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Anatomy of the Pelvis
Published in Gowri Dorairajan, Management of Normal and High Risk Labour During Childbirth, 2022
Iliolumbar ligament is a V-shaped ligament, the apex of which attaches to the transverse process of a fifth lumbar vertebra from which two bands diverge – upper band attaching to the iliac crest and a lower band blending with the anterior sacroiliac ligament. The upper band provides attachment to the quadratus lumborum, continuing with the anterior layer of the lumbar fascia.
Trunk Muscles
Published in Eve K. Boyle, Vondel S. E. Mahon, Rui Diogo, Handbook of Muscle Variations and Anomalies in Humans, 2022
Eve K. Boyle, Vondel S. E. Mahon, Rui Diogo, Rowan Sherwood
Quadratus lumborum is part of the posterior abdominal wall. It attaches inferiorly to the iliac crest and iliolumbar ligament, medially to the transverses processes of the upper four lumbar vertebrae, and superiorly to the twelfth rib and twelfth thoracic vertebra (Standring 2016).
Visual Assessment of Postural Antecedents to Nonspecific Low Back Pain
Published in David Lesondak, Angeli Maun Akey, Fascia, Function, and Medical Applications, 2020
Progressive and permanent postural correction is not without difficulties: The lure of the familiar: Comfortable proprioceptive feelings will sometimes conspire to diminish progress. Therefore, specific “homework” to keep patients aware of postural correction between treatments is highly recommended.35–38More efficient postures are often not comfortable at first: Stretching long-held tissues and/or requiring lax muscles to work can produce discomfort such as muscle soreness (DOMS) or outright pain at first, so the patient must be encouraged to persevere.Fascia pulls are steady and inexorable: Although muscle stretching and training are both essential, they are often not enough on their own. Fascial sheets and structures such as the thoracolumbar fascia or the iliolumbar ligament are slower to respond, slower to heal, and thus must be reached with highly specific stretching, the hand of a manual therapist, and often both.
Association between trunk core muscle thickness and functional ability in subacute hemiplegic stroke patients: an exploratory cross-sectional study
Published in Topics in Stroke Rehabilitation, 2022
Jee Hyun Suh, Eun Chae Lee, Joo Sup Kim, Seo Yeon Yoon
Another reason for the importance of QL on functional ability is that QL controls pelvic height. Normally, the downward movement of the pelvis is seen during the stance phase and an upward movement during the swing phase equal to or less than 3 cm.43 However, stroke patients show a reverse pattern. Stroke patients tilted their pelvis on the paretic side upward (2.18 ± 3.77 cm) during the stance phase and downward (−6.6 ± 4.7 cm) during the swing phase.43 The origins of the QL are the iliac crest and iliolumbar ligament, and contraction of the QL causes the elevation of the pelvis. Thus, QL could control the abnormal movement pattern of the pelvis to a certain extent in stroke patients. The results of this study revealed a similar finding of a significant influence of the QL on the functional ability, including gait function, in hemiplegic subacute stroke patients.
Finite element modeling and static/dynamic validation of thoracolumbar-pelvic segment
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2020
All parts were meshed in ANSA 13.0 (BETA CAE Systems, International AG, Luzern, Switzerland). Vertebra excluding sacrum was divided into two parts of vertebral body and posterior structure. Vertebral body was composed of cortical bone and cancellous bone which had endplates at the top and bottom locations. Cortical bone, endplate, annulus matrix and nucleus were meshed as8-nodes hexahedral solid elements. Cancellous bone, sacrum, pelvis, articular cartilage and symphysis pubis were meshed as4-node tetrahedral solid elements. The thickness of cortical bone was from 0.5 to 1 mm (Zander et al. 2009).The annulus fibrosus ground was mesh by 6circumferential layers and 5 longitudinal layers enclosing the nucleus mesh. The annulus fibrosus ground was reinforced with annular fiber layers (only in tension) which were crossed closed to ±35° in concentric lamellaere presented by unidirectional spring elements (El-Rich et al. 2009; Schroeder et al. 2010).The ligaments included the supraspinous ligament (SSL), interspinous ligament (ISL), intertransverse ligament (ITL), ligamentumflavum (LF), capsular ligament (CL), posterior longitudinal ligament (PLL), anterior longitudinal ligament (ALL), iliolumbar ligament (ILL), sacrospinous ligament (SASL), sacrotuberous ligament (SATL), sacroiliac dorsal ligament (SADL), sacroiliac ventral ligament (SAVL) and pubic ligament (PL). The ligaments were modeled as tension-only nonlinear spring elements. A 0.5 mm gap contact interface without friction was set between every adjacent facet joints. The FE model of T12-pelvis was shown in Figure 2.