Introduction
The sacrum movement is not in relation to the ilia. The relationship between the ilia and the sacrum is that the ilia strengthens and provides stability. The ilium articulates with the sacrum forming the sacroiliac joint which combines to other structures forming the pelvis. The pelvis is used for weight bearing in many position. In the study performed by Gordon Alderink he explains the correlation between the pelvis sacrum and ilium. The author states, “The pelvic bony structure is inherently stable. The primary function of the pelvis is to transmit the weight of the trunk and upper extremities to the lower limbs and distribute ground reaction forces from below…While standing there is a tendency for the weight of the trunk to drive the wedge shaped sacrum down and forward between the iliac bones, essentially locking the pelvis in place” (1, p.73). This proves that the sacrum is moving because of the weight bearing above and not the ilia. The ilium is providing stability so that the sacrum does not over tilt in one direction and cause harm.
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The lumbar and sacrum articulates with each other to form lumbosacral region or in other words the “Low Back”. In the same study previously stated the author explains the movement of the sacrum when the ilia is immobilized. Alderink states, “Cadaver sacral mobility was measured with the hemi-pelvis immobilized. The sacrum appeared to follow the lumbar spine during trunk flexion, extension, side bending, and rotation. During lumbar rotation, the sacrum rotated to the same side and bent to the opposite side. If side bending was introduced first in the trunk, rotation occurred to either side. Lumbar spine traction resulted in sacral extension and lumbar compression in sacral flexion” (1, p.81). The sacrum responds to the lumbar to counter-balance the moves it makes to less likely cause injury. If the weight is to extreme the ilia will provide stability to protect the
The sacrum movement is not in relation to the ilia. The relationship between the ilia and the sacrum is that the ilia strengthens and provides stability. The ilium articulates with the sacrum forming the sacroiliac joint which combines to other structures forming the pelvis. The pelvis is used for weight bearing in many position. In the study performed by Gordon Alderink he explains the correlation between the pelvis sacrum and ilium. The author states, “The pelvic bony structure is inherently stable. The primary function of the pelvis is to transmit the weight of the trunk and upper extremities to the lower limbs and distribute ground reaction forces from below…While standing there is a tendency for the weight of the trunk to drive the wedge shaped sacrum down and forward between the iliac bones, essentially locking the pelvis in place” (1, p.73). This proves that the sacrum is moving because of the weight bearing above and not the ilia. The ilium is providing stability so that the sacrum does not over tilt in one direction and cause harm.
Body …show more content…
The lumbar and sacrum articulates with each other to form lumbosacral region or in other words the “Low Back”. In the same study previously stated the author explains the movement of the sacrum when the ilia is immobilized. Alderink states, “Cadaver sacral mobility was measured with the hemi-pelvis immobilized. The sacrum appeared to follow the lumbar spine during trunk flexion, extension, side bending, and rotation. During lumbar rotation, the sacrum rotated to the same side and bent to the opposite side. If side bending was introduced first in the trunk, rotation occurred to either side. Lumbar spine traction resulted in sacral extension and lumbar compression in sacral flexion” (1, p.81). The sacrum responds to the lumbar to counter-balance the moves it makes to less likely cause injury. If the weight is to extreme the ilia will provide stability to protect the