Tongue Motor Recruitment During Exercise



Status:Completed
Conditions:Healthy Studies
Therapuetic Areas:Other
Healthy:No
Age Range:18 - 90
Updated:1/6/2017
Start Date:May 2016
End Date:December 2016

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Genioglossus Motor Recruitment During Swallowing and Expiratory Loading Exercises

The prevalence of dysphagia may be as high as 22% in individuals over 50 years of age. There
are few therapeutic options offered to these individuals. One more recent therapeutic option
is Expiratory Muscle Strength Training (EMST), which has been used successfully to maintain
or increase expiratory force generating pressures, cough function, and swallowing in a
number of disease populations. Recently, the investigators have noted improvements in oral
transit time during swallowing in individuals with Amyotrophic Lateral Sclerosis (ALS) that
could potentially be attributed to improved base of tongue functioning and muscle
activation.

There has been one study that demonstrated that breathing training resulted in increased and
prolonged submental (under the chin) muscle activation as evidenced by surface
electromyography. However, no studies have investigated the activation of the tongue muscles
during various swallowing and breathing exercises. A small needle electrode (fine wire EMG)
is standard of care in diagnosing muscular diseases because it can determine amount of
muscle recruitment for muscles throughout the body. This aim of this research study is to
examine the effects of breathing exercises and swallowing exercises on tongue muscle
activity in healthy adults.

This study will measure tongue muscle activation using fine wire EMG placed into the tongue
muscle (underneath the chin) during swallowing and breathing exercises. A neurologist
trained in EMG will perform all procedures to ensure best placement and minimize discomfort
of the participant. While the needle is in place, the participant will complete a series of
swallowing tasks and breathing exercises using a small, handheld training device. All
swallowing and breathing tasks will be viewed under x-ray in order to see the movement and
timing of the tongue and swallowing muscles during each task. Participation in the study
will take one, one-hour visit to the Shands Dental Tower lab spaces where all procedures
will be completed.

Inclusion Criteria:

- No known major disease, disorder or medical conditions

Exclusion Criteria:

- Currently on anticoagulant therapy

- Has a bleeding/anticoagulant disorder or disease
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