Can understanding the nucleus pulposus help in body positioning and prevention for individuals wanting to practice spinal hygiene and protect their discs from injury?

The Inner Core: Nucleus Pulposus and Spinal Discs

Nucleus Pulposus

The spinal discs are located between the spine’s vertebrae and are the body’s natural impact and shock absorbers. Within the disc is the nucleus pulposus, which plays a major role in providing the spine with shock absorption during movement. (Zhou Z. et al., 2014) The discs have a tough outer portion and a soft inner core. They are the:

Annulus Fibrosus

  • The annulus fibrosus is the outer portion of the disc.(Nosikova, Y. S. et al., 2012)
  • It forms the tough circular exterior and comprises concentric sheets of collagen fibers or lamellae surrounding the inner core.
  • It has cartilaginous endplates that firmly attach to the vertebrae above and below.

Nucleus Pulposus

  • The nucleus pulposus is the inner core soft filling of the discs.
  • It contains a network of fibers suspended in a mucoprotein gel with a water base to maintain strength and pliability.
  • The near-liquid consistency makes it responsive to movement to handle the body’s axial load.
  • It helps maintain spinal suspension to prevent pressure on the bones and prevent bone-to-bone contact, reducing the potential for injuries and pain.

Shock Absorber

Each intervertebral disc is a shock-absorbing cushion, with the nucleus pulposus providing shock-absorbing properties (Zhou Z. et al., 2014). The intervertebral discs move as the body moves. For example, when arching the back, the disc moves forward slightly, and when twisting, the disc twists as well.

Spinal Action

The intervertebral disc supports spinal movements. When bending, twisting, arching, or tilting the spine, the nucleus pulposus swivels to accommodate these actions. These repeated spinal actions, which occur throughout the day and night, contribute to shifting positions while sitting, working, playing sports, carrying groceries, performing house chores, etc. An example is bending forward to pick something up. This action involves forward spinal flexion, which is bending the spine forward, flattening, or rounding. When bending using flexion, the spinal bones come closer together, pushing the nucleus pulposus toward the back.


The disc can be pushed too far back with persistent or excessive spinal flexion. If the fibers of the annulus fibrosus become weak, they can tear, causing the nucleus pulposus to leak out and disc herniation. Generally, the nucleus pulposus will leak to the side and back; however, this corresponds to the location of the very sensitive nerve root/s with which it can come into contact, causing pain and other symptoms. The most common causes of disc herniation are degenerative wear and tear changes of the disc and trauma. Disc degeneration occurs as the body ages; it weakens the annulus fibers, allowing the nucleus pulposus to distend, bulge, or herniate.


Disc degeneration occurs with age but can also occur with injuries to the area. In young individuals, the nucleus pulposus is mostly water. For this age group, a herniation from trauma is more likely than in older individuals. (Ucar, D. et al., 2021) But as the body ages, the discs, especially the nucleus pulposus, begin to dry out. This dehydration leads to a significant loss of disc height. (UCLA Health, 2024) By age 60 or 70, the discs may be composed entirely of fiber, which can cause the shock absorption function not to work and disappear.

Chiropractic therapy is among the more conservative treatment options for a herniated disc and may be tried first before proceeding with more invasive treatments. Injury Medical Chiropractic and Functional Medicine Clinic works with primary healthcare providers and specialists to develop an optimal health and wellness solution that fully benefits the individual to get back to normal.

The Science of Functional Healing


Zhou, Z., Gao, M., Wei, F., Liang, J., Deng, W., Dai, X., Zhou, G., & Zou, X. (2014). Shock absorbing function study on denucleated intervertebral disc with or without hydrogel injection through static and dynamic biomechanical tests in vitro. BioMed research international, 2014, 461724.

Nosikova, Y. S., Santerre, J. P., Grynpas, M., Gibson, G., & Kandel, R. A. (2012). Characterization of the annulus fibrosus-vertebral body interface: identification of new structural features. Journal of anatomy, 221(6), 577–589.

Ucar, D., Duman, S., Bayram, Y., & Ucar, B. Y. (2021). Extruded disc herniations are experienced earlier by inactive young people in the high-tech gaming era. Journal of medicine and life, 14(3), 402–407.

UCLA Health. (2024). Degenerative disc disease (Conditions Treated, Issue.

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The information herein on "The Inner Core: Nucleus Pulposus and Spinal Discs" is not intended to replace a one-on-one relationship with a qualified health care professional or licensed physician and is not medical advice. We encourage you to make healthcare decisions based on your research and partnership with a qualified healthcare professional.

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Specialties: Stopping the PAIN! We Specialize in Treating Severe Sciatica, Neck-Back Pain, Whiplash, Headaches, Knee Injuries, Sports Injuries, Dizziness, Poor Sleep, Arthritis. We use advanced proven therapies focused on optimal Mobility, Posture Control, Deep Health Instruction, Integrative & Functional Medicine, Functional Fitness, Chronic Degenerative Disorder Treatment Protocols, and Structural Conditioning. We also integrate Wellness Nutrition, Wellness Detoxification Protocols and Functional Medicine for chronic musculoskeletal disorders. We use effective "Patient Focused Diet Plans", Specialized Chiropractic Techniques, Mobility-Agility Training, Cross-Fit Protocols, and the Premier "PUSH Functional Fitness System" to treat patients suffering from various injuries and health problems. Ultimately, I am here to serve my patients and community as a Chiropractor passionately restoring functional life and facilitating living through increased mobility. Purpose & Passions: I am a Doctor of Chiropractic specializing in progressive cutting-edge therapies and functional rehabilitation procedures focused on clinical physiology, total health, functional strength training, functional medicine, and complete conditioning. We focus on restoring normal body functions after neck, back, spinal and soft tissue injuries. We use Specialized Chiropractic Protocols, Wellness Programs, Functional & Integrative Nutrition, Agility & Mobility Fitness Training and Cross-Fit Rehabilitation Systems for all ages. As an extension to dynamic rehabilitation, we too offer our patients, disabled veterans, athletes, young and elder a diverse portfolio of strength equipment, high-performance exercises and advanced agility treatment options. We have teamed up with the cities' premier doctors, therapist and trainers in order to provide high-level competitive athletes the options to push themselves to their highest abilities within our facilities. We've been blessed to use our methods with thousands of El Pasoans over the last 3 decades allowing us to restore our patients' health and fitness while implementing researched non-surgical methods and functional wellness programs. Our programs are natural and use the body's ability to achieve specific measured goals, rather than introducing harmful chemicals, controversial hormone replacement, un-wanted surgeries, or addictive drugs. We want you to live a functional life that is fulfilled with more energy, a positive attitude, better sleep, and less pain. Our goal is to ultimately empower our patients to maintain the healthiest way of living. With a bit of work, we can achieve optimal health together, no matter the age, ability or disability.