Questions related to Hearing Research
I've read in many articles that cochleogram was made from the basal, medial and apical part of the Organ of Corti. I would like to know where the border is between basal and medial part, in addition, between medial and apical part in a mouse. For example, the first 40% of the basilar membrane is the basal part, the next 30% is the medial part and the last 30% is the apical part.
Do you know it? I've tried to find it but I haven't found the answer yet.
Many studies reported an association between nutrition and human hearing loss. These studies showed the incidence of hearing loss was increased with the lack of micro-nutrients such as vitamins A, B, C, E, zinc, magnesium, selenium and iron.Moreover, high carbohydrate, fat, and cholesterol intake, or lower protein intake, are responsible for poor hearing status.
Dear colleagues, Any more studies or experience about the relation between nutrition and hearing loss?
Hello everyone, I'm currently working on a project about auditory hearing loss research in zebrafish. We need to use anti-vibration tables so we can get the best result of auditory signals. Does anyone know what types and brands of anti-vibration tables are being used in current auditory research? Thanks
Hi, I have a patient. she is 4 years old. Her hearing loss has been diagnosed 1 and half year a go. She has a severe to profound hearing loss. Parents claim that she was OK before and she gradually has lost her hearing. As there was not any previous hearing evaluation (even no hearing screening at birth!), we can not confirm that. She received hearing aid and auditory rehabilitation right away. Since then she has had 3 sudden reduction of hearing to profound hearing loss (parents recognize that because she do not react to sound at all with her hearing aid).
Otologist prescribed corton therapy and ketotifen... for two weeks in first two episodes. She had cold in one of them. She showed recovery after that. Today she came to me with same problem (again sudden reduction of hearing to profound and no reaction to sound).
What do you think is the underlying cause? (some thing is wrong for sure)
Can it be an autoimmune disease? (she seems totally normal and her blood test is normal)
Parents ask me is there a neural problem or cochlear? (How can I be sure?!)
Parents ask me if cochlear implant will resolve the problem?
Please help us. Thank you
Hi, I have noticed that electrocochleography shows endolymphatic hydropse in quite large population who suffer from vertigo. Some times this result is not accompanied by low tone loss. What can be the reason? Is there possible that some drugs that patient has taken or any other exogenic material makes temporary hydropse in inner ear? Do you suggest any special diet before EcochG test??
We have a lot of malingers in our setting. they pretend that they suffer from vertigo. Internet is full of information about vertigo so they can easily pretend to have vertigo. Many times VNG (video nystagmography) shows totally normal results but EcochG shows high SP/AP. How we can be sure this high SP/AP is indicative of Meniere's disease?
My mice (10 weeks,male/female, BL6 background) show decreased startle response in the acoustic startle paradigm.
How can I test hearing capability in a non-invasive and non-cognitive based approach ?
thanxc in advance, regards, Roland
Would we expect a high frequency adapter to have any effect on a low frequency target in a horizontal localization task? I mean in comparison to a low frequency adapter and a low frequency target. Does anybody know of any studies on these types of interaction? Sometimes a clue close enough to this can point me in the right direction if I follow the breadcrumbs.
Thank you very much in advance
I am asking this because Iam wondering that why the CI has a high signal rates?. If there ıs a lımıtatıon for 5000 spike/sn then we don't need so high impulse rates for Cochlear implants. I just looked for that and there are two opinon one is says that maximum rate is 1000 spike/sn the other one is 5000 spike/sn. The last one comes from Rutherfords hearing theory. We know that this theory is wrong because over 5000 Hz this theory can't work depending on the maksimum response for the cohlea..
Also, how reliable are BIC responses? Stollman et al (1996) article mentions a detection rate of 95-97%. Any personal or clinical experiences?
There is a current discussion about how to define and measure listening effort. I stumbled over a measure called 'acceptable noise level' (ANL, see e.g. Nabelek et al, 2006). How much does the research community think that ANL is associated with listening effort? Some researchers already answered me that listening effort has nothing to do with ''the comfort of listening" but I am not quite sure I would agree.
One of my students is doing a research with mothers of hard of hearing children and their children. We want to use collaborative story telling and dialogic reading
In my institute (KAUH, KSU, RIYADH, KSA), during the work with my colleagues, CI surgeons (Prof. Al-Muhaimeed & Prof. Attallah, of the oldest & the best CI surgeons in KSA), we faced difficult cochleostomy despite a normal patent cochlea as confirmed by preoperative CT-Temporal.
2009, Of my knowledge, the above mentioned colleagues et al are the first worldwide who mentioned the explanation of this dilemma, mentioning a tilted (rotated cochlea) in their published article:
"Al-Muhaimeed HS, Al-Anazy F, Attallah MS, Hamed O. Coclear mplantation at King Abdulaziz University Hospital, Riyadh, Saudi Arabia: a 12-year experience. J Laryngol Otol 2009; 123:e20."
