journal article
Jun 26, 2013
Increased sternocleidomastoid, but not trapezius, muscle activity in response to increased chewing load
Abstract
Previous findings, during chewing, that boluses of larger size and harder texture result in larger amplitudes of both mandibular and head–neck movements suggest a relationship between increased chewing load and incremental recruitment of jaw and neck muscles. The present report evaluated jaw (masseter and digastric) and neck [sternocleidomastoid (SCM) and trapezius] muscle activity during the chewing of test foods of different sizes and textures by 10 healthy subjects. Muscle activity was recorded by surface electromyography and simultaneous mandibular and head movements were recorded using an optoelectronic technique. Each subject performed continuous jaw‐opening/jaw‐closing movements whilst chewing small and large boluses of chewing gum and rubber silicone (Optosil). For jaw opening/jaw closing without a bolus, SCM activity was recorded for jaw opening concomitantly with digastric activity. During chewing, SCM activity was recorded for jaw closing concomitantly with masseter activity. Trapezius activity was present in some, but not all, cycles. For the masseter and SCM muscles, higher activity was seen with larger test foods, suggesting increased demand and recruitment of these muscles in response to an increased chewing load. This result reinforces the previous notion of a close functional connection between the jaw and the neck motor systems in jaw actions and has scientific and clinical significance for studying jaw function and dysfunction.
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References
37
[13]
Grönqvist J "Impaired jaw function and eating difficulties in whiplash‐associated disorders" Swed Dent J (2008)
[20]
Shimazaki K "Functional relationships between the masseter and sternocleidomastoid muscle activities during gum chewing" Angle Orthod (2006)
[21]
[23]
[28]
Zafar H "Impaired positioning of the gape in whiplash‐associated disorders" Swed Dent J (2006)
[32]
Metrics
41
Citations
37
References
Details
- Published
- Jun 26, 2013
- Vol/Issue
- 121(5)
- Pages
- 443-449
- License
- View
Authors
Cite This Article
Birgitta Häggman‐Henrikson, Erik Nordh, Per‐Olof Eriksson (2013). Increased sternocleidomastoid, but not trapezius, muscle activity in response to increased chewing load. European Journal of Oral Sciences, 121(5), 443-449. https://doi.org/10.1111/eos.12066
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