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Timothy C. Hain, MD Page last modified: November 30, 2011

Current Research

There are many clinical research projects currently being undertaken by Dr. Hain with many collaborators. Here is a selection of ones that are ongoing.

Sled project:

Linear Sled
Linear Sled at NUPT

With the support of NIH, we built a bobsled like device. It is very powerful and uses a magnetic drive to accelerate itself almost instantaneously at 2 gravities. A study, in collaboration with Emily Keshner, Ph.D, is presently underway in which we are measuring head stability in normal subjects, patients with bilateral vestibular loss, and patients with cerebellar disorders.

VEMP projects:

We are presently pursuing a large number of projects using the VEMP (vestibular evoked myogenic potential) protocol. This is a simple method of eliciting vestibulospinal reflexes


Equipment used to record a VEMP, a Bio-Logic Navigator Pro.

Recent projects have included assessment bone VEMP's, as well as arm and leg VEMPs. This methodology provides a very straightforward method of determining the degree to which the inner ear controls balance reactions in the body.


Benign paroxysmal positional vertigo (BPPV) is the single most common cause of dizziness. It can be effectively treated by physical therapy.



Pedometer used to count steps in patients with BPPV.

In a recent student synthesis project, we looked to see whether BPPV affects mobility, by assessing steps/day before and after successful treatment of BPPV.

This section has annotations and key illustrations from selected papers published since 1984.


Gaze-holding (see also: rebound nystagmus)



Vestibular and oculomotor testing

Head-shaking Nystagmus (see also here)


Clinical situations

Perilymph Fistula

Head and body motor control

Rehabilitation of Vestibular Problems

Voice motor control (see also f0-control)

Copyright August 3, 2016 , Timothy C. Hain, M.D. All rights reserved. Last saved on August 3, 2016