just a thought... > > Best regards, > > > Bob Masta > > > ================== > On 14 Apr 2011 at 12:56, Peter van Hengel wrote: > >> Dear list, >> >> a colleague of mine is very interested in unilateral hearing loss. He's been >> working in audiology for over 30 years and claims that in his experience it >> is much more common for the left ear to be affected than the right. >> Furthermore, if the right ear is affected, and the person is also >> right-handed, the problems with processing auditory information are much >> larger than in cases of left-sided hearing loss and/or left-handedness. >> However, he does not know of any publications on the subject. Is there >> anyone on the list who knows? >> >> All the best, >> Peter van Hengel >> Audiologisch Centrum Twente >> the Netherlands >> > Bob Masta > > D A Q A R T A > Data AcQuisition And Real-Time Analysis > www.daqarta.com > Scope, Spectrum, Spectrogram, Signal Generator > Science with your sound card! > --------------010706030004030201020100 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> Shooting for right-handers may increase the magnitude for the ear effect but I believe it is also present when noise exposure is not known to be more pronounced on either side <a href="http://www.ncbi.nlm.nih.gov/pubmed/6853839">(Chung et al., 1983)</a>. It may be worth noting that there are asymmetries in olivocochlear function which others have suggested may relate to protection from noise. However, if I remember correctly these asymmetries were demonstrated in humans using contralateral suppression of TEOAEs which is representative of medial olivocochlear function. However, it seems that the lateral olivocochlear bundle is a better candidate for aiding in protection against noise.<br> <br> <br> <br> Mark<br> <br> <br> <br> <div class="moz-signature">Mark Shaver, PhD, CCC-A <br> Clinical Educator/Audiologist <br> Wichita State University <br> Evelyn Hendren Cassat Speech-Language-Hearing Clinic <br> (316) 978-6352 <br> <br> IMPORTANT NOTICE: <br> This message is intended only for the use of the individual entity to which it is addressed and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you have received this message in error, you are hereby notified that we do not consent to any reading, dissemination, distribution or copying of this message. If you have received this communication in error, please notify the sender immediately and destroy the transmitted information.</div> <br> On 04/14/2011 07:55 AM, Bob Masta wrote: <blockquote cite="mid:20110414132228.CF6A6822C@xxxxxxxx" type="cite"> <pre wrap="">I don't know if this is relevant, but I have heard audiologists say that it is well-known that (right-handed) rifle shooters tend to have more left-ear loss, because their head shields their right ear from the muzzle wave. The opposite is the case for (right-handed) pistol shooters. Is it possible that your colleague sees lots of military (and former military) patients? The military uses mostly rifles, not pistols, and most people are right-handed. Just a thought... Best regards, Bob Masta ================== On 14 Apr 2011 at 12:56, Peter van Hengel wrote: </pre> <blockquote type="cite"> <pre wrap="">Dear list, a colleague of mine is very interested in unilateral hearing loss. He's been working in audiology for over 30 years and claims that in his experience it is much more common for the left ear to be affected than the right. Furthermore, if the right ear is affected, and the person is also right-handed, the problems with processing auditory information are much larger than in cases of left-sided hearing loss and/or left-handedness. However, he does not know of any publications on the subject. Is there anyone on the list who knows? All the best, Peter van Hengel Audiologisch Centrum Twente the Netherlands </pre> </blockquote> <pre wrap=""> Bob Masta D A Q A R T A Data AcQuisition And Real-Time Analysis <a class="moz-txt-link-abbreviated" href="http://www.daqarta.com">www.daqarta.com</a> Scope, Spectrum, Spectrogram, Signal Generator Science with your sound card! </pre> </blockquote> </body> </html> --------------010706030004030201020100--