Garry Lavis Diploma of Health Science Diploma of Remedial Massage. - PowerPoint PPT Presentation

Garry Lavis Diploma of Health Science Diploma of Remedial Massage. Cert iv Fitness Advanced Diploma , Myotherapy

STRUCTURE BIOMECHANICS  Movement produced by  The connection between distal locations of the body. the lumbar spine and the  Approx 5 degrees rotation. pelvis.  Approx 2mm translation.  The SI Joint is a load  Vulnerable to shear during bearing joint and distribute rotation and translation. weight from the spine to  Joint compresses during the lower extremities via body the hip joints. movement.(loadbearing)  Concave sacral surface.  Although normal SIJ movement is small, it is  Convex illiac surface. essential for pain free  Highly ligamentus joint. functionality.

 SIJ Dysfunction refers to the abnormal function of the SIJ, (Hypomobility or Hypermobility) at the Joint which places stresses on structures in or around it.  Therefor SIJ Dysfunction may contribute to lumbar, buttock, hamstring or groin pain. Brukner & Khan CSM 4th edition

CONCAVE SACRAL SURFACE CONVEX ILIAC SURFACE https://www.youtube.com/watch?v=D6NTMgWCSaU

NUTATION COUNTER NUTATION  A forward tilt/rotation  A Backwards (flexion)of the sacrum in tilt/rotation(extension) of reference to the adjacent the sacrum in reference to ilium. the adjacent ilium.  Nutation of the Sacrum is  Counter Nutation is considered a locked/ considered an unlocked loadbearing position for position and allows stability articulation of the inominate.

Nutation Counternutation Locked Unlocked https://www.google.com.au/search?hl=en&site=imghp&tbm=isch &source=hp&biw=1366&bih=643&q=articulations+of+the+SIJ&oq= articulations+of+the+SIJ&g

TRANSLATION GAIT.  In the normal gait cycle, combined movements occur conversely in the right and left innominate and spine.  Translation or forced closure (locking) occurs on the weight bearing side and an unlocking occurs on the opposite side during the swing phase.

Integral to the biomechanics of SIJ  stability is the self locking mechanism. The ability of the SIJ to self lock, occurs  through two types of closure. Form Closure and Force Closure. Form Closure describes how specifically  shaped, closely fitting contacts provide inherent stability independent of external load. Force Closure describes how external  compression forces add additional stability. The combination of form closure and  force closure establishes stability in the sacroiliac joint.

https://www.youtube.com/watch?v=D6NTMgWCSaU

https://www.youtube.com/watch?v=D6NTMgWCSaU

SACROTUBEROUS LONG DORSAL SACROILIAC LIGAMENT. LIGAMENT.  Sacrum to Ischial  3 rd and 4 th Sacrum to PSIS Tuberosity.  A tort or tight  A tort or tight Long Sacrotuberous Ligament Sacroiliac Ligament will will restrict nutation of the restrict counternutation of sacrum. the sacrum.  Direct attachment to the  Direct attachment to TLF biceps Femoris muscle. and Multifitus. Self Bracing

STABILIZERS https://www.youtube.com/watch?v=D6NTMgWCSaU

 Multifidus.  Transverse Abdominis.  Internal Oblique.  Pelvic Floor.

Lumbar Hip SIJ

• If it is SHORT – LENGTHEN it. • If it is HARD – SOFTEN it. • If it is LAZY – STIMULATE it. • If it is STIFF – MOBILISE it. • If is WEAK – STRENGTHEN it.