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

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Jan 05, 2024 128 likes •563 views

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

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Garry Lavis

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

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STRUCTURE BIOMECHANICS

 The connection between

the lumbar spine and the pelvis.

 The SI Joint is a load

bearing joint and distribute weight from the spine to the lower extremities via the hip joints.

 Concave sacral surface.  Convex illiac surface.  Highly ligamentus joint.  Movement produced by

distal locations of the body.

 Approx 5 degrees rotation.  Approx 2mm translation.  Vulnerable to shear during

rotation and translation.

 Joint compresses during

body movement.(loadbearing)

 Although normal SIJ

movement is small, it is essential for pain free functionality.

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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

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CONCAVE SACRAL SURFACE CONVEX ILIAC SURFACE

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

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NUTATION COUNTER NUTATION

 A forward tilt/rotation

(flexion)of the sacrum in reference to the adjacent ilium.

 Nutation of the Sacrum is

considered a locked/ loadbearing position for stability

 A Backwards

tilt/rotation(extension) of the sacrum in reference to the adjacent ilium.

 Counter Nutation is

considered an unlocked position and allows articulation of the inominate.

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Nutation Counternutation

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

Locked Unlocked

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TRANSLATION GAIT.

 In the normal gait cycle,

combined movements

ccur 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.

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Integral to the biomechanics of SIJ stability is the self locking mechanism.

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The ability of the SIJ to self lock, occurs through two types of closure. Form Closure and Force Closure.

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Form Closure describes how specifically shaped, closely fitting contacts provide inherent stability independent of external load.

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Force Closure describes how external compression forces add additional stability.

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The combination of form closure and force closure establishes stability in the sacroiliac joint.

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

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

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SACROTUBEROUS LIGAMENT. LONG DORSAL SACROILIAC LIGAMENT.

 Sacrum to Ischial

Tuberosity.

 A tort or tight

Sacrotuberous Ligament will restrict nutation of the sacrum.

 Direct attachment to the

biceps Femoris muscle.

 3rd and 4th Sacrum to PSIS  A tort or tight Long

Sacroiliac Ligament will restrict counternutation of the sacrum.

 Direct attachment to TLF

and Multifitus.

Self Bracing

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STABILIZERS

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

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 Multifidus.  Transverse

Abdominis.

 Internal Oblique.  Pelvic Floor.

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Lumbar Hip SIJ

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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.

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