Tension neck

Electromyogram (neck tension, eyeblink rate, etc.) Electrooculogram (fixation, saccades, etc.) Electroencephalogram (evoked potentials)... 

The terms tension neck, tension headache, and tension back pain are common to the primaiy care physician. These syndromes are difficult to diagnose and even more difficult to treat. A multifactorial approach, incorporating behavior modification with relaxation and lengthening exercises, is advisable. Prevention by means of global relaxation and lengthening exercises and stress modification techniques should begin in childhood and continue throughout life. 

If we load a material in compression, the force-displacement curve is simply the reverse of that for tension at small strains, but it becomes different at larger strains. As the specimen squashes down, becoming shorter and fatter to conserve volume, the load needed to keep it flowing rises (Fig. 8.6). No instability such as necking appears, and the specimen can be squashed almost indefinitely, this process only being limited eventually by severe cracking in the specimen or the plastic flow of the compression plates. 

The ultimate tensile strength (UTS) of a material refers to the maximum nominal stress that can be sustained by it and corresponds to the maximum load in a tension test. It is given by the stress associated with the highest point in a nominal stress-nominal stress plot. The ultimate tensile strengths of a ductile and of a brittle material are schematically illustrated in Figure 1.11. In the case of the ductile material the nominal stress decreases after reaching its maximum value because of necking. For such materials the UTS defines the onset of plastic instability. 

PET is not strictly Newtonian, or else it could not be fiber-forming. Polymers with the latter property develop increasing tension due to retraction forces as they become oriented, so that localized necks do not grow and become discontinuities. At high shear rates, molecular orientation will also reduce the resistance to shearing. 

Tense and relax your muscles. You may not even notice it, but as anxiety mounts your muscles tense. You may tense your neck and shoulders, your toes, or your jaw. This tension can interfere with your concentration. Release the tension held in your muscles by purposely tensing, then relaxing, each muscle. Work from your toes to your head systematically. 

This model considers the drop formation to take place in two stages, the expansion stage when the drop inflates at the nozzle tip and the detachment stage when the drop rises, forms a neck, and finally gets detached from the nozzle. The first stage is assumed to end when the buoyancy becomes equal to the interfacial tension force. For the termination of the second stage two conditions have been used, which result in two values of time of detachment. The lower of the two values is employed for calculation. 

E. Lartigau, A. Lusinchi, P. Weeger, P. Wibault, B. Luboinski, F. Eschwege, M. Guichard, Variations in tumour oxygen tension (PO2) during accelerated radiotherapy of head and neck carcinoma, Eur. J. Cancer 34(6) (1998) 856-861. 

Fiorinal with codeine butalbital, aspirin, caffeine Capsules Relief of tension headache caused by stress, muscle contraction in the head, neck, shoulder area... 

EXAMPLE 6.2 Use of the Kelvin Equation for Determining Surface Tension. Figure 6.5 shows a plot of experimental data that demonstrates the validity of the Kelvin effect. Necks of liquid cyclohexane were formed between mica surfaces at 20°C, and the radius of curvature was measured by interferometry. Vapor pressures were measured for surfaces with different curvature. Use these data to evaluate 7 for cyclohexane. Comment on the significance of the fact that the linearity of Figure 6.5 extends all the way to a p/p0 value of 0.77. 

I found that in addition to being, consciously, a loving mother and a respectable citizen, I was also unconsciously, a murderess, a pervert, a cannibal, a sadist, and a masochist. In the wake of these dreadful discoveries, I lost my fear of dentists, the clicking in my neck and throat, the arm tensions, and my dislike of clocks ticking in the bedroom. I also achieved transcendent sexual fulfillment.. . . ... 

At 9 55, I experienced a mild sense of ataxia as I walked along the hall. I gradually developed a sense of strangeness, and I felt stimulated and mildly drunk. Subsequently I felt muscle tension all over my body, but especially in the back and around the nape of the neck. My stomach felt queasy, as if with suppressed excitement, and I felt tenseness in the back of the throat. The floor seemed to be revolving in the room to some extent, and I seemed to lose sensation, in the... 

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