2P2-O08 Estimation of Muscle Tension using Muscle Activity Database and Statistical Motion Recognition(Sense, Motion and Measurement)

2011 ◽  
Vol 2011 (0) ◽  
pp. _2P2-O08_1-_2P2-O08_4
Author(s):  
Yusuke NAKAMURA ◽  
Wataru TAKANO ◽  
Yoshihiko NAKAMURA
Keyword(s):  
Muscle Activity ◽  
Muscle Tension ◽  
Motion Recognition

Myoelectric Activity Differences in Three Learning Sessions

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.

Elevation of histidine decarboxylase activity in skeletal muscles and stomach in mice by stress and exercise

2000 ◽  
Vol 279 (6) ◽  
pp. R2042-R2047 ◽  
Author(s):  
Kentaro Ayada ◽  
Makoto Watanabe ◽  
Yasuo Endo
Keyword(s):  
Muscle Activity ◽  
Skeletal Muscles ◽  
Histidine Decarboxylase ◽  
Muscle Tension ◽  
The Other ◽  
Decarboxylase Activity ◽  
Gastric Hemorrhage ◽  
Different Types ◽  
Cold Restraint ◽  
Histidine Decarboxylase Activity

The effects of different types of stress (water bathing, cold, restraint, and prolonged walking) on histidine decarboxylase (HDC) activity in masseter, quadriceps femoris, and pectoralis superficial muscles, and in the stomach were examined in mice. All of these stresses elevated gastric HDC activity. Although water bathing, in which muscle activity was slight, was sufficiently stressful to produce gastric hemorrhage and to increase gastric HDC activity, it produced no detectable elevation of HDC activity in any of the muscles examined. The other stresses all elevated HDC activity in all three muscles. We devised two methods of restraint, one accompanied by mastication and the other not. The former elevated HDC activity in the masseter muscle, but the latter did not. These results suggest that 1) HDC activity in the stomach is an index of responses to stress, 2) the elevation of HDC activity in skeletal muscles during stress is induced partly or wholly by muscle activity and/or muscle tension, and 3) stress itself does not always induce an elevation of HDC activity in skeletal muscles.

EMG in Common Migraine: Changes in Absolute and Proportional EMG Levels During Real-Life Stress

Cephalalgia ◽  
1988 ◽  
Vol 8 (3) ◽  
pp. 163-174 ◽  
Author(s):  
Plona Goudswaard ◽  
Jan Passchier ◽  
Jacobus F Orlebeke
Keyword(s):  
Muscle Activity ◽  
Life Stress ◽  
Muscle Tension ◽  
Real Life ◽  
Emg Activity ◽  
Experimental Stress ◽  
Facial Muscle ◽  
Long Duration ◽  
The Absolute ◽  
Muscle Responses

The absolute and proportional EMG levels of the frontal, temporal, and corrugator muscles of 37 migraine patients and 37 matched controls were recorded during three experimental sessions: adaptation and real-life and experimental stress, both of long duration. Migraine patients did not show significantly different absolute EMG levels but had higher proportional EMG levels of the corrugator muscle than controls in each session. Migraine patients did not have different facial muscle responses to stress, and the two experimental groups reacted similarly to real-life and experimental stress. No relation was found between muscle activity and reported headache within 24 h after real-life stress. Increased EMG activity due to stress does not seem to be a significant cause of headache in common migraine as defined in this study, but rather a response to pain. Migraine patients with headache during stress showed lower muscle tension than patients without headache.

Exploring the Clinical Utility of Relative Fundamental Frequency as an Objective Measure of Vocal Hyperfunction

2016 ◽  
Vol 59 (5) ◽  
pp. 1002-1017 ◽  
Author(s):  
Nelson Roy ◽  
Rebecca A. Fetrow ◽  
Ray M. Merrill ◽  
Christopher Dromey
Keyword(s):  
Fundamental Frequency ◽  
Muscle Activity ◽  
Clinical Utility ◽  
Muscle Tension ◽  
Objective Measure ◽  
Vowel Context ◽  
Muscle Tension Dysphonia ◽  
Vocal Hyperfunction ◽  
Before And After ◽  
Relative Fundamental Frequency

Purpose Vocal hyperfunction, related to abnormal laryngeal muscle activity, is considered the proximal cause of primary muscle tension dysphonia (pMTD). Relative fundamental frequency (RFF) has been proposed as an objective acoustic marker of vocal hyperfunction. This study examined (a) the ability of RFF to track changes in vocal hyperfunction after treatment for pMTD and (b) the influence of dysphonia severity, among other factors, on the feasibility of RFF computation. Method RFF calculations and dysphonia severity ratings were derived from pre- and posttreatment recordings from 111 women with pMTD and 20 healthy controls. Three vowel–voiceless consonant–vowel stimuli were analyzed. Results RFF onset slope consistently varied as a function of group (pMTD vs. controls) and time (pretherapy vs. posttherapy). Significant correlations between RFF onset cycle 1 and dysphonia severity were observed. However, in many samples, RFF could not be computed, and adjusted odds ratios revealed that these unanalyzable data were linked to dysphonia severity, phonetic (vowel–voiceless consonant–vowel) context, and group (pMTD vs. control). Conclusions RFF onset appears to be sensitive to the presence and degree of suspected vocal hyperfunction before and after therapy. The large number of unanalyzable samples (related especially to dysphonia severity in the pMTD group) represents an important limitation.

