High heel footwear may be destructive for the spine because of an increased erector spinae muscle bioelectrical activity and increased ground reaction forces affecting lower limbs and the spine. The aim of this study was to evaluate the changes of bioelectrical activity in cervical paraspinal muscle during gait in low and in high heel shoes in different age groups. In 31 women aged 20-25 years ...

Persons with neck pain exhibit altered patterns of muscle patterning, but limited investigations have been carried out on these alterations or muscle patterning in healthy volunteers. This study investigated the tissue motion of the dorsal neck muscles at the C4 segmental level in 15 healthy subjects during manually resisted head extension. Doppler-based tissue velocity ultrasound imaging (TVI)...

It has already been shown that anxiety is often accompanied by muscle over-activity (Jacobson, 1938). Malmo and Shagass (1949a) found that the amplitude of action potentials recorded from the neck muscles of patients with anxiety states was significantly higher than in healthy controls when both were stressed by applying painful stimuli to the forehead; but the action-potential ratings also cor...

The interstitial nucleus of Cajal (INC) is thought to control torsional and vertical head posture. Unilateral microstimulation of the INC evokes torsional head rotation to positions that are maintained until stimulation offset. Unilateral INC inactivation evokes head position-holding deficits with the head tilted in the opposite direction. However, the underlying muscle synergies for these oppo...

objective(s): the purpose of the present study was to examine the effects of l-glutamine on electromyographic (emg) activity of the quadriceps muscle injured by eccentric exercise (ee).   materials and methods: seventeen healthy men (age: 22.35±2.27 yr; body mass: 69.91±9.78 kg; height: 177.08±4.32 cm) were randomly and double-blind study with subjects assigned to either an l-glutamine suppleme...

Purpose: Neck pain is one of the most common health problems that its prevalence ranges from 34% to 50%. Chronic Neck Pain (CNP) is also a frequent complaint in the general population. The pathogenesis of nonspecific CNP is not clear. This study aimed to assess the effects of soft tissue release, muscle energy techniques and exercise on neck Range of Motion (ROM), Neck Disability Index (NDI), an...

Computer display height and desk design are believed to be important workstation features and are included in international standards and guidelines. However, the evidence base for these guidelines is lacking a comparison of neck/shoulder muscle activity during computer and paper tasks and whether forearm support can be provided by desk design. This study measured the spinal and upper limb musc...

OBJECTIVE To evaluate the capacity of the ultrasound-based method of speckle tracking analysis to detect changes in multilayered dorsal neck muscle activity induced by performing a lifting task. SUBJECTS Twenty-one healthy individuals. DESIGN Participants performed a loaded lifting task in 3 different postural orientations of the neck (neutral, flexed and forward head posture). Ultrasound i...

We investigated the projection sites of dorsal neck muscle afferents in cats anesthetized with chloralose urethane. Electrical stimulation of a nerve branch to the biventer cervicis and complexus, and nerve branches of the suboccipital nerve to the rectus capitis dorsalis major and to the obliquus capitis caudalis muscles evoked field and single-cell responses in frontal brain regions correspon...