I had a question. For unilateral vestib lesions, the VOR gain would be less on ipsi-lesional side. I understood that but Why would gain on that side decrease with increasing velocity. Will not the inhibitory side get clipped, and if it gets clipped how would it interfere when we stimulate the ipsi-lesional side?? So should not the gain be static even with increasing velocity
Hello Raghav. Thank you for your interest. We have posed your question to Michelle Petrak Ph.D, Clinical Director of Audiology at Interacoustics. This is her reply: "Referring to the slide at 13:30, it is clear that the inhibitory neural firings saturate for high head velocities. Once the inhibitory responses saturate, they do not increase no matter how much the head velocity increases. As a result, eye velocities do not increase and VOR gains decrease with increasing head velocities beyond that point. This happens in normal individuals and patients with canal dysfunction but it is more noticeable in patients because the saturation occurs at lower head velocities."
I had a question. For unilateral vestib lesions, the VOR gain would be less on ipsi-lesional side. I understood that but Why would gain on that side decrease with increasing velocity. Will not the inhibitory side get clipped, and if it gets clipped how would it interfere when we stimulate the ipsi-lesional side?? So should not the gain be static even with increasing velocity
Hello Raghav. Thank you for your interest. We have posed your question to Michelle Petrak Ph.D, Clinical Director of Audiology at Interacoustics. This is her reply:
"Referring to the slide at 13:30, it is clear that the inhibitory neural firings saturate for high head velocities. Once the inhibitory responses saturate, they do not increase no matter how much the head velocity increases. As a result, eye velocities do not increase and VOR gains decrease with increasing head velocities beyond that point. This happens in normal individuals and patients with canal dysfunction but it is more noticeable in patients because the saturation occurs at lower head velocities."
Martinez Carol Anderson Ronald Jackson Carol
Tomorrow I am taking that test in the hospital and I am so nervous
Heya, can you let me know how it goes please as I have one of these coming up at somepoint. Good luck :)
Cost?