Effortful pitch glide: a potential new exercise evaluated by dynamic MRI

Area of Science:

• Biomechanics
• Swallowing physiology
• Dynamic MRI

Background:

• The effortful pitch glide (EPG) is a novel maneuver combining pitch glide and pharyngeal squeeze.
• It targets laryngeal and pharyngeal muscles crucial for swallowing.
• Understanding its biomechanical distinctiveness from swallowing is important for therapeutic applications.

Purpose of the Study:

• To compare the biomechanics of the effortful pitch glide (EPG) with normal swallowing using dynamic MRI.
• To test the hypothesis that EPG elicits greater structural excursions than swallowing.

Main Methods:

• Dynamic 2-planar (coronal and sagittal) MRI was used to capture swallows and EPGs in 11 healthy young adults.
• Kinematic analyses quantified excursions of hyoid bone and laryngeal structures.
• EPG was taught and verified prior to MRI acquisition.

Main Results:

• No significant biomechanical differences were found between EPG and swallowing, except for superior hyoid excursion, which was greater during swallowing.
• These comparable biomechanics suggest EPG's potential as a non-swallowing exercise.

Conclusions:

• The effortful pitch glide (EPG) demonstrates biomechanical similarity to swallowing.
• EPG may serve as an effective exercise for targeting muscles involved in laryngeal elevation and pharyngeal shortening during swallowing.
• This supports its potential use in dysphagia rehabilitation.