Sacroiliac kinematics for reciprocal straddle positions. 1995

G L Smidt, and K McQuade, and S H Wei, and E Barakatt
Physical Therapy Graduate Program, College of Medicine, University of Iowa, Iowa City, USA.

METHODS A descriptive and correlation approach was used to assess joint motion. OBJECTIVE Magnitudes and directions of sacroiliac motion were examined from three different upright postural conditions. BACKGROUND Evidence and clinical views suggest that sacroiliac motion available in the normal case is extremely small to nonexistent. METHODS Systems for standardizing the three postures and the Metrecom skeletal analysis system (Metrecom, Faro Technologies, Inc., Lake Mary, FL) for acquiring coordinate data for selected skeletal landmarks. RESULTS The complete sacroiliac oblique-sagittal motion that occurred between the right forward and left forward stride positions was 9 degrees (SD 6.5). The composite oblique-transverse motion was 5 degrees (SD 3.9). The motions in each plane were significantly different from zero. A joint mobility relationship existed between the hip and sacroiliac joints. CONCLUSIONS The results demonstrate that substantial angular motion is possible at the sacroiliac joints.

UI MeSH Term Description Entries
D008297 Male Males
D009068 Movement The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior. Movements
D010388 Pelvis The space or compartment surrounded by the pelvic girdle (bony pelvis). It is subdivided into the greater pelvis and LESSER PELVIS. The pelvic girdle is formed by the PELVIC BONES and SACRUM. Pelvic Region,Region, Pelvic
D011187 Posture The position or physical attitude of the body. Postures
D005260 Female Females
D006621 Hip Joint The joint that is formed by the articulation of the head of FEMUR and the ACETABULUM of the PELVIS. Acetabulofemoral Joint,Acetabulofemoral Joints,Hip Joints,Joint, Acetabulofemoral,Joint, Hip,Joints, Acetabulofemoral,Joints, Hip
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001696 Biomechanical Phenomena The properties, processes, and behavior of biological systems under the action of mechanical forces. Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D012446 Sacroiliac Joint The immovable joint formed by the lateral surfaces of the SACRUM and ILIUM. Joint, Sacroiliac,Joints, Sacroiliac,Sacroiliac Joints

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