pelvic rotation


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rotation

 [ro-ta´shun]
1. the process of turning around an axis.
2. in obstetrics, the turning of the fetal head (or presenting part) for proper orientation to the pelvic axis. It should occur naturally, but if it does not it must be accomplished manually or instrumentally by the obstetrician or manually by the nurse-midwife.
3. a clinical assignment for students in a specific clinical area.
4. in dentistry, the turning of a malturned tooth into its proper position.
pelvic rotation movement of the pelvis around an imaginary axis.
site rotation the selection of sequential injection locations for a patient receiving multiple injections. A chart is frequently utilized to guide the nurse in rotating sites so that the same location is not used repeatedly, which would lead to tissue damage and irregular absorption of drugs.

pelvic rotation

one of the five major kinematic determinants of gait, involving the alternate rotation of the pelvis to the right and the left of the body's central axis. The usual pelvic rotation occurring at each hip joint in most healthy individuals is approximately 4 degrees to each side of the central axis. Pelvic rotation occurs during the stance phase of gait and involves a medial to lateral circular motion. During normal locomotion or walking, considered a progressive sinusoidal movement, pelvic rotation serves to minimize the vertical displacement of the body's center of gravity. Analysis of pelvic rotation is often a factor in diagnosis of various orthopedic diseases, deformities, and abnormal bone conditions and in the correction of pathological gaits. Compare knee-ankle interaction, knee-hip flexion, lateral pelvic displacement, pelvic tilt.
References in periodicals archive ?
The data in Table 3 represents pelvic rotation and knee flexion range of motion from kick initiation until follow through.
Pelvic rotation was significantly greater from the 45[degrees] and 60[degrees] approach angles compared to the self-selected approach angle (Table 3), which partially supports the second research hypothesis.
However, kicking from an approach angle of 45[degrees] and 60[degrees] may alter aspects of kick technique, such as enhancing pelvic rotation and thigh abduction of the kicking leg at impact, which have been reported to enable better ball contact (Barfield, 1998; Davids et al.
While no significant difference was observed for right pelvic tilt (TRPR to IDM) or the left (IAM to EAM) and right (EAM to IDM) pelvic rotations, the skilled group exhibited a trend of larger mean values.
An example of the average data output obtained after processing is provided in Figure 1, and shows a similar pattern of lumbar and pelvic rotation through the stroke although these are at different magnitudes, and the typical pattern of thigh flexion/extension observed by previous studies.
As with pelvic rotation at the catch a subtle increase in lumbar was observed with time, and at the finish as with posterior pelvic rotation greater extension of the lumbar spine was observed.
2004) and poor pelvic rotation may lead to an increased loading at the junction of the lumbar spine and pelvis, with loading of the spine in rowers being an area of concern (Bahr et al.