Your Nervous System and Physical Function

Think of the nervous system as the body's communication network — constantly transmitting signals between the brain and every organ, muscle, and tissue in the body. Like any communication system, the quality of the signal matters. When the pathways are clear and the spine is functioning well mechanically, the body operates the way it is designed to.

The chiropractic philosophy has long emphasized the relationship between spinal mechanics and nervous system function. This guide explains what that relationship looks like — clearly and without overreach — and why maintaining physical function is foundational to overall wellness.

How the nervous system works

The nervous system has two primary divisions: the central nervous system (brain and spinal cord) and the peripheral nervous system (the nerves that branch from the spinal cord to every part of the body). The spinal cord serves as the primary highway for information traveling between the brain and the body — motor signals traveling down, sensory signals traveling up.

The spinal cord is protected within the vertebral column. Between each pair of vertebrae, nerve roots exit through openings called intervertebral foramina and form the peripheral nerves that supply muscles, skin, and organs throughout the body. The mechanical health of these openings — their size, alignment, and the condition of the discs and joints nearby — directly influences how freely those nerve roots can function.

What mechanical spinal dysfunction does to nerve function

When spinal joints are restricted, discs are herniated, or postural dysfunction alters the alignment of the vertebral column, nerve roots can be compressed, stretched, or irritated. This produces the symptoms patients recognize: pain along a nerve path, numbness in a specific skin distribution, weakness in specific muscles, and the altered reflexes that neurological examination measures.

Beyond direct nerve compression, spinal dysfunction alters the proprioceptive input from spinal joint receptors — the sensory information the brain uses to coordinate movement, maintain balance, and regulate muscle tone. This is why spinal restriction can produce symptoms that extend beyond the local area of the restriction.

• Disc herniation at L4-L5 compresses the L5 nerve root, producing pain and numbness in a specific leg and foot distribution
• Cervical joint restriction alters upper cervical proprioceptive input, contributing to headaches and balance changes
• Thoracic restriction reduces the rib cage mobility that supports breathing mechanics
• Sacroiliac dysfunction alters pelvic mechanics and load distribution throughout the lower extremities

The body's self-regulating capacity

The body has remarkable capacity to regulate, adapt, and heal — when the mechanical foundations that support it are intact. Chiropractic care's focus on spinal mechanics is grounded in the understanding that removing mechanical interference allows the body's own regulatory systems to function more effectively.

This is not a claim that chiropractic care cures diseases or replaces medical treatment. It is the more modest and well-supported observation that a spine that moves well, with nerve roots that are not compressed, in a body that moves regularly — functions better than one that does not.

Physical function as a wellness foundation

• Movement is the stimulus for joint health, disc nutrition, and muscle maintenance
• Spinal mobility supports the nervous system's proprioceptive function — the continuous sensory mapping that coordinates movement
• Pain-free function allows the physical activity that supports cardiovascular health, metabolism, and sleep quality
• Posture and spinal alignment influence breathing mechanics, energy expenditure, and movement efficiency
• Early attention to developing mechanical problems prevents the compound effects of ignored dysfunction

Lifestyle habits that support nervous system and physical health

1. Move consistently — daily physical activity maintains joint function and the proprioceptive input the nervous system depends on.
2. Maintain posture awareness — sustained forward head position and thoracic rounding alter spinal mechanics and nerve root openings.
3. Sleep adequately — the nervous system consolidates motor learning and tissue repair primarily during sleep.
4. Manage physical stress — chronic muscle tension from sustained stress alters spinal mechanics and proprioceptive signaling.
5. Address pain early — pain that persists produces central sensitization, making the nervous system progressively more responsive to pain signals over time.
6. Periodic chiropractic evaluation — monitoring spinal mechanical function before problems become symptomatic.

What chiropractic care does and does not address

Chiropractic care evaluates and treats mechanical disorders of the spine and musculoskeletal system. It addresses the physical compression, restriction, and dysfunction that affect nerve root function and physical movement.

Chiropractic care does not treat neurological diseases, multiple sclerosis, ALS, Parkinson's disease, or other central nervous system pathologies. When evaluation findings suggest a condition beyond chiropractic scope, Dr. Simms refers patients to the appropriate medical specialist.