Vocational muscle activity and perceived muscle tension in young adults

2012 ◽  
Vol 14 (3) ◽  
pp. 107-114 ◽  
Author(s):  
Morten Wærsted ◽  
Liv Berit Hæg ◽  
Therese N. Hanvold ◽  
Gert-Åke Hansson ◽  
Kaj Bo Veiersted
Keyword(s):  
Young Adults ◽  
Muscle Activity ◽  
Muscle Tension

scholarly journals Hormonal and Neuromuscular Responses to Breastfeeding: A Pilot Study

2017 ◽  
Vol 19 (4) ◽  
pp. 399-408 ◽  
Author(s):  
Madalynn Neu ◽  
Zhaoxing Pan ◽  
Ashley Haight ◽  
Karen Fehringer ◽  
Katrina Maluf
Keyword(s):  
Hpa Axis ◽  
Muscle Activity ◽  
Longitudinal Research ◽  
Muscle Tension ◽  
Primary Objective ◽  
Child Assessment ◽  
Data Logger ◽  
Interactive Behavior ◽  
Neuromuscular Responses ◽  
Interactive Behaviors

Objectives: Difficult breastfeeding in the first weeks after birth may result in muscle tension in infants and activation of the maternal hypothalamic–pituitary–adrenal (HPA) axis and sympathetic nervous system (SNS). Our primary objective was to examine the feasibility of collecting neuroendocrine markers of maternal HPA axis and SNS activation (salivary cortisol and α-amylase [sAA]) and electromyographic (EMG) markers of infant distress during feeding in the first 2 weeks after birth. We also examined the relationships of these indices to each other and to mother–infant interactive behaviors during feeding. Methods: We recruited mothers in the postpartum unit of a teaching hospital and observed a feeding in the dyad’s home. Cortisol and sAA were sampled before feeding, 10 min into feeding, at feeding end, and 20 min after feeding. Infant muscle activity was recorded continuously with an EMG data logger. We used the Nursing Child Assessment Feeding Scale to measure mother–infant interaction. Results: The 20 mothers reported no disruption to breastfeeding and no change in infant behavior due to collection measures. Mean cortisol levels decreased significantly; there was no significant change in sAA levels. Relationships were found between interactive behavior and trends in neuroendocrine biomarkers. Longer bursts of infant muscle activity were associated with higher levels of maternal cortisol during feeding but not mother–infant interactive behaviors. Conclusions: Maternal salivary biomarkers and their association with feeding behaviors can be a useful tool for clinical longitudinal research beginning soon after birth. Infant EMG data may be useful for assessing maternal arousal.

scholarly journals Clinical and Electromyographic Assessment of Swallowing in Individuals with Functional Dysphonia Associated with Dysphagia Due to Muscle Tension or Atypical Swallowing

2021 ◽  
Vol 11 (2) ◽  
pp. 167-178
Author(s):  
Paulina Krasnodębska ◽  
Agnieszka Jarzyńska-Bućko ◽  
Agata Szkiełkowska ◽  
Jędrzej Bartosik
Keyword(s):  
Muscle Activity ◽  
Surface Electromyography ◽  
Assessment Tool ◽  
Muscle Tension ◽  
Maximum Amplitude ◽  
Reflux Symptom Index ◽  
Symptom Index ◽  
Submental Muscles ◽  
Swallowing Difficulties ◽  
Almost All

Introduction: Over the past few years, attention has been paid to the coexistence of dysphonia with dysphagia, in the context of functional disorders. The aim of this work was to objectify logopaedic examination of dysphonic patients with coexisting swallowing difficulties by surface electromyography. Methods: The material of the work included 58 patients with muscle tension dysphonia (MTD). Each patient underwent otolaryngologic, phoniatric and logopaedic examination. We collected information about medical history and asked patients to fill out Reflux Symptom Index (RSI), Eating Assessment Tool (EAT-10), Dysphagia Handicap Index (DHI) and Swallowing Disorder Scale (SDS). The algorithm of dysphagia diagnostics in our clinic assumes parallel surface electromyography (SEMG) during Functional Endoscopic Evaluation of Swallowing. Results: In comparison to patients suffering from atypical swallowing, patients with muscle tension dysphagia (MTDg) obtained higher values from almost all questionnaires. Logopaedic evaluation revealed abnormalities in the structure and efficiency of the articulatory organs and in the assessment of primary functions. Patients with more abnormalities in logopaedic examination had significantly higher infrahyoid muscle activity during swallowing observed in EMG. Patients with non-normative swallowing pattern had significantly greater asymmetry of the average and maximum amplitude of masseters, as well as submental muscles. Patients with higher percent of muscles asymmetry gained higher scores in questionnaires. Conclusions: Surface electromyography objectifies logopaedic examination of patients with swallowing difficulties. The results of this work showed that, apart from longer swallows, patients with MTDg differ from patients with non-normative swallowing patterns in the muscle activity measured by SEMG, abnormalities in logopaedic evaluation and the severity of complaints reported by patients.

