Lumbar Region Ligaments
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Questions and Answers

What is the primary function of the iliolumbar ligament?

  • To prevent the posterior slide of the L5 on the S1
  • To prevent the anterior slide of the L5 on the S1 (correct)
  • To connect the lumbar spine to the thoracic spine
  • To stabilize the sacroiliac joint

    • What is the origin point of the iliolumbar ligament?

  • Transverse process of L3
  • Sacrum
  • Tips of the transverse process of L5 (correct)
  • Spinous process of L4

    • What is the name of the ligament that arises from the lower margin of the transverse process of L5 vertebra and passes obliquely inferiorly to attach on the ala of the sacrum?

  • Supraspinous ligament
  • Ligamentum flavum
  • Anterior longitudinal ligament
  • Lateral lumbosacral ligament (correct)

    • What is the name of the layer of the thoracolumbar fascia that is large, thick, and fibrous?

    <p>Posterior layer</p> Signup and view all the answers

    What is the insertion point of the iliolumbar ligament?

    <p>Iliac crest</p> Signup and view all the answers

    What is the name of the ligament that is partially continuous with the iliolumbar ligament at its origin point?

    <p>Lateral lumbosacral ligament</p> Signup and view all the answers

    How many primary bands does the iliolumbar ligament have?

    <p>Three</p> Signup and view all the answers

    What is the caudal direction of the posterior layer of the thoracolumbar fascia?

    <p>It travels caudally to the sacrum and ilium</p> Signup and view all the answers

    What happens to the inferior facet during spinal extension?

    <p>It slides inferiorly and posteriorly on the superior facet</p> Signup and view all the answers

    What occurs to the nucleus pulposus during spinal extension?

    <p>It migrates anteriorly</p> Signup and view all the answers

    What is the result of lumbar hyperextension on the facet joints?

    <p>It produces compressive loads</p> Signup and view all the answers

    What happens to the intervertebral foramen size during spinal extension?

    <p>It decreases</p> Signup and view all the answers

    What is the result of spinal flexion on the compression forces between vertebrae?

    <p>They shift away from the apophyseal joints</p> Signup and view all the answers

    What is the role of the compressed anterior aspects of the discs during spinal flexion?

    <p>They support more of the total load</p> Signup and view all the answers

    What is the result of spinal extension on the contact pressure within the apophyseal joints?

    <p>It decreases the contact pressure</p> Signup and view all the answers

    What is the typical percentage of the total spinal load supported by the apophyseal joints in erect standing?

    <p>20%</p> Signup and view all the answers

    What can a chronic posture of lumbar hyperlordosis place on the apophyseal joints and adjacent regions?

    <p>Large and potentially damaging stress</p> Signup and view all the answers

    What happens to the interspinous ligaments when the lumbar spine is hyperextended?

    <p>They compress</p> Signup and view all the answers

    How many degrees of lateral flexion can occur in the lumbar region?

    <p>20 °</p> Signup and view all the answers

    What happens to the nucleus pulposus during lateral flexion?

    <p>It deforms slightly away from the direction of the movement</p> Signup and view all the answers

    What happens to the contralateral inferior articular facet during axial rotation?

    <p>It compresses against the superior articular facet</p> Signup and view all the answers

    What is restricted by the strong sagittal plane orientation of the lumbar apophyseal joints?

    <p>Axial rotation</p> Signup and view all the answers

    What restricts axial rotation within the lumbar region?

    <p>Tension created in the stretched annulus fibrosus</p> Signup and view all the answers

    What is the direction of rotation based on?

    <p>A point on the anterior side vertebra</p> Signup and view all the answers

    What is the primary function of the lumbar region in the vertebral column?

    <p>Provide vertical stability</p> Signup and view all the answers

    Which muscles contribute to vertical stability in the lumbar region?

    <p>Lumbar multifidi</p> Signup and view all the answers

    What is the term used to describe the kinematic relationship between the lumbar spine and hip joints during sagittal plane movements?

    <p>Lumbopelvic rhythm</p> Signup and view all the answers

    In a normal kinematic strategy, what is the approximate degree of flexion of the lumbar spine during trunk flexion?

    <p>45 degrees</p> Signup and view all the answers

    What is the consequence of limited flexion in the hips during trunk flexion?

    <p>Greater flexion in the lumbar spine</p> Signup and view all the answers

    What is the primary muscle group activated during the early phase of trunk extension?

    <p>Hip extensors</p> Signup and view all the answers

    What is the characteristic of the middle phase of trunk extension?

    <p>Shared activation of hip and lumbar extensors</p> Signup and view all the answers

    What is the result of limited lumbar mobility during trunk flexion?

    <p>Greater flexion in the hips</p> Signup and view all the answers

    What happens to the lumbar spine when the pelvis undergoes anterior tilt?

    <p>It extends and increases the lordosis</p> Signup and view all the answers

    What is the effect of anterior pelvic tilt on the nucleus pulposus?

    <p>It shifts the nucleus pulposus anteriorly</p> Signup and view all the answers

    What occurs to the diameter of the intervertebral foramen when the pelvis undergoes anterior tilt?

    <p>It decreases</p> Signup and view all the answers

    When does muscle activity typically cease in the lumbar spine?

    <p>When the line of force from body weight falls posterior to the hips</p> Signup and view all the answers

    What is the effect of posterior pelvic tilt on the lumbar spine?

    <p>It flexes and decreases the lordosis</p> Signup and view all the answers

    What is the effect of posterior pelvic tilt on the nucleus pulposus?

    <p>It shifts the nucleus pulposus posteriorly</p> Signup and view all the answers

    What occurs to the diameter of the intervertebral foramen when the pelvis undergoes posterior tilt?

    <p>It increases</p> Signup and view all the answers

    What is represented by the solid black line in the diagram?

    <p>The external moment arm used by body weight</p> Signup and view all the answers

    What is the color used to represent the intensity of muscle activation in the diagram?

    <p>Red</p> Signup and view all the answers

    What is the relationship between the intensity of muscle activation and the color used in the diagram?

    <p>The greater intensity of muscle activation is represented by an increase in the intensity of red</p> Signup and view all the answers

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