Podcast
Questions and Answers
According to Fryette's Law #1, if the spine is in a neutral position, which motion is coupled with left side-bending?
According to Fryette's Law #1, if the spine is in a neutral position, which motion is coupled with left side-bending?
In a non-neutral spinal position (flexed or extended), Fryette's Law #2 dictates that side-bending and rotation occur in which manner?
In a non-neutral spinal position (flexed or extended), Fryette's Law #2 dictates that side-bending and rotation occur in which manner?
Fryette's Law #3 primarily emphasizes what principle regarding spinal motion?
Fryette's Law #3 primarily emphasizes what principle regarding spinal motion?
Palpation of the top of the iliac crest corresponds to the spinous process of which lumbar vertebra?
Palpation of the top of the iliac crest corresponds to the spinous process of which lumbar vertebra?
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Which of the following soft tissue groups is NOT listed as a key area for palpation in the lumbopelvic region?
Which of the following soft tissue groups is NOT listed as a key area for palpation in the lumbopelvic region?
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Which ligament is located anteriorly along the vertebral bodies of the lumbar spine?
Which ligament is located anteriorly along the vertebral bodies of the lumbar spine?
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What is the approximate range of motion for lumbar spine flexion, as indicated in the provided content?
What is the approximate range of motion for lumbar spine flexion, as indicated in the provided content?
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What anatomical feature primarily limits rotation in the lumbopelvic region?
What anatomical feature primarily limits rotation in the lumbopelvic region?
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Which component is a structural part of the intervertebral disc in the lumbar spine?
Which component is a structural part of the intervertebral disc in the lumbar spine?
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During sacral nutation, how does the sacral articular surface glide in relation to the innominate bones?
During sacral nutation, how does the sacral articular surface glide in relation to the innominate bones?
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Which of the following is considered an innominate dysfunction?
Which of the following is considered an innominate dysfunction?
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In lumbopelvic arthrokinematics, what type of motion is primarily associated with facet joints?
In lumbopelvic arthrokinematics, what type of motion is primarily associated with facet joints?
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Which combination of movements leads to the 'closing' of facet joints in the lumbar spine?
Which combination of movements leads to the 'closing' of facet joints in the lumbar spine?
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How many vertebrae are typically fused to form the sacrum?
How many vertebrae are typically fused to form the sacrum?
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What osteokinematic motion is described as having a typical range of 20-35 degrees in the lumbopelvic region?
What osteokinematic motion is described as having a typical range of 20-35 degrees in the lumbopelvic region?
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Study Notes
Lumbopelvic Anatomy and Kinematics
- Objectives: Understand the normal anatomy and osteokinematics of the lumbopelvic region, become familiar with Fryette's laws, demonstrate palpation ability of selected structures
- Lumbar Spine: Contains 5 lumbar vertebrae, anterior longitudinal ligament, posterior longitudinal ligament, ligamentum flavum, and interspinal ligament
- Facet Joints: Facet joint orientation varies significantly. Half-moon shape (2%), flat/normal (57%), asymmetrical half-moon/flat (31%). Anomalies exist at L5-S1
- Intervertebral Disc and Endplate: Visible anatomical structures
- Lumbar Spine Muscles: Includes superficial and deep muscles, e.g., spinalis, longissimus, iliocostalis, multifidus, rotators, interspinales
- Sacrum/Coccyx: 5 fused vertebrae, coccyx (tailbone) also 5 fused vertebrae
- Pelvis: Composed of the ilium, ischium, and pubis, sacroiliac joint, hip joint, anatomical differences (gynecoid and android)
- Sacral/Pelvic Muscles: Includes gluteus medius, gluteus maximus, piriformis, gemelli, obturator internus, obturator externus, quadratus femoris
- Lumbopelvic Nerves: Lumbar plexus and sacral plexus
- Osteokinematics: Flexion (40-60°), extension (20-35°), lateral flexion (15-20°), rotation (3-18°)
- Rotation Limited by Facet Orientation: Rotation is limited by the orientation of the facet joints
- Nutation vs Counternutation: Movements of the sacrum relative to the ilium
- Innominate Dysfunctions: Includes inflares/outflares, anterior/posterior rotations, upslips/downslips
- Sacral Torsions: Left and right oblique axis, middle transverse axis (key posture)
- Arthrokinematics: Facet joint slide without roll, intervertebral joint pivot and glide, ball bearing, closing and opening of facet joints.
- Fryette's Laws: Law #1 describes opposite motion during side bending and rotation, Law #2 describes same motion in non-neutral spines, Law #3 discusses decreased motion in one direction reducing motion in other directions
- Palpation: Bony landmarks (spinous process, top of iliac crest, PSIS, sacral base) and soft tissues (erector spinae, hip adductors, abductors, extensors/rotators, flexors)
Key terminology/Anatomical structures
- ASIS: Anterior Superior Iliac Spine
- AIIS: Anterior Inferior Iliac Spine
- PSIS: Posterior Superior Iliac Spine
- ILA: Inferior Lateral Angle (of the sacrum)
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Description
Test your understanding of the anatomy and kinematics of the lumbopelvic region. This quiz covers key structures such as the lumbar spine, sacrum, and pelvis, along with relevant anatomical variations and muscular components. Be prepared to demonstrate your knowledge of Fryette's laws and palpation skills.
