The Spine Anatomy

Functional
Anatomy
CERTIFICATION

THE SPINE

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PART 2 FLIP CARDS

Use these flip cards as a tool to test your understanding and reinforce what you’ve learned.
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What are intervertebral discs, and what role do they play in the spine?

Answer

Intervertebral discs act as fibrocartilaginous cushions between vertebrae, absorbing shock and enabling limited motion such as flexion, extension, and rotation.

What are the two main components of intervertebral discs?

Answer

Anulus fibrosus is the outer fibrous ring that provides strength. Nucleus pulposus is the gelatinous core that allows for flexibility and resilience.

How do intervertebral discs contribute to movement?

Answer

While individual disc movement is minimal, significant motion is achieved when multiple discs work together.

What is the function of spinal curves?

Answer

The spine’s natural curves provide resistance and elasticity, helping to distribute body weight and axial loads, ensuring stability and efficiency.

How do ligaments contribute to spinal stability?

Answer

Ligaments like the anterior and posterior longitudinal ligaments stabilize vertebrae by joining their surfaces.

What are facet joints, and what is their function?

Answer

Facet joints connect adjacent vertebrae, enabling controlled movement while maintaining stability, especially in the cervical, thoracic, and lumbar regions.

What forms the vertebral arch, and what is its role?

Answer

The vertebral arch (pedicles, laminae, and spinous process) forms the vertebral foramen, housing and protecting the spinal cord.

What are the functions of the transverse and spinous processes?

Answer

They serve as attachment points for ligaments and muscles, contributing to spinal stability and movement.

What are the key functions of the spine?

Answer

The spine provides structural support, protects the spinal cord, and allows movement (flexion, extension, rotation).

Why is the curvature of the spine important?

Answer

The spine’s intricate design and curves ensure efficient weight distribution, structural stability, and injury prevention.

What is the function of the vertebral body?

Answer

The vertebral body is the large, drum-shaped anterior portion of each vertebra. It bears weight and withstands compressive forces. Together with the vertebral arch, it forms the boundaries of the vertebral foramen, which houses and protects the spinal cord.

What are the key components of the vertebral arch?

Answer

The vertebral arch protects the spinal cord and provides attachment points for muscles and ligaments. It consists of two pedicles and two laminae, forming a bony ring. Several bony projections extend from the vertebral arch: Four articular processes (for facet joints). Two transverse processes (for muscle/ligament attachment). One spinous process (palpable in cervical/lumbar regions).

What are the functions of intervertebral discs?

Answer

Shock absorption between vertebrae. Prevents vertebral bones from rubbing together. Helps distribute load and maintain spinal flexibility.

What are the two main parts of an intervertebral disc?

Answer

Annulus Fibrosus: Outer ring of strong fibrous bands that attach vertebrae together. Nucleus Pulposus: Gel-like center acting as the main shock absorber, rich in water and proteoglycans.

How do intervertebral discs change with age?

Answer

Lose ability to reabsorb fluid, becoming flatter and less elastic. Can lead to height reduction. Osteoarthritis and osteoporosis may cause bone spurs (osteophytes). Injury/strain can cause disc bulging or herniation, leading to back pain.

What is the role of facet joints in the spine?

Answer

Connect adjacent vertebrae and stabilize the spine. Work with intervertebral discs to facilitate movement and alignment. Allow bending, twisting, and extending while limiting excessive motion.

What type of joints are facet joints?

Answer

Synovial joints, similar to knee or elbow. Covered with articular cartilage for smooth movement. Contain synovial fluid for lubrication. Encased in a soft-tissue capsule made of ligaments.

What is the vertebral foramen, and why is it important?

Answer

The vertebral foramen is the central opening in each vertebra. It is formed by the vertebral body and vertebral arch. It houses and protects the spinal cord.

What is the function of the nucleus pulposus?

Answer

It is the soft, gel-like core of the intervertebral disc. Acts as a shock absorber, distributing weight and pressure. Contains a high-water content that decreases with age. Allows movement by letting vertebrae roll over the gel.

What is the role of the annulus fibrosus?

Answer

It is the tough outer layer of the intervertebral disc. Composed of fibrous bands in a crisscross pattern for strength. Holds the nucleus pulposus in place. Resists tensile and torsional stress to maintain spinal stability.

How do facet joints contribute to spinal pain?

Answer

Facet joints are highly innervated and can cause pain when degenerated. Conditions like arthritis (facet arthropathy) and injury can inflame these joints. Degeneration leads to restricted movement and spinal misalignment. Can contribute to low back pain and stiffness.

Functional Anatomy CERTIFICATION

THE SPINE

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