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Scientific Papers Session VIII: Tongue and Aerodigestive Physiology

 Friday, March 8 ,2019

3:45-5:15 p.m.

 Moderator:

Jan Vanderwegen, MD


 

Contextualizing Dysphagia Assessments: A Paradigm Shift in Thinking and Assessment

Kim Coutts

The commonplace thinking around dysphagia assessment methodology is that it uses criterion-based measures to create reliability and validity, which is usually conducted using the instrumental measures such as Fibreoptic Endoscopic Evaluation of Swallowing. In a perfect world, this is ideal practice, unfortunately, the majority world (mostly low-middle income countries) is far from perfect. These settings forces SLPs to rely heavily on the arguably more subjective clinical swallow evaluation (CSE). Is this poorer practice? This study aimed to investigate how the CSE could be augmented to address challenges but still be globally accessible.

 

The Effectiveness of an Ecologically Valid Telerehabilitation for Neurogenic Dysphagia Assessment and Primary Management in a Resource Constrained Country

Sona Ayanikalath

Dysphagia management via TR has been delivered under controlled settings in economically advanced countries. The current study aimed to investigate the effectiveness of TR in the assessment and primary management of neurogenic dysphagia in a resource constrained country, which is India.

Sensate Versus Asensate Flap Reconstruction of the Oral Cavity with Objective Measurements of Tongue Strength and Function in a Rat Model

Jared Cullen

Surgical treatment of oral cavity cancer may compromise lingual and/or hypoglossal nerves, resulting in reduced tongue function. The impact of a lingual nerve deficit, which compromises transmission of sensory information from the tongue, on tongue function is not known. Our purpose was to simulate sensate and asensate oral cavity flap reconstructions in a rat model to objectively measure the impact of sensory and/or motor deficits on tongue function.

 

Central Versus Peripheral Contributions to Post Stroke Lingual Weakness in a Rat Model

Miranda Cullins

Lingual weakness after stroke is associated with dysphagia and is often targeted by exercise interventions. Chronic weakness after stroke is attributed to both impaired ability to centrally activate target muscles and reduced force generating capacity within muscles. However, how these factors contribute to lingual weakness after stroke is not known. The middle cerebral artery occlusion (MCAO) rat model of post stroke dysphagia is associated with both chronic lingual weakness and deficits in swallowing function. We used this model to test the hypotheses that both reduced muscle force generating capacity (maximum stimulated force) and reduced ability to activate the muscle (Percent Voluntary Activation) contribute to lingual weakness (maximum voluntary force).

 

Effects of Tongue Exercise Dose on Tongue Force and Bolus Flow Rate in a Rat Model

Brittany Krekeler

The optimal dose of tongue exercise to achieve maximum benefit is not known. Clinical research protocols include a range of dose recommendations, however, many of these procedures are based on studies of limb muscle, which differ in structure and function from muscles of the head and neck. If smaller doses are equally efficacious to larger doses, there could be positive implications for treatment burden reduction, increased adherence, and reduced health care costs.

 

Effects of Superior Laryngeal Nerve Lesion and Airway Protection on Kinematics of Swallowing in an Infant Mammal Model

Andrew Lammers

Detailed sensory feedback is essential to facilitate airway protection during the kinematics, or complex movements, of a swallow. The superior laryngeal nerve (SLN) is the trigger for the swallow, and its sensory field is critical for swallow safety. Because of its role in initiating the swallow, we hypothesize that an SLN injury will alter the timing of events. Thus, we determined the effects of a surgical lesion of the SLN on swallow kinematics using an animal model, which permitted extensive VFSS data collection.

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