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About Daniel J. Bosnyak, PhD
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Expertise
I am a neuroscientist and experimental psychologist who specializes in the study of Tinnitus (ringing of the ears). Our laboratory focuses on trying to understand what causes the tinnitus sensation, which we believe is an important first step in developing a cure for this debilitating illness. We believe that in many cases the sensation is generated as a result of changes in brain organization resulting from mild or moderate hearing loss, a phenomenon known as 'cortical plasticity' and akin in some ways to phantom limb pain. Although we do not offer treatment for tinnitus patients at this time, I do attend most of the worldwide conferences on Tinnitus and I am aware of most of the recent advances in treatment methodologies. Our research has been supported by the American Tinnitus Association, the Canadian Institute for Health Research and the Tinnitus Research Initiative.

Experience
As a research scientist and Adjunct Assistant Professor in the department of Psychology, Neuroscience and Behaviour at McMaster University I have been studying tinnitus and associated phenomena for several years.

Publications
Bosnyak, D. J., Gander, P. E., & Roberts, L. E. (2007). Does auditory discrimination training modify representations in both primary and secondary auditory cortex. New Frontiers in Biomagnetism. International Congress Series (pp. 25-28). Amsterdam: Elsevier Science. Roberts LE, Moffat G, Baumann, M, Ward LM, and Bosnyak DJ (2007). Residual inhibition functions overlap tinnitus spectra and the region of auditory threshold shift. Journal of Research in Otolaryngology. Roberts, L.E., Moffat, G., & Bosnyak, D. J. (2006). Residual inhibition functions in relation to tinnitus spectra and auditory threshold shift. Acta Otolaryngologica, 126, 27-33 Bosnyak D.J., Leone A.M., Gander P.E., Roberts L.E. (2007). Responses in the primary auditory cortex in tinnitus sufferers after induction of residual inhibition by masking sounds. Annual meeting of the Canadian Association for Neuroscience, Toronto, May 23-25.

Education/Credentials
MCMASTER UNIVERSITY PhD, Psychology, 2003. Hons B.A., Psychology, 1994, Summa Cum Laude

