Hip Flashcards
Lumbopelvic Rhythm
Coordinated movement between the lumbar spine and the pelvis. As you bend over forward and initiate trunk flexion, the pelvis shifts posteriorly. When you reach the end of range the pelvis begins to rotate anteriorly. As the trunk returns to the upright position the hip ext muscles rotate the pelvis posteriorly through reverse action. (post pelvis tilt)
Posterior Rotation of the Pelvis
As the unsupported pelvis moves backward the stabilized femur ER.
Forward Rotation of the Pelvis
As the unsupported side moves forward, the stabilized femur IR.
Leg Length Discrepencies
Causes a lateral tilt of the pelvis and lateral trunk flexion towards the opposite side.
Leg Length Discrepency Causes
Flat foot Genu Valgum Coxa Vara Tight hip muscles Ant rotated pelvic bone Poor posture Asymmetry in bone growth
Gait Hip Flexors
Initiate swing (concentric)
Control hip ext at the end of stance
Posterior lurch of trunk = loss of flexor function
Increased lumbar lordosis/forward trunk with amb and/or decreased ext during second half of stance = contractures in hip flexors
Gait hip Extensors
Controls the hip flexors at initial contact, and the gluts initiate hip ext
Posterior lurch at foot contact = loss of enxtensor function
Gait Hip Abductors
Controls the lateral pelvic tilt during swing of opposite leg.
Trendelenburg = loss of function or the glute medius.
During stance, lateral shifting occurs over the weak side while the opposite side’s pelvis drops.
Gait Antalgic
Minimum stance on the painful side to avoid stress of weight bearing.
THA Indications
OA (most common elective)
Severe pain with motion, WB, and limited motion
Nonunion fractures
Instability, deformity
Bone tumor
Failure of conservative management
THA precautions
Cannot IR hip
Cannot cross midline
No more than 90 degree hip flex
Followed for 12 wks to year after
Hip fx signs
ER of the hip
Leg shorter
Primary innervation of the hip
L3
