Controlled study of EMG activity of the jaw closers and openers during mastication in patients with myasthenia gravis
Mastication was evaluated in patients with bulbar myasthenia gravis and compared with that of patients with ocular myasthenia gravis, patients in remission who previously suffered from bulbar symptoms, and healthy controls. Bulbar myasthenia gravis may impair mastication due to weakness of the masticatory muscles. The aim of the study was to objectively evaluate the influence of myasthenia gravis on mastication. The subjects chewed a piece of breakfast cake and chewed 1 min on a piece of chewing gum. Surface EMG of the masseter muscle, temporalis muscle and jaw opener muscles was recorded. Statistical analysis revealed that bulbar patients produced significantly less EMG activity in the closing phase of a chewing cycle in both experiments. The EMG of the masseter muscle expressed as percentage of the maximum EMG during maximal clenching showed significantly higher values in the bulbar group than in the other groups. This was not found for the temporalis muscle. It was suggested that bulbar patients use a strategy of limited effort to produce a bolus that can be swallowed. The ocular patients and the patients in remission showed no subclinical impairments in muscle function during chewing.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2001 |
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| Erschienen: |
2001 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:109 |
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| Enthalten in: |
European journal of oral sciences - 109(2001), 3 vom: 06. Juni, Seite 160-4 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
van der Bilt, A [VerfasserIn] |
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| Themen: |
Chewing Gum |
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| Anmerkungen: |
Date Completed 20.09.2001 Date Revised 05.11.2019 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM113585977 |
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| 100 | 1 | |a van der Bilt, A |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Controlled study of EMG activity of the jaw closers and openers during mastication in patients with myasthenia gravis |
| 264 | 1 | |c 2001 | |
| 336 | |a Text |b txt |2 rdacontent | ||
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| 500 | |a Date Completed 20.09.2001 | ||
| 500 | |a Date Revised 05.11.2019 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Mastication was evaluated in patients with bulbar myasthenia gravis and compared with that of patients with ocular myasthenia gravis, patients in remission who previously suffered from bulbar symptoms, and healthy controls. Bulbar myasthenia gravis may impair mastication due to weakness of the masticatory muscles. The aim of the study was to objectively evaluate the influence of myasthenia gravis on mastication. The subjects chewed a piece of breakfast cake and chewed 1 min on a piece of chewing gum. Surface EMG of the masseter muscle, temporalis muscle and jaw opener muscles was recorded. Statistical analysis revealed that bulbar patients produced significantly less EMG activity in the closing phase of a chewing cycle in both experiments. The EMG of the masseter muscle expressed as percentage of the maximum EMG during maximal clenching showed significantly higher values in the bulbar group than in the other groups. This was not found for the temporalis muscle. It was suggested that bulbar patients use a strategy of limited effort to produce a bolus that can be swallowed. The ocular patients and the patients in remission showed no subclinical impairments in muscle function during chewing | ||
| 650 | 4 | |a Comparative Study | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Chewing Gum |2 NLM | |
| 700 | 1 | |a Weijnen, F G |e verfasserin |4 aut | |
| 700 | 1 | |a Bosman, F |e verfasserin |4 aut | |
| 700 | 1 | |a van der Glas, H W |e verfasserin |4 aut | |
| 700 | 1 | |a Kuks, J B |e verfasserin |4 aut | |
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