This was inadvertently entered in the system and is not a clinical trial.

Quantitative Genioglossal muscle strength in Obstructive Sleep Apnea (OSAS) defined in the clinical spectrum of subjects with Snoring Disturbance, Oral Appliance Therapy Responsive, and CPAP Responsive

To describe by statistical analysis the normal distribution domain of genioglossus muscle strength in each of the four clinical stages of Sleep Apnea; and, by regression analysis, to explore the possibility of an inverse relationship between decreasing genioglossus strength and progression of the clinical stages of OSAS.

1.3. To test the hypothesis that a "subpopulation of subject" exists within the clinical spectrum of OSAS, in whom decreasing strength of the genioglossus muscle may represent a common element in spite of differing possible pathophysiologic pathways leading to Obstructive Sleep Apnea in man. 1.4. The major hypothesis of this proposal is thus that "Genioglossal Strength is inversely correlated with Obstructive Sleep Apnea Pathology."

Inclusion Criteria:

• Age 20-40 years inclusive BMI 18-25 Non-smoking history and no current use for a minimum of 6 months No smokeless tobacco products (including e-cigarettes) for a minimum of 6 months No sleep snoring reported by subject and by bedroom "companion" Self-described as active/athletic (i.e. regular hikes, walks, jogging, running, active Sports, such as volleyball, soccer, etc.) Self-described as healthy, with no known disease or recent illness Self-completed Epworth Sleepiness Scale of <6 (Johns, MW, A new method for Measuring daytime sleepiness: the Epworth Sleepiness Scale; SLEEP 14:450-5, 1991). Physical Examination Mallampati Score of Class 1 (Nuckton, TJ, et al: Physical

Examination: Mallampati Score as an Independent Predictor of OSAS; SLEEP 29:

903-908, 2006).

Exclusion Criteria:

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This initial pilot investigation will screen up to 70 individuals to obtain the necessary enrollment of 22 subjects per group from Stage Three: CPAP Referral OSAS; and paired normal control subjects