The Physiology of Low Back Pain: What Is Really Happening in Your Body?

To understand how chiropractic adjustments work, it helps to examine the underlying anatomy and nervous system mechanics of the lumbar spine (lower back).

The lumbar spine consists of five complex vertebrae separated by intervertebral discs. These structures protect the spinal cord and exit roots for major nerves, including the sciatic nerve. Your lower back relies on an intricate balance between bone, muscle, ligaments, and nerves to maintain posture and permit movement.

When this system breaks down, low back pain develops through specific physiological mechanisms:

1. Joint Dysfunction and Subluxation

When a spinal segment shifts slightly out of its optimal position or loses its normal range of motion—often referred to as a subluxation or joint dysfunction—it creates local biomechanical strain. This mechanical restriction alters force distribution across adjacent joints, causing accelerated wear on intervertebral discs and facet joints.

2. Nociceptive Activation and Micro-Inflammation

Joint dysfunction causes abnormal stress on surrounding soft tissues, triggering an inflammatory cascade. Micro-trauma to ligaments and muscle fibers releases chemical mediators such as prostaglandins, histamine, and substance P. These inflammatory compounds stimulate nociceptors (pain receptors), sending high-frequency sensory signals through peripheral nerves up to the central nervous system.

3. Reflexive Muscle Guarding and Spasms

When nociceptors signal pain to the spinal cord, your central nervous system triggers a protective reflex: neighboring muscles (such as the quadratus lumborum, erector spinae, and psoas) contract tightly. While this “muscle guarding” is intended to immobilize the area and prevent further injury, continuous contraction starves tissues of oxygen (ischemia), leading to localized metabolic waste buildup, muscle fatigue, and intense spasms.

4. Proprioceptive Interference

Your joints and muscles contain specialised sensory organs called proprioceptors (such as muscle spindles and Golgi tendon organs). Proprioceptors send constant feedback to your brain about joint position and movement. Joint subluxation disrupts this communication loop, resulting in altered firing patterns to the brain, impaired balance, and compensation patterns that stress other joints in the hips, pelvis, and mid-back.

How Chiropractic Adjustments Correct Low Back Pain

Chiropractic care does not simply mask low back pain—it restores proper structural alignment and neurological function. Here is how a precise spinal adjustment breaks the cycle of low back pain:

• Restoring Normal Biomechanics: High-velocity, low-amplitude (HVLA) targeted adjustments restore full range of motion to fixated joints, reducing mechanical stress on discs and surrounding ligaments.

• Inhibiting Pain Pathways (Gate Control Theory): A chiropractic adjustment stimulates mechanoreceptors within joint capsules. Mechanoreceptive inputs travel along fast-conducting sensory nerve fibers (A-beta fibers), overriding slow-conducting pain signals (C-fibers) at the spinal cord level. This effectively “closes the gate” on pain perception in the brain.

• Reducing Muscle Hypertonicity: Mechanoreceptor stimulation activates inhibitory interneurons within the spinal cord, signaling tense surrounding muscles to relax and release spasms.

• Decreasing Local Inflammation: Restoring normal joint motion improves blood circulation and lymphatic drainage around the affected spinal segment, allowing the body to clear inflammatory waste products more efficiently.

Why Choose Internal Compass Chiropractic in Sanford, NC?

Every spine is unique. At Internal Compass Chiropractic, we combine thorough hands-on clinical assessments with modern diagnostics to identify the exact source of your lower back pain. Whether your pain stems from an acute lifting injury, prolonged desk work, postural strain, or chronic spinal compensation, our tailored care plans focus on restoring function and keeping you active.

Common Conditions We Treat:

• Lumbar spine strain and sprain

• Sciatica and pinched nerves

• Herniated or bulging discs

• Sacroiliac (SI) joint dysfunction

• Postural fatigue and chronic muscle tightness

Ready to Find Relief from Low Back Pain in Sanford, NC?

Don’t let low back pain dictate your lifestyle or slow you down. Reclaim your movement, protect your spine, and experience the difference of root-cause care.

Internal Compass Chiropractic

 Address: 135 Chatham St., Sanford, NC 27330

 Phone: (919) 888-2620