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37 Cards in this Set
- Front
- Back
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Type I mechanics are neutral or non-neutral?
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neutral
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Type II mechanics are neutral or non-neutral?
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non-neutral
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What part of the lower spine is exception to Fyette mechanics and why?
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L5/S1; many spinal anomalies and trauma that causes loss of stability
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Moton in lumbar spine permitted by?
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bones and joints
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Motion in lumbar spine restrained by?
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ligaments
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Motion in lumbar spine produced and stabilized by?
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muscles
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What plane are lumbar facets oriented in?
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sagittal plane
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What feature of discs contribute to lumbar lordosis?
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thicker anteriorly
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How do IV discs receive nutrition?
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they are avascular but get nutrients via diffusion from vertebrae
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What is most common disc herniation?
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L5/S1
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What feature of post long lig predisposes to disc herniation?
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it becomes smaller and weaker further down spine
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What are the 4 FB check ligs?
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supraspinous, interspinous, post long lig, capsular lig
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What is the kinetic lig and why?
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Lig flavum; purest form of elastc tissue in body, stores kinetic E
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What is the SB check lig?
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interrverse lig - anterior layer of lumbodorsal fascia
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What is the rotational check lig?
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iliolumbar lig
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How do IV discs check rotation?
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alternating direction of fibers in adjacent lamina
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What is the backbending check lig?
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ant long lig
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Describe ant long lig
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backbending check lig, 2x as strong as post, traction on lig causes osteophytes, looses elasticity and ruptures at lower force w/ age
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What is purpose of thoracolumbar fascia?
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encircle abdomen and supports spinal column
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What are 4 ways thoracolumbar fascia becomes unstable?
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weakness, hernias, incisions, pregnancy
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What is function of short paraspinal muscles?
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invol, stabilize and balane spine - cause and maintain SD
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What is function of long paraspinal m?
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vol, movers of spine
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Describe intertverse m
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deep paraspinals, attach b/t lumbar tverse processes, action - segemental SB, stabilization; inn - post primary spinal n
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Describe interspinalis m
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deep paraspinal; attaches T11-L5 on interspinous lig; action - Ext, stabilize; inn - post 1ary spinal n
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Describe rotatores brevis
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deep paraspinal; attaches tverse processes to SP 1 segment above; action - rotate segement to opposite side; inn - post 1ary spinal n
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What is attachment of rotatores longus?
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tverse process to SP 2 segments above
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What m initiates flexion of trunk?
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rectu abdominus
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What 4 m vol ext spine?
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iliocostalis lumborum, longissimus thoracis, spinalis thoracis, multifidus
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Diaphragmatic overuse or hypertonicity causes what dysfunction?
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flexed dys of upper lumbar segments
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At what part of motion does psoas major work?
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active as part of balance in seated position
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What will position of pt be w. psoas spasm?
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SB to side of spasm and flexion, obeys type II mechanics
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How will hypertonic quadratus lumborum present?
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SB to side of hypertonicity
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Where does Lat dorsi tfer lumbar and lower thoracic problems?
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shoulder
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How will serratus post inferior act in fixed inhalation (emphysema)?
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rotate L1-3 away from side of m contraction - so contraction on R causes L rotation
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Veins of the spine allow what to happen?
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spread of bladder or pelvis inf to vertebrae causing osteomyelitis ot epidural abscess; main route of metastasis of prostate cx
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Describe blood flow to spinal n roots
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when stretched to 8% of total length flow is significantly, when stretche 15% of length blood flow stops
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What happens to n roots limited in motion by fibrosis or entrapment?
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n becomes ischemic
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