Podcast
Questions and Answers
What is the role of the vertebral facets in the spine?
What is the role of the vertebral facets in the spine?
- To facilitate spinal flexibility
- To help with weight bearing
- To protect the spinal cord
- To restrict motion at intervertebral segments (correct)
What is the purpose of the normal lumbar lordosis?
What is the purpose of the normal lumbar lordosis?
- To protect the vital organs
- To transfer weight from thoracic/rib cage to pelvis
- To facilitate spinal flexibility
- To absorb forces and weight bearing in the lower extremities (correct)
How do the anterior longitudinal ligament (ALL) and posterior longitudinal ligament (PLL) respond to movement?
How do the anterior longitudinal ligament (ALL) and posterior longitudinal ligament (PLL) respond to movement?
- Flexion stretches both the PLL and ALL, while extension slackens both ligaments
- Flexion slackens both the PLL and ALL, while extension stretches both ligaments
- Flexion stretches the PLL and slackens the ALL, while extension slackens both ligaments
- Flexion stretches the PLL and slackens the ALL, while extension stretches the ALL and slackens the PLL (correct)
What is the angle of inclination normal range for the femoral neck in the frontal plane?
What is the angle of inclination normal range for the femoral neck in the frontal plane?
Which ligament is known as the strongest ligament in the body and reinforces the hip capsule?
Which ligament is known as the strongest ligament in the body and reinforces the hip capsule?
What is the function of the hip abductors during single leg stance?
What is the function of the hip abductors during single leg stance?
Which muscle is responsible for combining movements of flexion at the hip and extension at the knee?
Which muscle is responsible for combining movements of flexion at the hip and extension at the knee?
Which muscle is the largest and most important hip extensor and external rotator of the hip?
Which muscle is the largest and most important hip extensor and external rotator of the hip?
Which muscle changes its action, becoming an internal rotator and abductor of the hip at 90° of hip flexion?
Which muscle changes its action, becoming an internal rotator and abductor of the hip at 90° of hip flexion?
Which spinal plane does the AO joint primarily enable motion in?
Which spinal plane does the AO joint primarily enable motion in?
What contributes to the stability and assistance with breathing in the thoracic spine?
What contributes to the stability and assistance with breathing in the thoracic spine?
What motion is limited by the articular facets in the thoracic spine?
What motion is limited by the articular facets in the thoracic spine?
What determines motion coupling during lateral flexion and rotation in the thoracic and lumbar spine?
What determines motion coupling during lateral flexion and rotation in the thoracic and lumbar spine?
What is the impact of L5-S1 facet orientation on lumbar lordosis?
What is the impact of L5-S1 facet orientation on lumbar lordosis?
Which joint serves as a source of pain in a significant percentage of people with chronic low back pain?
Which joint serves as a source of pain in a significant percentage of people with chronic low back pain?
Flashcards
Vertebral Facet Role
Vertebral Facet Role
Restrict motion at intervertebral segments.
Lumbar Lordosis Purpose
Lumbar Lordosis Purpose
Absorb forces and weight bearing in the lower extremities.
ALL/PLL Response to Movement
ALL/PLL Response to Movement
Flexion stretches the PLL, extension stretches the ALL.
Femoral Neck Angle of Inclination
Femoral Neck Angle of Inclination
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Strongest Hip Ligament
Strongest Hip Ligament
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Hip Abductor Function
Hip Abductor Function
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Muscle: Hip Flexion & Knee Extension
Muscle: Hip Flexion & Knee Extension
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Main Hip Extensor
Main Hip Extensor
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Hip Rotator Action Change
Hip Rotator Action Change
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AO Joint Motion Plane
AO Joint Motion Plane
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Thoracic Spine Stability
Thoracic Spine Stability
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Thoracic Spine Limited Motion
Thoracic Spine Limited Motion
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Motion Coupling Determinant
Motion Coupling Determinant
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L5-S1 Facet Impact
L5-S1 Facet Impact
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Chronic Low Back Pain Source
Chronic Low Back Pain Source
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Study Notes
Lumbar Spine and Sacrum Anatomy and Biomechanics
- Caliper movements increase lateral excursion of rib cage and facilitate lung volume and respiration
- Lumbar spine consists of 5 vertebrae and exhibits normal lordosis, providing stability, mobility, and support for the upper body
- Lumbar spine undergoes an average of 121 flexion movements per day, with 5-25% of work time involving lumbar flexion
- Thoracic and lumbar facets determine motion coupling during lateral flexion and rotation
- The sacrum and pelvis anatomy review includes the impact of L5-S1 facet orientation on lumbar lordosis and the role of the sacrum as the keystone of the pelvis
- The sacrum forms a closed unit of the pelvis and is connected to the pelvic bones via the sacroiliac joint (SIJ)
- The pelvic ring, consisting of the sacrum, two SIJs, ilium, pubis, and ischium, depends on the tight fit of the sacrum for stability
- The pubic symphysis is a synarthrosis joint connected by fibrocartilaginous disc and ligaments, and it may be impacted by pregnancy or injury
- The SIJ serves as a source of pain in a significant percentage of people with chronic low back pain and can be affected by trauma, instability, or inflammation
- Sacral motion includes anterior-posterior, abduction-adduction, and medial-lateral rotation, with nutation and counternutation occurring in the sagittal plane
- The sacrum's motion is relative to the ilium, and there are ligamentous structures, such as the anterior sacroiliac ligament and sacrotuberous ligament, that stabilize the SIJ
- The lumbopelvic rhythm impacts the position of the pelvis and lumbar lordosis, with muscle activation and lumbar spine position influencing sacral movement.
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