Electromyography of muscles of posture: leg muscles in males

Joseph, J.; Nightingale, A.

doi:10.1113/jphysiol.1952.sp004762

Cited by 74 publications

(40 citation statements)

References 2 publications

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“…The amplifier and recording system were similar in outline to that previously described (Joseph & Nightingale, 1952). The amplifier noise level referred to the input terminals was reduced to approximately 2 uV peak to peak (approximately O-41uV r.m.s.…”

Section: Methodsmentioning

confidence: 99%

A detailed study of the electric potentials recorded over some postural muscles while relaxed and standing

Joseph¹,

Nightingale²,

Williams³

1955

The Journal of Physiology

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Section: Methodsmentioning

confidence: 99%

A detailed study of the electric potentials recorded over some postural muscles while relaxed and standing

Joseph¹,

Nightingale²,

Williams³

1955

The Journal of Physiology

Self Cite

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“…The explanation for this is that in this position of the body the line of weight usually falls in front of the centre of the knee joints. The weight of the body above the knee is supported by structures other than the hamstrings and these structures may be the ligaments of the knee joint or the gastrocnemius, in those subjects in whom that J. JOSEPH AND A. NIGHTINGALE muscle can be shown to be active (Joseph & Nightingale, 1952), or both. The popliteus appears to be excluded by the investigations of Barnet & Richardson (1953).…”

Section: Discussionmentioning

confidence: 99%

“…The amplifier used was similar to that already described (Joseph & Nightingale, 1952), except that the noise level was reduced to approximately 15 ,uV peak to peak, the minimum detectable amplitude being about 25 E V peak to peak. Brass suction electrodes 12 mm in diameter were used, and a large earthed pad was strapped to the ankle of the limb studied.…”

Section: Methodsmentioning

confidence: 99%

“…Fourteen males aged 19-24 years were investigated and three standard postures, as described in a previous paper (Joseph & Nightingale, 1952) were used: (1) standing at ease, (2) standing with 82 J. JOSEPH AND A. NIGHTINGALE weight mainly on right limb, and (3) standing with weight mainly on left limb. In some subjects additional investigations were made in order to study the effects of shifting the line of weight in relation to the knee joints.…”

Section: Methodsmentioning

confidence: 99%

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Electromyography of muscles of posture: thigh muscles in males

Joseph¹,

Nightingale²

1954

The Journal of Physiology

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“…These postures are also associated with asymmetrical muscle efforts and abnormal disc loads. Numerous EMG studies over the past four decades support this idea [2,4,5,11,17,28,29,30,31,34,38].…”

Section: Discussionmentioning

confidence: 99%

Validation of a computer analysis to determine 3-D rotations and translations of the rib cage in upright posture from three 2-D digital images

Harrison

Janik²,

Cailliet

et al. 2006

Eur Spine J

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IntroductionHuman thoracic cage posture has been of interest since ancient times, especially deformities of the rib cage [20,25,35,36,45]. In his classic texts, Breig [8][9][10] showed that human postures can cause adverse mechanical tension on the central nervous system, thus correlating abnormal posture with disease. During the past century, thoracic posture (axial translation) has been associated with the treatment of disc degeneration and prolapse [13,37,50]. Abstract Since thoracic cage posture affects lumbar spine coupling and loads on the spinal tissues and extremities, a scientific analysis of upright posture is needed. Common posture analyzers measure human posture as displacements from a plumb line, while the PosturePrintä claims to measure head, rib cage, and pelvic postures as rotations and translations. In this study, it was decided to evaluate the validity of the PosturePrintä Internet computer system's analysis of thoracic cage postures. In a university biomechanics laboratory, photographs of a mannequin thoracic cage were obtained in different postures on a stand in front of a digital camera. For each mannequin posture, three photographs were obtained (left lateral, right lateral, and AP). The mannequin thoracic cage was placed in 68 different single and combined postures (requiring 204 photographs) in five degrees of freedom: lateral translation (Tx), lateral flexion (Rz), axial rotation (Ry), flexion-extension (Rx), and anteriorposterior translation (Tz). The PosturePrintä system requires 13 reflective markers to be placed on the subject (mannequin) during photography and 16 additional ''click-on'' markers via computer mouse before a set of three photographs is analyzed by the PosturePrintä computer system over the Internet. Errors were the differences between the positioned mannequin and the calculated positions from the computer system. Average absolute value errors were obtained by comparing the exact inputted posture to the PosturePrintä's computed values. Mean and standard deviation of computational errors for sagittal displacements of the thoracic cage were Rx=0.3±0.1°, Tz=1.6±0.7 mm, and for frontal view displacements were Ry=1.2±1.0°, Rz=0.6±0.4°, and Tx=1.5±0.6 mm. The PosturePrintä system is sufficiently accurate in measuring thoracic cage postures in five degrees of freedom on a mannequin indicating the need for a further study on human subjects.

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Electromyography of muscles of posture: leg muscles in males

Cited by 74 publications

References 2 publications

A detailed study of the electric potentials recorded over some postural muscles while relaxed and standing

A detailed study of the electric potentials recorded over some postural muscles while relaxed and standing

Electromyography of muscles of posture: thigh muscles in males

Validation of a computer analysis to determine 3-D rotations and translations of the rib cage in upright posture from three 2-D digital images

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