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Subject	Date Asked	Expert

Sudden hearing loss, tinnitus, distortion	11/15/2009	Daniel J. Bosnyak, PhD
Q: I am profoundly deaf in one ear, and somewhat in the other. About 3 weeks ago my tinnitus became ... A: Saranne, The fact that sounds are now uncomfortably loud does sound a lot like recruitment. ...
Tinnitus	11/13/2009	Daniel J. Bosnyak, PhD
Q: I have had a high pitched tinnitus for a month at this point. I saw an ENT and he said that he ... A: The "feeling full and fluttering" sounds possibly like eustachian tube dysfunction. Have a look at ...
ringing ears	10/28/2009	Daniel J. Bosnyak, PhD
Q: About five weeks ago i got a ringing in my left ear, it was a steady high pitch sound, it lasted ... A: It sounds like something might be physically blocking either the ear canal or the Eustachian tube in ...
Ringing after Ossiculoplasty	10/26/2009	Daniel J. Bosnyak, PhD
Q: I had middle ear surgery/Ossiculoplasty in Dec. 2008. Ever since, I have had a ringing in the same ... A: First I cant really recommend a specific treatment without knowing a lot more about your situation. ...
Ringing after Ossiculoplasty	10/26/2009	Daniel J. Bosnyak, PhD
Q: I had middle ear surgery/Ossiculoplasty in Dec. 2008. Ever since, I have had a ringing in the same ... A: Tim, I have seen a very similar case just recently. The constant ringing is known as tinnitus. ...
Hearing loss	10/26/2009	Daniel J. Bosnyak, PhD
Q: How is hearing lost due to loud noises? Thanks for the help Regards Jeff A: Jeff, That is a very good question, and one that scientists are only beginning to fully understand ...
Tinnitus - Motor Sound	10/23/2009	Daniel J. Bosnyak, PhD
Q: I am hearing lot of cutting metal sound and sounds which are very similar when i was having my MRI ... A: Jason, It sounds like your ear infection has caused some hopefully temporary hearing loss in the ...
re: eustacian tinnitus	10/19/2009	Harriet B Jacobster, Au.D.
Q: I blew my nose a little hard on Friday evening, and had sudden 'clogged' and stuffy feeling in my ... A: I'm sorry, but I cannot give you any reassurance that the tinnitus will go away. It may or it may ...
hearing loss	10/17/2009	Harriet B Jacobster, Au.D.
Q: I am 40 years old. Last June I had a dizzy feeling and it was determined to be due to wax build up ... A: There are so many possible diagnoses...middle ear fluid, eustachian tube dysfunction, nerve damage, ...
hearing problem	10/16/2009	Harriet B Jacobster, Au.D.
Q: I am 47 year old female, I am feeling imense noise in my one year and I am not able to hear anytjing ... A: If your ENT only did a hearing test, then he did not do a complete evaluation. With the symptoms ...
Inflammation of ear nerves by cayenne pepper	10/15/2009	Harriet B Jacobster, Au.D.
Q: I did a stupid thing four weeks ago. I dipped a cotton swab in cayenne pepper tincture (made from ... A: Don't add to your mistake. Go to an Ear specialist/ENT and have your ear and neural systems checked ...
Meniere's disease	10/5/2009	Harriet B Jacobster, Au.D.
Q: Jacobster, I have been diagnosed with Meniere's disease recently and have had symptoms for the last ... A: You need to return to your ENT and discuss these issues with him. You may need to have your ...
Fluid in middle ear - decongestants/antihistamines, or no?	10/4/2009	Harriet B Jacobster, Au.D.
Q: Greetings! After a pretty rough cold, I was left with fluid in my middle ear. Outer ear looks ... A: Sometimes antihistamines/decongestants work by shrinking the membranes in the Eustachian tube and ...
does ear drum perforation = deafness?	9/26/2009	Harriet B Jacobster, Au.D.
Q: My 3yo son has a hole in his right ear drum that is half the size of his ear drum, and another in ... A: Your friend is mistaken. The middle ear, of which the ear drum is part, accounts for approximately ...
Left ear is muffled, ringing sound	9/25/2009	Harriet B Jacobster, Au.D.
Q: Harriet B. Jacobster, Au.D., I have a slight hearing problem that has bothered me and I don't know ... A: Since this is obviously an ongoing problem, you need to discuss this with your physician. Without a ...
Popping bubbles sound, hearing loss, earache, etc.	9/24/2009	Harriet B Jacobster, Au.D.
Q: A very dear friend of mine has unfortunately gotten herself mixed up in a bit of a mess and is in ... A: I really do not know how to answer this question. Your friend obviously needs to consult a ...
ear vibrations with sound	9/23/2009	Harriet B Jacobster, Au.D.
Q: I have had an issue with my right ear for over a week now. I have pain plus a fullness plus when I ... A: It does sound as if you have Eustachian Tube dysfunction; however, instead of a more common closed ...
Intermittent Rythmic Fluttering	9/22/2009	Harriet B Jacobster, Au.D.
Q: I am a 58 year old male. No underlying health conditions and in very good health except for ... A: It sounds as if you may have something called myoclonus. Myoclonus is simply a very fast rhythmic ...
Clicking sound in daughter's ear	9/21/2009	Harriet B Jacobster, Au.D.
Q: My 8 year old daughter recently told me she experiences a clicking sound in her left ear. After ... A: You must have your daughter evaluated by a pediatric (preferably) otoneurologist immediately. A ...
ringing in right ear, sound muffled	9/19/2009	Harriet B Jacobster, Au.D.
Q: About five days ago I woke up and my right ear was plugged up. Muffled sound and a little ringing. ... A: You very possibly made matters worse by trying your home remedies, especially by using a Q-tip. You ...
