Spinal Lab 2 Flashcards
What do the zygoapophyseal joints restrict?
Restricts extension & rotation at bony end range
What shape or letter are the zygoapophyseal joints (facets)?
‘C’ shaped
What do the zygoapophyseal joints allow for in the L-Spine?
Flexion
How are L5 & S1 zygoapophyseal facets different?
S1 are larger allowing for weight bearing
The sacrum is pointed anteriorly & the spine is posterior, this blocks L5 from forward slippage
What movements occur at the SI joint?
Rotation
Superior/inferior translation
Anterior/posterior translation
Describe the shape of the SI joint
What does it resist?
What movements does it allow for?
Auricular
Knuckle shaped
Resists superior & inferior translation
Allows for rotation when walking
most fibres of the interosseous ligament are __ in direction
horizontal
with the forward flexion test the side that moves up is actually the __ side not the __ side. It is the __ locking onto the __ on that side.
tight side not the lax side. It is the innominate locking onto the sacrum on that side
what muscle helps assist the sacrotuberous ligament from preventing the sacrum from rotating anteriorly?
bicep femoris
with the sitting forward flexion test the innominate is locked in because the patient is sitting on it therefore its testing the __
sacrum
how do you know whether to treat the inflare or outflare?
treat the side of disfunction based on the forward flexion test
what is the fibre direction for the anterior, superior and posterior fibres of the iliolumbar ligament?
transverse
what movement does the anterior, superior and posterior fibres of the iliolumbar ligament prevent?
side bending
how do you test the anterior, posterior and superior fibres of the iliolumbar ligament?
patients lies on side, therapist landmarks L5, slide in to the base of the SP and push vertebrae down toward table while stabilizing the innominate with the free hand
why is the vertebral body concave?
weight bearing
the __ forms the superior and inferior portion of the vertebral foramen
pedicle
the ___ + ___ form the neural arch
pedicle + lamina
___ combine to form the SP
lamina
the ___ of the facets will dictate what movement they are guiding
orientation
Pars interarticular fracture occurs obliquely between ___ and __
superior and inferior articular facets
** Why is the articular facets of L1 different then L5-S1?
To prevent anterior translation of L5
Why is a diagonal/oblique chain so important to everyday life?
chain will assist in rotation at the hips which allows for proper gait mechanics
what impact would jumping have on the symphysis pubis, if you landed on one foot?
landing forces can be detrimental because of superior translation
What forces can the symphysis pubis joint resist, which does it allow for?
resists - shearing (superior & inferior)
allows - rotation & compression
What movement would stress the anterior SI ligament?
- hip extension
- distraction
What happens to the SIJ if hamstrings are more active than the glutes?
hamstrings will create a shearing force on the SIJ.
Glutes need to fire before hamstrings to reinforce the joint
Why is the dorsal SI ligament important for stability & mobility of the SIJ?
stability: holds the ilium to the sacrum (reinforcing the auricular surfaces)
mobility: limited but definite rotation
what is the role of the iliolumbar ligament?
- connect L4/L5 vertebrae to the ilium
- strengthen lumbrosacral jt.
- prevents anterior translation of L4/L5
- resists side bending
What muscle is associated with the iliolumbar ligament?
Quadratus Lumborum
if the ilium is restricted what impact would it have on the iliolumbar ligament?
iliolumbar ligament will also be restricted, which will attribute to stiffness/restriction of the QL
The Sacrotuberous ligament maintains stability of the SIJ & pelvis during what movement?
What is it’s main role?
Helps keep the pelvic girdle intact while resisting rotation with hip flexion
Force attenuation
