Light Sleep Detection based on Surface Electromyography Signals for Nap Monitoring

This paper proposes the development of automatic sleep stage detection by using physiological signals. We aim to develop an application to assist drivers after drowsiness or fatigue detection by a commercial driver vigilance system. The proposed method used a low-cost surface electromyography (EMG) device for sleep stage detection. We investigate skeletal muscle location and EMG features from sleep stage 2 to provide an EMG-based nap monitoring system. The results showed that using only one channel of a bipolar EMG signal from an upper trapezius muscle with median power frequency can achieve 84% accuracy. We implement a MyoWare muscle sensor into the proposed nap monitoring device. The results showed that the proposed system is feasible for detecting sleep stages and waking up the napper. A combination of EMG and electroencephalogram (EEG) signals might be yield a high system performance for nap monitoring and alarm system. We will prototype a portable device to connect the application to a smartphone and test with a target group, such as truck drivers and physicians.

Sex Differences in Neck Strength Force and Activation Patterns in Collegiate Contact Sport

The purpose of this study was to assess changes in cervical musculature throughout contact-heavy collegiate ice hockey practices during a regular season of NCAA Division III ice hockey teams. In this cross-sectional study, 36 (male n = 13; female n = 23) ice hockey players participated. Data were collected over 3 testing sessions (baseline; pre-practice; post-practice). Neck circumference, neck length, head-neck segment length, isometric strength and electromyography (EMG) activity for flexion and extension were assessed. Assessments were completed approximately 1h before a contact-heavy practice and 15 min after practice. For sternocleidomastoid (SCM) muscles, males had significantly greater peak force and greater time to peak force versus females. For both left and right SCMs, both sexes had significantly greater peak EMG activity pre-practice versus baseline, and right (dominant side) SCM time to peak EMG activity was decreased post-practice compared to pre-practice. There were no significant differences for EMG activity of the upper trapezius musculature, over time or between sexes. Sex differences observed in SCM force and activation patterns of the dominant side SCM may contribute to head stabilization during head impacts. Our study is the first investigation to report changes in cervical muscle strength in men’s and women’s ice hockey players in the practical setting.

Effectiveness of Myofascial Release vs High Frequency TENS for Pain Relief and Functional Improvement in College Students with Trapezius Myalgia: A Comparative Study

Background: Trapezius Myalgia is characterized by pain in the trapezius muscle. The patient suffering from myalgia usually complaints of pain, stiffness and tightness of the upper trapezius muscle. Acute or chronic neck-shoulder pain is the hallmark of this condition. The pain in the muscle usually lasts for few days or it can be even longer. The presence of spasm in upper trapezius muscle is shown by neck pain in the back of the neck and between the bases of the neck and the shoulder. This protocol has been created that describes the design of experimental study to evaluate and compare the effect of Myofascial Release (MFR) versus High-Frequency TENS for pain relief and functional improvement in subjects with Trapezius Myalgia. Methods: The participants (n=45) will be recruited in the study suffering from Trapezius Myalgia and meeting the inclusion criteria. Two groups will be formed such that group A will be treated with Myofascial Release technique and group B will be treated with High Frequency TENS modality. The protocol will cover 4 weeks of treatment. Regular assessment will be carried out on 1st and 4th week of the rehabilitation period. During the rehabilitation period, we will evaluate pain status and functional improvement and range of motion of the neck in the subject at regular intervals. Our outcome measures will be – Numerical Pain Rating Scale (NPRS) and Neck Disability Index (NDI). Discussion: The efficacy of the intervention will be evaluated by analyzing pain relief using Numerical Pain Rating Scale (NPRS) and functional improvement by using Neck Disability Index (NDI). The result of the study will significantly provide affirmation on using these modalities for treating myalgia patients.

Myofascial Treatment for Microcirculation in Patients with Postural Neck and Shoulder Pain

Vascular impairment is a crucial factor associated with chronic muscle pain, but relevant research from the microcirculatory aspect is lacking. Here, we investigated the differences in neck muscle microcirculation detected through laser-doppler flowmetry (LDF) and cervical biomechanics by a videofluoroscopic image in asymptomatic participants and patients with postural neck and shoulder pain. To understand the mechanism behind the effect of myofascial treatment, transverse friction massage (TFM) was applied and the immediate effects of muscular intervention on microcirculation were monitored. In total, 16 asymptomatic participants and 22 patients (mean age = 26.3 ± 2.4 and 25.4 ± 3.2 years, respectively) were recruited. Their neck muscle microcirculation and spinal image sequence were assessed. The differences in the baseline blood flow between the asymptomatic and patient groups were nonsignificant. However, the standard deviations in the measurements of the upper trapezius muscle in the patients were significantly larger (p < 0.05). Regarding the TFM-induced responses of skin microcirculation, the blood flow ratio was significantly higher in the patients than in the asymptomatic participants (p < 0.05). In conclusion, postintervention hyperemia determined through noninvasive LDF may be an indicator for the understanding of the mechanism underlying massage therapies and the design of interventions for postural pain.