2010, Lloyd et al suggested a predictive tool which could diagnose a rotated cochlea by the preoperative CT-Scan, axial temporal bone, measuring the cochlear basal turn angle (BTA) in their published article:
"Lloyd SK, Kasbekar AV, Kenway B, Prevost T, Hockman M, Beale T,
Graham J Developmental changes in cochlear orientation – implications
for cochlear implantation. Otol Neurotol 2010; 31:902–907."
2015, of my knowledge, My colleague (Prof. Al-Muhaimeed HS) & I (Abdelwahed HY) were the first worldwide who investigated retro-prospectively the above mentioned predictive tool of Lloyd et al (BTA) & found that it was indicator & we suggested the solution to make cochleostomy more easy in such encountered difficult cases as mentioned in our published article:
"Al-Muhaimeed H S & Abdelwahed H Y. Difficult cochleostomy in the normal cochlea, Egypt J Otolaryngol, 2015 Jul, 31(3): 149-155. DOI: 10.4103/10125574.159791. Source: http://www.ejo.eg.net/preprintarticle.asp?id=159791. 1012-5574 © 2015 The Egyptian Oto - Rhino - Laryngological Society.'
I hope that all worldwide CI surgeons share my topic with their valuable comment & experiences regarding this important topic.
What is the advantage of using dBnHL over dBpeSPL. The description of dBnHL, I understand that it is calculated by taking the difference between dB peSPL and behavioral threshold @ one repetition rate. If we are calculating at one rate how has this value been generalized for other reputation rate (30.1/sec, 90.1/sec). From the psycho-acoustics it is understood that behavioral threshold is better at higher rate (90.1/sec) than lower rate. Are there any standards which specify which rate should be used and why.
This question aims to point out the difficulties that hearing impaired face in social life, in despite all the efforts made and different approaches taken to help them. Emphasizing the necessity of self-reliance of the hearing-impaired in social life and their substantial participation in the sustainable development of community, this question introduces.
I am researching the correlation of development indices, e.g., HDI, IHDI and Gini, and percentage of Deaf population in total population.
What does the term "contralateral reflex" with respect to the right ear in the case of acoustic stapedial measurements in routine clinical situations mean?
Since there are two different views regarding which ear is to be the stimulus ear and probe ear, please specify.
And while testing reflex decay in the right ear, which contralateral reflex threshold is to be taken?
I was wondering if anyone had done (or knows of) research into inferential learning in cochlear implantees. My current understanding is that most literature says deaf children (which also implies adults) cannot overhear conversations which they are not a direct participant in, and so miss out on information which hearing people have access to. Most of the literature I've seen is from the educational fields, and so they suggest methods of educating to help avoid the impact of not being able to do this. Now, through personal experience I have met some young children who were implanted early enough that they can 'overhear'. Also, as a recent (5 years ago) implantee myself, I'm beginning to find I can do this sometimes, but its more of a 'cocktail party effect' than true 'overhearing'. So the words/sentences have to be very salient or obvious in a linguistic way (i.e. no other possibilities).
I am wondering whether this is an ability that could be trained, and if so how would that even be attempted? I see some parallels with divided attention topics over in cognitive psychology, and I am thinking about this being my topic for my MSc in 2014, but wondering if it might be a wee bit too large a scope. I am not even sure how to even measure it at this point.
For example, in spaces with different temperatures:
Sound speed at 10 degrees Celsius and 50% relative humidity = 337 m/s.
Sound speed at 40 degrees Celsius and 50% relative humidity = 356 m/s.
If we have a calibrated objects vibrating at 1000 cycles per second in the cool room and the hot room, the wavelengths are 33.7 cm and 35.6 cm respectively. If sound speed was a constant 343 m/s, these wavelengths would equate to frequencies of 1017.8 and 960.8 Hz, definitely a perceivable difference. However, since the temperature differs, these different wavelengths both equate to 1000 Hz at the ear. If we perceive pitch from frequency, then these conditions will be heard as the same, but if we perceive pitch from wavelength, they will be heard differently. It seems that perception of wavelength would necessarily be binaural, since at one ear, coding is only frequency dependent.
Can we hear the difference between the same tone in a cold space and a hot space?
The wavelengths of the same frequency are substantially different in air and water. Do humans utilize wavelength in auditory pitch perception? This would also apply to rooms/places with substantially different air temperatures, and has implications for understanding auditory localization.
Humans aren’t the only ones who lose their hearing as they grow older. Scientists report that wild Indo-Pacific humpback dolphins (Sousa chinensis), which can live 40-plus years, also have trouble picking up sounds as they age.