Electromyography of the masticatory muscles during chewing in different head and neck postures - A pilot study

Gadotti, Inaê Caroline; Hicks, Kimani; Koscs, Eric; Lynn, Bryanna; Estrázulas, Jansen Atier; Civitella, Fernanda

doi:10.1016/j.jobcr.2020.02.002

Cited by 21 publications

(17 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, the denture use group had lower neck muscle strength than the non-denture group. These findings support the previously described association between denture use and natural head position in older adults [ 32 ].…”

Section: Discussionsupporting

confidence: 92%

Head Posture and Postural Balance in Community-Dwelling Older Adults Who Use Dentures

Bae

Park

2020

Medicina

View full text Add to dashboard Cite

Background and objectives: Tooth loss and consequent denture use and impaired posture and postural balance are more prevalent in older adults than in the young ones. The aim of this cross-sectional study was to identify the association between denture use, head posture, postural balance, and neck muscle strength (NMS). Materials and methods: We included 107 participants (56 in the non-denture use group and 51 in the denture use group) and measured their NMS, forward head posture, and postural balance. Forward head posture was measured using the craniocervical angle (CRA). Postural balance was assessed using a timed up-and-go test (TUG) and postural sway. An independent t-test was used to analyze the differences between the groups; Pearson correlation analysis was used to analyze the correlation of period of denture use, head posture, and postural balance. Results: We found that the denture use group had lower NMS, smaller CRA, longer TUG, and longer postural sway length than the non-denture use group. Duration of denture use was significantly correlated with TUG. Conclusions: Our findings reveal that denture use does not help with NMS, forward head maintain NMS, head posture, and postural balance in older adults.

show abstract

Section: Discussionsupporting

confidence: 92%

Head Posture and Postural Balance in Community-Dwelling Older Adults Who Use Dentures

Bae

Park

2020

Medicina

View full text Add to dashboard Cite

show abstract

“…The subjects sat against the wall, keeping the spine upright, using the wall as a vertical reference, with both hands placed on top of their legs and feet on the ground. The subjects were asked to adjust their heads to the neutral position, with the mandible naturally relaxed (21). NHP is readily determined by a lateral photograph to visually assess the alignment of tragus of the ear related to the midline of trunk (21).…”

Section: Head Positionsmentioning

confidence: 99%

Head and neck posture influences masticatory muscle electromyographic amplitude in healthy subjects and patients with temporomandibular disorder: a preliminary study

Zhang

et al. 2021

Ann Palliat Med

View full text Add to dashboard Cite

Background: Despite the association of masticatory function with head posture and mandible movement, the impact of head posture on masseter muscle electrical activity remains unclear. This study aimed to investigate the electrical activity of the anterior temporal, masseter, superior trapezius, and sternocleidomastoid muscles in temporomandibular disorder (TMD) patients in three different head positions and compare the findings with those for healthy subjects.Methods: The study included 16 TMD patients and 17 healthy subjects. Surface electromyography (sEMG) was used to assess the bilateral anterior temporalis, masseter, superior trapezius, and sternocleidomastoid muscle activities. The maximal voluntary contraction (MVC) and root mean square (RMS) sequence of each muscle were measured in three head positions. Mixed analysis of variance was used to evaluate the effects of head posture on muscle electrical activity in each group. Results:The group differences for the bilateral masseter muscles were significant in the relaxation position, neutral head position (NHP), and relaxation position with tooth contact (P<0.05). In both groups, the basal RMSs of the bilateral anterior temporalis muscle in the relaxation position with tooth contact was significantly higher than that in the NHP (P<0.05). In both groups, the basal RMSs of the bilateral masseter muscles in the relaxation position with tooth contact was higher than that in the relaxation position and NHP, with significant differences (P<0.05).Conclusions: During the management of TMD patients, physical therapists should focus on patient education regarding maintenance of a relaxed position and establish appropriate rehabilitation programs to reduce muscle activity.

show abstract

“…Moreover, only two studies have F I G U R E 2 Kinematic results (means and standard errors) of temporomandibular joint (TMJ), including ranges of maximum mouth opening (MMO), protrusion, lateral movement and condylar path length (CPL) in the healthy controls (C) and patients with nonspecific chronic neck pain (NP), *Significant group effect in CPL (p = .02) investigated the activity of masticatory muscles in individuals with neck pain or with the forward head posture. 48,49 They found that compared with healthy controls, individuals with neck pain or the forward head posture showed normal AT activation during maximum clenching. 48,49 However, by using high-density surface EMG, patients with moderate neck disability demonstrated increased activation of MA during submaximal clenching (30%-70% of maximum clenching).…”

Section: Discussionmentioning

confidence: 99%

Alterations in kinematics of temporomandibular joint associated with chronic neck pain

Siu

Shih

Lee

et al. 2022

J of Oral Rehabilitation

View full text Add to dashboard Cite

Background Temporomandibular disorder (TMD) is an umbrella term for pain and dysfunction of the temporomandibular joint (TMJ) and its associated structures. Patients with TMD show changes in TMJ kinematics and masticatory muscle activation. TMD is commonly comorbid with non‐specific chronic neck pain (NCNP), which may be one of the risk factors for TMD. Objectives This study aimed to investigate whether patients with NCNP have altered TMJ kinematics and masticatory muscle activity. Methods This was a cross‐sectional exploratory study including 19 healthy participants and 20 patients with NCNP but without TMD symptoms. TMJ kinematics was measured during mouth opening and closing, jaw protrusion and jaw lateral deviation. Surface electromyography was used to record the muscle activity of the anterior temporalis, masseter, sternocleidomastoid and upper trapezius while clenching. Furthermore, cervical posture, cervical range of motion (ROM) and pressure‐pain threshold of the neck and masticatory muscles were measured. Results Compared with the healthy group, the NCNP group showed significantly reduced upper cervical rotation ROM (p = .041) and increased condylar path length (p = .02), condylar translation (opening p = .034, closing p = .011) and mechanical pain sensitivity of the upper trapezius (p = .018). Increased condylar translation was significantly correlated with reduced upper cervical mobility and poor cervical posture (r = −0.322 to −0.397; p = .012–.046). Conclusion Increased condylar translation and path length in patients with NCNP may indicate poor control of TMJ articular movement, which may result from neck pain or may be a compensation for limited neck mobility. Evaluation of excessive TMJ translation may be considered in patients with NCNP.

show abstract

Electromyography of the masticatory muscles during chewing in different head and neck postures - A pilot study

Cited by 21 publications

References 25 publications

Head Posture and Postural Balance in Community-Dwelling Older Adults Who Use Dentures

Head Posture and Postural Balance in Community-Dwelling Older Adults Who Use Dentures

Head and neck posture influences masticatory muscle electromyographic amplitude in healthy subjects and patients with temporomandibular disorder: a preliminary study

Alterations in kinematics of temporomandibular joint associated with chronic neck pain

Contact Info

Product

Resources

About