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Bones of the pelvic girdle

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Bones of the pelvic girdle

  1. 1. E.C. – Movement Analysis • Movement of your choice • 1 pg single-spaced • Points awarded based on accuracy and complexity 1
  2. 2.  Pelvis  3 fused bones: the ilium, ischium and pubis  Sacrum  Articulates with the pelvic bone, and is made up of fused vertebrae  Femur  The longest bone in the body
  3. 3.  Iliac crest  ASIS, AIIS, PSIS, PIIS  Iliac fossa
  4. 4.  Pubic symphysis  Superior ramus  Inferior ramus 5
  5. 5.  Ischial tuberosity  Ischial spine 7
  6. 6.  Supports BW  Serves as the “base”  Attachment site of many muscles  Efficient movements (LE)  Balance & equilibrium
  7. 7.  Femur  Proximal end  Head  Neck  Trochanters  Acetabulum  Acetabulofemoral joint  Obturator foramen
  8. 8. Acetabulofemoral joint Pubic Symphisis Sacroiliac Joints
  9. 9. Head Neck Greater trochanter Lesser trochanter Gluteal tuberosity
  10. 10. 1. Pubic symphysis  Pubis & pubis 2. Sacroilliac joint  Sacrum & ilium Lumbosacral joint  Lumbar & Sacrum Sacrococcygeal joint
  11. 11.  Slightly moveable  Transmits BW to pelvis  Subject to loads (GRF)  Strongest ligaments in body  Movement varies due to sex & individual diff
  12. 12.  Males  Thicker & stronger ligaments  No mobility  Females  More mobility & laxity  Monthly hormones impact laxity
  13. 13. • Anterior rotation • Movement of the upper pelvis in anterior fashion; the iliac crest tilts forward (anterior tilt). Trunk extension, hip flexion • Posterior rotation • Movement of the upper pelvis in posterior fashion; the iliac crest tilts backward (posterior tilt). Trunk flexion, hip extension
  14. 14. ANTERIOR PELVIC ROTATION POSTERIOR PELVIC ROTATION
  15. 15. • Lateral tilt (right and left) • Example (right): the right ilium moves downward in the frontal plane in relation to the left ilium. Combination of lateral flexion of trunk, adduction of left hip and abduction of right hip • Right and left transverse rotation • Example: left: The pelvis rotates left in the transverse plane. The left iliac crest moves posteriorly in relation to the right iliac crest
  16. 16. LEFT LATERAL PELVIC TILT RIGHT TRANSVERSE PELVIC ROTATION
  17. 17. The pelvic girdle is a highly moveable, relatively stable joint The hip joint, although freely moveable, is not as stable as the pelvic girdle because it does not contain as many stable, bony joints • Flexion • Movement of the femur straight anteriorly in the sagittal plane • Extension • Movement of the femur straight posteriorly in the sagittal plane.
  18. 18.  Abduction  Movement of the femur laterally to the side- away from midline  Adduction  Movement of the femur medially- toward the midline  External rotation  Rotary movement of the femur around its longitudinal axis- anterior surface moves away from midline  Internal rotation  Rotary movement of the femur around its longitudinal axis- toward midline
  19. 19. Hip Flexion Hip Extension
  20. 20. Hip Adduction Hip Abduction
  21. 21. Lateral Rotation = External Rotation Medial Rotation = Internal Rotation
  22. 22. Pelvic rotation Lumbar spine motion Right hip motion Left hip motion Anterior rotation Extension Flexion Flexion Posterior rotation Flexion Extension Extension Right lateral tilt Left lateral flexion Abduction Adduction Left lateral tilt Right lateral flexion Adduction Abduction Right transverse rotation Left lateral rotation Internal rotation External rotation Left transverse rotation Right lateral rotation External rotation Internal rotation
  23. 23.  3 df; ball & socket  Stable & mobile  Acetabulum  Cartilage is thicker at edge & top  Labrum deepens pocket  Femoral head  Cartilage thickest on head  70% articulates  Joint capsule  Strong & dense (ant, sup)
  24. 24. 1. Iliofemoral (Y) • Supports most of BW • Supports anterior hip (standing) • Resists external, internal rotation • Limits hyperextension  Only anterior pelvic tilt
  25. 25. 2. Pubofemoral • Resists abduction (primarily) • Resists external rotation (some) 3. Ischiofemoral • Resists adduction • Limits internal rotation No ligaments resist flexion (greatest ROM) P A
  26. 26.  When stabilized  Flexion of hip  Thigh fixed  Flexion of trunk  More active in mid-range  Leg raise or curl-up  Increased activity- feet held (curl-up)
  27. 27.  Origin  Transverse process of L1- 5  Insertion  Lesser trochanter of femur  Location  Anterior/Medial  Movements  Pelvis: Anterior tilt  Hip: Flexion
  28. 28.  Origin  Lateral aspect of vertebral body of T12 and L1  Insertion  Iliopecitneal eminence  Location  Anterior (more anterior than psoas major)/Medial  Movements  Pelvis: Posterior tilt (weak)  Hip: Flexion (weak) 33
  29. 29.  Origin  Iliac fossa  Insertion  Femoral lesser trochanter  Location  Anterior/Medial  Movements  Pelvis: anterior tilt  Hip: flexion
  30. 30. 35
  31. 31.  Origin  Iliac crest, inguinal ligament, thoracolumbar fascia, and costal cartilages 7-12  Insertion  Xiphoid process, linea alba, pubic crest via an aponeurosis  Location  Deep  Movements  Compress the ribs and viscera, providing thoracic and pelvic stability
  32. 32.  Plane  Axis  Action  Agonist  Antagonist 37 PHASE 1 2
  33. 33. 38 JOINT ANATOMICAL ACTION PLANE OF MOTION AXIS OF MOTION AGONIST MUSCLE(S) ANTAGONIST MUSCLE(S) Shoulder Elbow Neck Spine Hip

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