IADR Abstract Archives
Changes in Lingual Movement When Modifying Body Posture
Objectives: To analyze lingual movement in healthy participants during swallowing of saliva for different positions of the body and head
Methods: Six participants, healthy, older than 18 years were evaluated (Scientific Ethics Committee approval n° 001/2017). Lingual movement was recorded during spontaneous swallowing of saliva for one minute (3 repetitions) with 3D Electromagnetic Articulography (3D EMA). Two body positions were evaluated, siting and supine. For both body positions the lingual movement was recorded in three positions of the head, upright, chin down and chin up. Eight sensors were placed in different anatomical points of head and neck and an additional sensor was used to delimit the sagittal profile of the palate. Three of the sensors were placed in the anterior, middle and posterior part of the tongue. The data obtained with 3D EMA (space coordinates, Z superior -inferior axis, X anterior - posterior axis, Y medial – lateral axis) were processed with Matlab.
Results: In Z axis, there was a statistical difference for the displacement of the tongue between the upright position of the head and chin down (p = 0.047) and between sitting and supine body position (p = 0.034).
In X axis there was a statistical difference for tongue displacement between the upright position of the head and chin down (p = 0.057) and between sitting and supine body posture (p = 0.016).
Statistical differences were found among the possible combinations of the head and body positions for the X axis (p = 0.006) and for the Y axis (p = 0.005), with a greater displacement of the tongue sitting with an upright head position.
Conclusions: The displacement of the tongue during swallowing of saliva is significantly affected by posture and its effect is different on each direction of space (X, Y, Z)
Methods: Six participants, healthy, older than 18 years were evaluated (Scientific Ethics Committee approval n° 001/2017). Lingual movement was recorded during spontaneous swallowing of saliva for one minute (3 repetitions) with 3D Electromagnetic Articulography (3D EMA). Two body positions were evaluated, siting and supine. For both body positions the lingual movement was recorded in three positions of the head, upright, chin down and chin up. Eight sensors were placed in different anatomical points of head and neck and an additional sensor was used to delimit the sagittal profile of the palate. Three of the sensors were placed in the anterior, middle and posterior part of the tongue. The data obtained with 3D EMA (space coordinates, Z superior -inferior axis, X anterior - posterior axis, Y medial – lateral axis) were processed with Matlab.
Results: In Z axis, there was a statistical difference for the displacement of the tongue between the upright position of the head and chin down (p = 0.047) and between sitting and supine body position (p = 0.034).
In X axis there was a statistical difference for tongue displacement between the upright position of the head and chin down (p = 0.057) and between sitting and supine body posture (p = 0.016).
Statistical differences were found among the possible combinations of the head and body positions for the X axis (p = 0.006) and for the Y axis (p = 0.005), with a greater displacement of the tongue sitting with an upright head position.
Conclusions: The displacement of the tongue during swallowing of saliva is significantly affected by posture and its effect is different on each direction of space (X, Y, Z)