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/suÂ·piÂ·naÂ·tion/ (sooâ³pÄ­-naÂ´shun) [L. supinatio ] the act of assuming the supine position, or the state of being supine. Applied to the hand, the act of turning the palm forward (anteriorly) or upward, performed by lateral rotation of the forearm. Applied to the foot, it generally implies movements resulting in raising of the medial margin of the foot, hence of the longitudinal arch.
Any force that pushes the leg or pelvis upward can cause an upslip. Typical causes of upslips are motor vehicle accidents, or falling onto one knee or onto one buttock. An ilium can be shifted upward when the back muscles pull against it. This can happen while you re bending, twisting and lifting.orrecting an Upslip Physical therapists, skilled in manual therapy, are able to quickly assess your condition by observing your bony landmarks. They ll look for an elevated ilium bone while you re standing, sitting and lying in the supine (on your back) position.