Monitoring of Fes-Induced Muscle Activity by Continuous Emg-Recording

1995 ◽  
Vol 18 (6) ◽  
pp. 340-344 ◽  
Author(s):  
W. Girsch ◽  
M Bijak ◽  
G. Heger ◽  
R. Koller ◽  
H. Lanmüller ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Muscle Tension ◽  
Close Correlation ◽  
Simultaneous Recording ◽  
Force Transducer ◽  
Instrumentation Amplifier ◽  
M Wave ◽  
Intramuscular Electrodes ◽  
Stimulation Current ◽  
The Right

Functional Electrical Stimulation (FES) requires information on the stimulated muscle for adjustment of the stimulation current, avoidance of muscle fatigue during the conditioning period and long term follow-up. Several applications of chronical FES are in clinical practice, but a system for direct registration of muscle activity under FES still does not exist. In six sheep the right Latissimus Dorsi Muscle (LDM) and Thoracodorsal Nerve were exposed. Stimulation electrodes were applied to each nerve and 3 EMG-applied sensing electrodes were placed into each LDM. The LDM tendon was connected to a force transducer. Burst stimulation was applied and the amplitude was increased from 0 to 4 mA in steps from burst to burst. EMG (M-wave) was amplified and recorded continuously via modified instrumentation amplifier, oscilloscope and tape recorder. Isometric muscle tension was recorded using force transducer, AID interface and PC. Continuous EMG-recording was performed in all cases. Simultaneous recording of muscle tension and EMG revealed a close correlation (lrl=0.95, p < 0.0001) between muscle strength and amplitude of the M-wave. Continuous recording of the EMG seems to be a reliable method for direct monitoring of the stimulated muscle. Three intramuscular electrodes can provide enough information to monitor FES induced muscle activity.

scholarly journals Persistent developmental stuttering as a cortical-subcortical dysfunction: evidence from muscle activation

2008 ◽  
Vol 66 (3b) ◽  
pp. 659-664 ◽  
Author(s):  
Claudia Regina Furquim de Andrade ◽  
Fernanda Chiarion Sassi ◽  
Fabiola Juste ◽  
Lucia Iracema Zanotto de Mendonça
Keyword(s):  
Reaction Time ◽  
Muscle Activity ◽  
Muscle Activation ◽  
Muscle Tension ◽  
Strong Positive Correlation ◽  
Time Activity ◽  
Persistent Developmental Stuttering ◽  
Speech Disfluency ◽  
Developmental Stuttering ◽  
Speech Motor

BACKGROUND: One contemporary view of stuttering posits that speech disfluencies arise from anomalous speech motor control. PURPOSE: To verify the rest muscle tension and speech reaction time of fluent and stuttering adults. METHOD: 22 adults, divided in two groups: G1 - 11 fluent individuals; G2 - 11 stutterers. Electromyography recordings (inferior orbicularis oris) were collected in two different situations: during rest and in a reaction time activity. RESULTS: The groups were significantly different considering rest muscle tension (G2 higher recordings) and did not differ when considering speech reaction time and muscle activity during speech. There was a strong positive correlation between speech reaction time and speech muscle activity for G2 - the longer the speech reaction time, the higher the muscle activity during speech. CONCLUSION: In addition to perceptible episodes of speech disfluency, stutterers exhibit anomalies in speech motor output during fluent speech. Correlations with a possible cortical-subcortical disorder are discussed.

scholarly journals The Assessment Methods of Laryngeal Muscle Activity in Muscle Tension Dysphonia: A Review

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Seyyedeh Maryam Khoddami ◽  
Noureddin Nakhostin Ansari ◽  
Farzad Izadi ◽  
Saeed Talebian Moghadam
Keyword(s):  
Muscle Activity ◽  
Muscle Tension ◽  
Surface Emg ◽  
Assessment Methods ◽  
Voice Disorder ◽  
Laryngeal Muscle ◽  
Muscle Tension Dysphonia ◽  
Muscular Tension ◽  
Clinical Methods ◽  
Physiological Information

The purpose of this paper is to review the methods used for the assessment of muscular tension dysphonia (MTD). The MTD is a functional voice disorder associated with abnormal laryngeal muscle activity. Various assessment methods are available in the literature to evaluate the laryngeal hyperfunction. The case history, laryngoscopy, and palpation are clinical methods for the assessment of patients with MTD. Radiography and surface electromyography (EMG) are objective methods to provide physiological information about MTD. Recent studies show that surface EMG can be an effective tool for assessing muscular tension in MTD.

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