Spine Anatomy | Cervical, Thoracic, Lumbar

What is the spine?

The spine, sometimes called the spinal column or backbone, is a complex structure that runs along the back of one’s body. The job of the spine is to protect the spinal cord, allow movement, such as bending and twisting, and to support the body. The spine is made up of 33 vertebrae, separated by cushioning discs. The spine plays a vital role in posture, balance and mobility. It also serves as the central pathway for nerves that send signals between the brain and the body. A healthy spine works quietly in the background, allowing pain-free movement and stability. Dr. Andre Samuel has extensive training and experience in treating the spine and keeping patients in Clear Lake, Houston and the Sugar Land area healthy.

How is the spine divided?

The spine is divided in three main regions that work together to support posture, allow coordinated movement, and protect the nerves. Each region has its own role in both movement and support:

• Cervical Spine: Made up of 7 vertebrae in the neck that support the head.
• Thoracic Spine: Made up of 12 vertebrae, located in the upper back region. The thoracic spine protects vital organs and supports and stabilized the body.
• Lumbar Spine: Made up of 5 vertebrae and is often called the lower back. The lumbar spine bears most of the body’s weight.
• Sacrum: Made up of 5 vertebrae that are fused together. This section of the spine connects the spine to the pelvis.
• Coccyx: Made up of 4 fused vertebra and is often called the tail bone. The Coccyx provides an attachment site for several ligaments and muscles

What are spinal discs?

The intervertebral disc (IVD) is the soft cushion found between our spinal vertebra (back bones). Discs are made of cartilage, the same soft structure that provides cushioning in our knee and other joints. Cartilage is made of proteins, such as collagen, and water.

What is a herniated disc?

Over the course of our lives, our discs endure repetitive loads from day-to-day activities, such as lifting heaving objects, running, and even walking. This can lead to slow degeneration or “drying” of the discs as the disc loses its water content.

Our discs have a tough leathery outer layer called the annulus fibrosus (AF) and a soft jelly-like filling called the nucleus pulposus (NP). When a disc gets injured and “herniates,” the tough AF layer can tear, releasing some of the soft NP material into the narrow spinal canal, which contains our spinal nerves!

What are the other important parts of the spine?

The other structures in the spine that help the way the vertebra move and function are:

• Facet joints: These joints guide motion and provide stability
• Spinal cord and nerves: These are protected by the spine’s strong, bony structure and are responsible for transmitting signals between the brain and the rest of the body.
• Ligaments and muscles: These are important for spinal alignment, strength and controlled movement.

When any of these components are damaged or degenerate, it can lead to back pain, neck pain, nerve symptoms, or reduced mobility.

Why Spine Anatomy Matters

Understanding spine anatomy is especially important if you are experiencing back or neck pain, numbness, tingling, or weakness. Many common conditions, such as a herniated disc, degenerative disc disease, or spinal stenosis, are directly related to the structure of the spine and how it can change from time or from an injury. For patients in the Clear Lake, Houston, and the Sugar Land areas, having a clear understanding of spinal anatomy can make conversations with Dr. Samuel more meaningful and can help you understand the best treatment going forward.

Expert Spine Care Close to Home

If you are dealing with chronic neck or back pain, or if you simply want to learn more about how your spine works, we can help you! Dr. Andre Samuel provides patient-focused spine care, combining advanced medical expertise with clear, compassionate guidance to help patients move better and live with less pain. Call our office today!