hearing loss	9/18/2009	Harriet B Jacobster, Au.D.
Q: it happened after I was treated with some medication for some acute illness I don't know the name of ... A: I'm not quite sure what type of help you want. If you are looking for restoring your hearing to ...
Drumming, spasms in inner ear	9/17/2009	Harriet B Jacobster, Au.D.
Q: Is there treatment available for this condition? The drumming results in the opening and closing of ... A: The condition your ENT suspects is myoclonus of the tensor tympani. This is a rapid contraction of ...
ringing, roaring & distortion	9/15/2009	Harriet B Jacobster, Au.D.
Q: At the same time I traveled by plane a couple times. I have since recovered and my right ear seems ... A: Most likely, you've always had this condition but it was only now discovered since your symptoms ...
hearing loss	9/14/2009	Harriet B Jacobster, Au.D.
Q: Dr. Jacobster: I am a 36-year-old female suffering from hearing loss. I have a history of hearing ... A: It sounds as if you may have several different things going on here. The crackling and the post ...
blocked ear	9/14/2009	Harriet B Jacobster, Au.D.
Q: First, I want to say, I have had all of the following before, blocked ear, itchy roof of my mouth, ... A: For complete peace of mind, I suggest you consult an ear-nose-throat specialist who would be better ...
Reverberate/roaring left ear	9/2/2009	Harriet B Jacobster, Au.D.
Q: Three months ago, I had a face lift. After surgery I woke up feeling great. But - I turned on the ... A: Unfortunately, the symptoms you describe are not all that uncommon after a facelift. It is very ...
Hearing loss	9/2/2009	Harriet B Jacobster, Au.D.
Q: I have had hearing problems since the age of 6 (Over 30 years) and have come to live with it. I ... A: It sounds as if you have Eustachian Tube Dysfunction. This can usually be treated by prescription ...
fluttering and ringing in my ears	8/31/2009	Harriet B Jacobster, Au.D.
Q: Jacobson, I'm 53 years old and have had a ringing in my ears for the past 3-4 years that won't go ... A: You need to consult an ENT who should evaluate you for stapedial myoclonus (SM). SM is a rapid ...
eng test in child?	8/31/2009	Harriet B Jacobster, Au.D.
Q: I have a 9 yr. old daughter who has had persistent reading problems. She has been tested by ... A: There is no reason to have an ENG test done on your daughter unless she is experiencing vertigo or ...
Hearing aid question	8/19/2009	Harriet B Jacobster, Au.D.
Q: I have a severe to profound loss and ear canal atresia. An audiologist recommended a BTE aid with an ... A: "BTE" is the generic term for any hearing aid where the body of the aid is "behind the ear." The ...
muscle relaxants for middle ear spasms	8/19/2009	Harriet B Jacobster, Au.D.
Q: About a month ago I started to experiencing vibrations/fluttering in one of my ears. I went to my ... A: Without knowing much more about your history, medications, age, etc., it really is difficult to give ...
Dull to sharp ear pain for 4 months	8/17/2009	Harriet B Jacobster, Au.D.
Q: Three months ago I went to visit a friend who had a cat. I was allergic to the cat and developed ... A: Were you evaluated by an ear specialist? An regular internist does not have the capability of doing ...
hearing loss	8/17/2009	Harriet B Jacobster, Au.D.
Q: I am 29 years old and I suffered from Bell's Palsy about a year and a and half ago. At first, along ... A: After a year and a half, your "hearing" should have returned to normal. It is very possible that ...
perforated ear drum	8/15/2009	Harriet B Jacobster, Au.D.
Q: I have had a perforated ear drum for probably longer than i have know but have known about it for ... A: You need to have your ear examined by an ENT. With a perforated eardrum, there is no protection for ...
Tinnitus question	8/15/2009	Harriet B Jacobster, Au.D.
Q: I am a healthy 50 year old woman who unfortunately, has had a mild tinnitus in one ear for a few ... A: Yes, it is possible to have different types of sounds in your ear at the same time. Tinnitus can be ...
muscle relaxants for middle ear spasms	8/14/2009	Harriet B Jacobster, Au.D.
Q: About a month ago I started to experiencing vibrations/fluttering in one of my ears. I went to my ... A: Your ENT suspects that you have stapedial or palatal myoclonus, a rapid contraction of one of the ...
Ear Pain	8/14/2009	Harriet B Jacobster, Au.D.
Q: Since i was a small child, every time I jump into the water I get a sharp pain in one if not both of ... A: You need to be evaluated by an ear specialist and have a complete middle ear and audiological ...
Tinnitus Louder	8/13/2009	Harriet B Jacobster, Au.D.
Q: I got a cold on the 29th June and it really affected my ears, they were blocked and i couldn't hear ... A: Were you evaluated by an ear specialist? And did you have your hearing evaluated by an audiologist? ...
Ear cracking	8/12/2009	Harriet B Jacobster, Au.D.
Q: I was seeking help with my ears. I have been having problems with my right ear for about 4+ months ... A: It certainly does sound that your problems could be related to a Eustachian tube dysfunction, but ...
Painful ear when swallowing, lump on side of neck	8/12/2009	Harriet B Jacobster, Au.D.
Q: I am due to see an ENT in a few weeks, but I was wondering if I could get some information in the ... A: I would suggest you call your ENT and tell him about the lump you found. It may or may not be a ...

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