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

Tae-Hoon Kim; Da-Hye Kim

doi:10.5115/acb.19.191

Variations in Stroke Patients’ Muscle Activity during Head Rotation in Non-Paretic-Side Weight Bearing

The Journal of Korean Physical Therapy ◽

10.18857/jkpt.2015.27.3.159 ◽

2015 ◽

Vol 27 (3) ◽

pp. 159-163 ◽

Cited By ~ 2

Author(s):

Kwan-Sub Lee ◽

Han-Seong Choe ◽

Byung-Joo Lee

Keyword(s):

Muscle Activity ◽

Weight Bearing ◽

Head Rotation ◽

Stroke Patients ◽

Paretic Side

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Head Rotation and Muscle Activity When Conducting Document Editing Tasks with a Head-Mounted Display

Proceedings of the Human Factors and Ergonomics Society Annual Meeting ◽

10.1177/1541931218621219 ◽

2018 ◽

Vol 62 (1) ◽

pp. 952-955

Author(s):

Eunjee Kim ◽

Gwanseob Shin

Keyword(s):

Muscle Activity ◽

Head Rotation ◽

Myoelectric Activity ◽

Neck Muscle ◽

Neck Flexion ◽

Head Mounted Display ◽

Shoulder Muscles ◽

Flexion Moment ◽

Subjective Discomfort ◽

Healthy Participants

Potential ergonomic issues associated with the use of a head mounted display (HMD) for office productivity applications have not yet been quantitatively evaluated. A laboratory experiment was conducted to quantitatively evaluate physical stresses and the productivity of the use of HMD. Twenty healthy participants conducted a document editing task for 60 minutes once with an external display and once with a HMD. Head rotation in sagittal and transverse planes, myoelectric activity of neck and shoulder muscles, subjective discomfort ratings and productivity were collected periodically during the task. Results found significantly (p<0.05) greater head rotation movements on both planes, neck muscle activities, and discomfort ratings and decreased productivity when conducting the task with the HMD as compared when using the external display. Difficulty in reading texts due to insufficient resolution of the HMD screen, additional load and neck flexion moment from the weight of the device were responsible for the greater physical stresses associated with the use of HMD.

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Special Considerations for Evaluation and Treatment of Spanish-Speaking Patients with Cleft Palate

Perspectives of the ASHA Special Interest Groups ◽

10.1044/persp1.sig5.41 ◽

2016 ◽

Vol 1 (5) ◽

pp. 41-49

Author(s):

Ellen Moore

Keyword(s):

Cleft Palate ◽

The United States ◽

Culturally Competent ◽

Speech Language Pathology ◽

Spanish Speaking ◽

Appropriate Treatment ◽

Oral Pressure ◽

Language Pathology ◽

History Of ◽

Spanish Speaking Population

As the Spanish-speaking population in the United States continues to grow, there is increasing need for culturally competent and linguistically appropriate treatment across the field of speech-language pathology. This paper reviews information relevant to the evaluation and treatment of Spanish-speaking and Spanish-English bilingual children with a history of cleft palate. The phonetics and phonology of Spanish are reviewed and contrasted with English, with a focus on oral pressure consonants. Cultural factors and bilingualism are discussed briefly. Finally, practical strategies for evaluation and treatment are presented. Information is presented for monolingual and bilingual speech-language pathologists, both in the community and on cleft palate teams.

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The Importance of Oral Pressure

Perspectives on Speech Science and Orofacial Disorders ◽

10.1044/ssod9.1.16 ◽

1999 ◽

Vol 9 (1) ◽

pp. 16-16

Author(s):

John E Riski

Keyword(s):

Oral Pressure

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Myoelectric Activity Differences in Three Learning Sessions

Journal of Psychophysiology ◽

10.1027//0269-8803.16.2.92 ◽

2002 ◽

Vol 16 (2) ◽

pp. 92-96

Author(s):

Tiina Ritvanen ◽

Reijo Koskelo ◽

Osmo H„nninen

Keyword(s):

High School Students ◽

Muscle Activity ◽

Muscle Tension ◽

Emg Activity ◽

Traditional Learning ◽

Myoelectric Activity ◽

School Students ◽

Language Laboratory ◽

Upper Trapezius ◽

Muscle Groups

Abstract This study follows muscle activity in three different learning sessions (computer, language laboratory, and normal classroom) while students were studying foreign languages. Myoelectric activity was measured in 21 high school students (10 girls, 11 boys, age range 17-20 years) by surface electromyography (sEMG) from the upper trapezius and frontalis muscles during three 45-min sessions. Root mean square (RMS) average from both investigated muscles was calculated. The EMG activity was highest in both muscle groups in the computer-aided session and lowest in the language laboratory. The girls had higher EMG activity in both investigated muscle groups in all three learning situations. The measured blood pressure was highest at the beginning of the sessions, decreased within 10 min, but increased again toward the end of the sessions. Our results indicate that the use of a computer as a teaching-aid evokes more constant muscle activity than the traditional learning situations. Since muscle tension can have adverse health consequences, more research is needed to determine optimal classroom conditions, especially when technical aids are used in teaching.

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