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Questions and Answers
What is the main functional purpose of the lumbar vertebrae in the human body?
What is the main functional purpose of the lumbar vertebrae in the human body?
- Supporting the weight of the arms and head
- Resisting rotational torsion and shear
- Supporting the weight of the trunk positioned above it (correct)
- Reducing stress on the thoracic vertebrae
Which part of the spine sustains approximately 30% of the compressive loads when the spine is in hyperextension?
Which part of the spine sustains approximately 30% of the compressive loads when the spine is in hyperextension?
- Facet joints (correct)
- Annulus fibrosus
- Intervertebral discs
- Vertebral bodies
Where are contact forces largest within the spine according to the text?
Where are contact forces largest within the spine according to the text?
- Lumbar vertebrae
- Intervertebral discs
- Facet joints at L5-S1 (correct)
- Vertebral bodies
What provides about 80% of the spine's ability to resist rotational torsion and shear?
What provides about 80% of the spine's ability to resist rotational torsion and shear?
What structures are symphysis joints with fibrocartilaginous discs acting as cushions?
What structures are symphysis joints with fibrocartilaginous discs acting as cushions?
What accounts for approximately one-fourth of the height of an adult's spine?
What accounts for approximately one-fourth of the height of an adult's spine?
What is the primary function of the ligamentum flavum in the spine?
What is the primary function of the ligamentum flavum in the spine?
Which type of fibers are predominantly found in the ligamentum flavum, making it unique from other spinal ligaments?
Which type of fibers are predominantly found in the ligamentum flavum, making it unique from other spinal ligaments?
What is the term used to describe the slight, constant compression in the intervertebral discs due to the tension in the ligamentum flavum?
What is the term used to describe the slight, constant compression in the intervertebral discs due to the tension in the ligamentum flavum?
Which spinal curves are present at birth and are referred to as primary curves?
Which spinal curves are present at birth and are referred to as primary curves?
What is the term used to describe the process by which bones are shaped in response to forces acting on them?
What is the term used to describe the process by which bones are shaped in response to forces acting on them?
During which growth period does the curvature of the lumbar spine increase approximately 10%?
During which growth period does the curvature of the lumbar spine increase approximately 10%?
What is the term for the functional unit of the spine consisting of two adjacent vertebrae and the soft tissues between them?
What is the term for the functional unit of the spine consisting of two adjacent vertebrae and the soft tissues between them?
Which type of joint are the right and left facet joints between the superior and inferior articular processes of adjacent vertebrae?
Which type of joint are the right and left facet joints between the superior and inferior articular processes of adjacent vertebrae?
What serves as the primary weight-bearing component of the spine?
What serves as the primary weight-bearing component of the spine?
What is the structure formed by the neural arches, posterior side of the bodies, and intervertebral discs for protecting the spinal cord?
What is the structure formed by the neural arches, posterior side of the bodies, and intervertebral discs for protecting the spinal cord?
Which region of the spine exhibits a progressive increase in vertebral size from the cervical to lumbar region?
Which region of the spine exhibits a progressive increase in vertebral size from the cervical to lumbar region?
What is the purpose of the first two cervical vertebrae known as atlas?
What is the purpose of the first two cervical vertebrae known as atlas?
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