Upper extremity biomechanics in native and non-native signers

BACKGROUND: Individuals fluent in sign language (signers) born to non-signing, non-deaf parents (non-natives) may have a greater injury risk than signers born to signing, deaf parents (natives). A comprehensive analysis of movement while signing in natives and non-natives has not been completed and could provide insight into the greater injury prevalence of non-natives. OBJECTIVE: The objective of this study was to determine differences in upper extremity biomechanics between non-natives and natives. METHODS: Strength, ‘micro’ rests, muscle activation, ballistic signing, joint angle, and work envelope were captured across groups. RESULTS: Non-natives had fewer rests (p = 0.002) and greater activation (p = 0.008) in non-dominant upper trapezius. For ballistic signing, natives had greater anterior-posterior jerk (p = 0.033) and for joint angle, natives demonstrated greater wrist flexion-extension range of motion (p = 0.040). Natives also demonstrated greater maximum medial-lateral (p = 0.015), and greater minimum medial-lateral (p = 0.019) and superior-inferior (p = 0.027) positions. CONCLUSIONS: We observed that natives presented with more rests and less activation, but greater ballistic tendencies, joint angle, and envelope compared to non-natives. Additional work should explore potential links between these outcomes and injury risk in signers.

Comparison of Activity in Scapular Stabilizing Muscles during Knee Push-Up Plus and Modified Vojta’s 3-Point Support Exercises

Selective serratus anterior (SA) strengthening without compensatory movement of the shoulder stabilizers is essential for shoulder stability and functional movement without causing shoulder injury and dysfunction. The purpose of this study was to compare electromyographic (EMG) activity between the SA, upper trapezius (UT), lower trapezius (LT), and pectoralis major (PM) during the knee push-up plus (KPUP) and modified Vojta’s 3-point support (MV3PS) exercises. Scapular stabilizer muscle activity (UT, LT, SA, and PM) was investigated during the KPUP and MV3PS exercises in 40 healthy adults (19 males, 21 females) using surface EMG. Muscle activity of the SA was significantly higher during the MV3PS exercise than during the KPUP (p < 0.05). However, muscle activity in the PM was significantly lower during the MV3PS exercise (p < 0.05). In addition, the LT and UT showed less muscle activity during the MV3PS exercise, although the difference was not statistically significant (p > 0.05). These findings suggest that the MV3PS exercise better activates the SA than KPUP.

A comparison of efficacy of diclofenac patch and physical therapy techniques in the treatment of patients with myofascial pain disorder of the upper trapezius

Objective: This study was conducted to find the best treatment in treating the patients of myofascial syndrome for this purpose two treatment options were compared to rule out the best option of treatment in minimizing the pain, enhancing the cervical movement and in determining the pressure pain threshold of MTrp. Material and methodology: It was a comparative study. Total 60 patients were randomly allocated to each group of treatment. We compared two treatments, treatment A of 30 patients was physical therapy and 30 patients of treatment B was diclofenac patch. For seven days, these patches were applied three times per day to the MTrP area of the upper trapezius muscle. The fix’s sufficiency and security boundaries were evaluated before it was used (day 0), three days later (day 3), and six days later (day 6). Chi square test was used for checking association of treatments and different attributes of patients. Results: There is significance association was found between demographic characteristics and treatments groups with p-values less than 0.05. There is significance difference effect between both treatments using VAS pain scale and cervical active Rom and PPT of MTRP using p-value less 0.05. These results shows that physical therapy treatment effects are batter as compare to diclofenac patch. Conclusion: Physical therapy techniques and the diclofenac patch have both been shown to be helpful but significant results are shown by Group A in treating trigger points of upper trapezius by normalizing the pathophysiological reasons of trigger points of this region. Physical therapy techniques are more helpful in reducing pain and in achieving cervical movement.