Anat Cell Biol.  2019 Dec;52(4):378-384. 10.5115/acb.19.191.

The effects of head rotation and tilt on oral pressure and muscle activity

Affiliations
  • 1Department of Occupational Therapy, Division of Health Science, Dongseo University, Busan, Korea.
  • 2Department of Dental Hygiene, Division of Health Sciences, Dongseo University, Busan, Korea. dahye1124@dongseo.ac.kr

Abstract

We present basic data on head positions that can serve as compensatory interventions for patients with weak tongue and buccinator muscles. We studied 30 Korean adults (15 males, 15 females; mean age, 23 years; range, 20-30 years). A TPS-100 instrument was used to measure tongue and cheek pressures and suprahyoid and buccinator muscle activities at various head rotations and tilts, as independent variables. The data were subjected to one-way analysis of variance and post-hoc (linear contrast) testing. Tongue elevation pressures differed significantly when the head was flexed or extended compared to the neutral position (P<0.01). Suprahyoid muscle activity varied significantly when the head was rotated left or right compared to neutral, or tilted with the tongue elevated (P<0.01). Cheek pressure varied significantly when the head was rotated left or right compared to neutral, or tilted (P<0.01). Both tongue and cheek pressures increased significantly when the head was extended or rotated contralaterally compared to the neutral position. Suprahyoid muscle activity increased when the head was flexed or extended, or contralaterally or ipsilaterally rotated compared to the neutral position. Therefore, we suggest that head rotation or tilting could be used to vary oral pressure and muscle activity.

Keyword

Head position; Suprahyoid muscles; Buccinator; Oral pressure; Muscle activity

MeSH Terms

Adult
Cheek
Female
Head*
Humans
Male
Muscles
Tongue

Figure

  • Fig. 1 Measurement of oral pressure and muscle activity using TPS-100 and 2EM 4D-MT devices. (A) The air bulb of TPS-100 is located in the oral cavity. The electrodes of 2EM 4D-MT are attached to the suprahyoid and buccinator muscles. (B) The TPS-100 device is consist of an air bulb, a tube, a sensor, and a pressure-measuring device. The patients provided written informed consent for the publication and the use of their images.

  • Fig. 2 Oral pressure according to head position with tongue elevation (**P<0.01). LR, left rotation; RR, right rotation; NH, neutral head; HF, head flexion; HE, head extension.

  • Fig. 3 Oral pressure according to head position with tongue elevation (*P<0.05, **P<0.01). LR, left rotation; RR, right rotation; NH, neutral head; HF, head flexion; HE, head extension.

  • Fig. 4 Muscle activity of the buccinator according to head position with tongue elevation. %RVC, percentage reference voluntary contraction; LR, left rotation; RR, right rotation; NH, neutral head; HF, head flexion; HE, head extension.

  • Fig. 5 Muscle activity of the buccinator according to head position with cheek constriction. %RVC, percentage reference voluntary contraction; LR, left rotation; RR, right rotation; NH, neutral head; HF, head flexion; HE, head extension.

  • Fig. 6 Muscle activity of the suprahyoid according to head position with tongue elevation (**P<0.01). %RVC, percentage reference voluntary contraction; LR, left rotation; RR, right rotation; NH, neutral head; HF, head flexion; HE, head extension.

  • Fig. 7 Muscle activity of the suprahyoid according to head position with cheek constriction. %RVC, percentage reference voluntary contraction; LR, left rotation; RR, right rotation; NH, neutral head; HF, head flexion; HE, head extension.


Cited by  1 articles

Association between masticatory muscle activity and oral conditions in young female college students
Cha-Young Pyo, Tae-Hoon Kim, Da-Hye Kim
Anat Cell Biol. 2021;54(4):479-488.    doi: 10.5115/acb.21.107.


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