Lumbopelvic Anatomy and Kinematics Quiz

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Questions and Answers

According to Fryette's First Law, if the spine is in a neutral position, what motion occurs with left side-bending?

  • Right rotation of the vertebral segment (correct)
  • Anterosuperior glide of the vertebral segment
  • Left rotation of the vertebral segment
  • Left lateral glide of the vertebral segment

In Fryette's Second Law, concerning non-neutral mechanics, if the spine is in a state of flexion, what motion pattern is observed with right side-bending?

  • Left rotation of the vertebral segment
  • Right rotation of the vertebral segment (correct)
  • Anterior glide of the vertebral segment
  • Posterior glide of the vertebral segment

Fryette's Third Law primarily emphasizes the relationship between motion in one plane and motion in other planes. What is the main implication of this law for spinal manipulation?

  • Motion in one direction may increase or decrease motion in other directions depending on spinal position.
  • Motion in one direction enhances motion in all other directions.
  • Motion in one direction will decrease motion in all other directions. (correct)
  • Motion in one direction has no impact on motion in other directions.

Which bony landmark is typically located at the level of the L4 spinous process?

<p>Top of the Iliac Crest (C)</p> Signup and view all the answers

When palpating soft tissues in the lumbopelvic region, which of the following muscle groups would be considered hip extensors and rotators?

<p>Hip extensors/rotators (B)</p> Signup and view all the answers

Which ligament primarily limits excessive lumbar extension?

<p>Anterior longitudinal ligament (C)</p> Signup and view all the answers

The orientation of lumbar facet joints primarily limits motion in which plane?

<p>Transverse plane rotation (A)</p> Signup and view all the answers

Which structure of the intervertebral disc is in direct contact with the adjacent vertebral body?

<p>Endplate (A)</p> Signup and view all the answers

Innominate outflare is characterized by which positional change of the anterior superior iliac spine (ASIS) and posterior superior iliac spine (PSIS) on the same side?

<p>ASIS lateral and PSIS medial (A)</p> Signup and view all the answers

During sacral nutation, the sacral base moves in which direction relative to the iliac bones?

<p>Anterior and inferior (A)</p> Signup and view all the answers

According to the presented arthrokinematics, lumbar extension is associated with which facet joint movement?

<p>Inferior and anterior glide (D)</p> Signup and view all the answers

If the right lumbar facet joints are 'opened', which combination of movements is MOST likely to have occurred?

<p>Flexion, left lateral flexion, right rotation (C)</p> Signup and view all the answers

Which osteokinematic motion of the lumbar spine is MOST limited by the orientation of the facet joints?

<p>Rotation (C)</p> Signup and view all the answers

An anterior rotation of the innominate bone on the right would result in which positional change of the right PSIS relative to the left PSIS when palpated in standing?

<p>Right PSIS inferior (A)</p> Signup and view all the answers

In sacral counternutation, the articular surface of the sacrum glides in which direction relative to the innominate bones?

<p>Superoanteriorly (B)</p> Signup and view all the answers

Flashcards

Fryette's Law #1

In neutral spine, side bending and rotation occur in opposite directions.

Fryette's Law #2

In flexed or extended spine, side bending and rotation occur in the same direction.

Fryette's Law #3

Motion in one direction decreases motion in all other directions, important in manipulations.

Bony landmarks in palpation

Specific bony points used to identify anatomical structures, like spinous processes and iliac crests.

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Soft tissue palpation

Involves assessing muscular structures around the lumbopelvic region, such as erector spinae and hip muscles.

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Lumbopelvic Anatomy

The structure and components of the lumbopelvic region, including bones, ligaments, and muscles.

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Osteokinematics

The study of the movement of bones at synovial joints, particularly in the lumbopelvic area.

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Flexion of Lumbar Spine

A movement where the lumbar spine bends forward, typically ranging from 40-60 degrees.

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Extension of Lumbar Spine

A movement where the lumbar spine bends backward, typically ranging from 20-35 degrees.

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Nutation

The motion of the sacrum where it tilts forward relative to the ilia.

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Counternutation

The motion of the sacrum where it tilts backward relative to the ilia.

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Facet Joint Movement

Movement that occurs at the facet joints involving sliding without rolling.

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Innominate Dysfunctions

Abnormal motions such as inflare/outflare and anterior/posterior rotation of the pelvis.

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Lumbar Rotation Limitations

Rotation in the lumbar spine is limited primarily by facet joint orientation.

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Sacral Torsions

Twisting movements of the sacrum around its axes, affecting posture.

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Study Notes

Lumbopelvic Anatomy and Kinematics

  • Objectives: Understand the normal anatomy and osteokinematics/arthrokinematics of the lumbopelvic region. Become familiar with Fryette's laws of coupled motion. Demonstrate ability to palpate selected structures.

Lumbopelvic Anatomy

  • Lumbar Spine: Contains 5 lumbar vertebrae
  • Ligaments: Anterior longitudinal ligament, posterior longitudinal ligament, ligamentum flavum, interspinal ligament
  • Facet Joints: Orientation varies significantly (Half-moon, Flat, Asymmetric Half-moon/Flat)

Lumbopelvic Kinematics (Motion)

  • Osteokinematics:
    • Flexion: 40-60 degrees.
    • Extension: 20-35 degrees.
    • Lateral Flexion: 15-20 degrees.
    • Rotation: 3-18 degrees.
  • Rotation Limited by: Facet joint orientation
  • Nutation vs Counternutation: Types of sacral movement

Innominate Dysfunctions

  • Inflare/outflare: Positions of the innominate bone
  • Anterior/Posterior Rotation: Rotations of the innominate
  • Upslip/downslip: Upward/downward movement of the innominate

Sacral Torsions

  • Axes: Left oblique, middle transverse, and right oblique axes

Arthrokinematics

  • Facet Joint Movement: Slides without rolling
  • Intervertebral Joint Movement: Pivoting and gliding

Fryette's Laws

  • Law #1 (Neutral Spine): Sidebending and rotation occur in opposite directions
  • Law #2 (Non-Neutral Spine): Sidebending and rotation occur in the same direction
  • Law #3: Motion in one direction decreases motion in other directions

Palpation

  • Bony Landmarks: Spinous process, top of iliac crest, PSIS, sacral base, S2 spinous process, inferior lateral angle, ischial tuberosity, ASIS, AIIS, pubic symphysis
  • Soft Tissues: Erector spinae, hip abductors, hip extensors/rotators, hip flexors, hip adductors

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