From the standpoint of modern neurology, cervical disc herniation clearly illustrates what Korean medicine refers to as qi and blood stagnation. The neck contains seven cervical vertebrae, cushioned by intervertebral discs. When an intervertebral disc slips out of place due to external trauma, poor posture, or aging, it presses on adjacent nerves. This nerve compression leads to pain, numbness, muscle weakness, and in severe cases, paresthesia in the shoulders, arms, and fingers innervated by those nerves.
This nerve compression manifests in distinct patterns throughout the upper limb. A herniation between the fifth and sixth cervical vertebrae tends to affect the thumb, index finger, and biceps brachii. When the issue lies between the sixth and seventh cervical vertebrae, symptoms appear primarily in the middle finger and triceps brachii. A herniation between the seventh cervical vertebra and first thoracic vertebra typically causes numbness in the ring and little fingers along with reduced grip strength. Observing which fingers present symptoms can help pinpoint which nerve root is compressed.
Early symptoms are often mistaken for simple muscle pain or everyday fatigue. Leaving the condition unaddressed under the assumption that rest will resolve it allows nerve compression to turn chronic, while secondary inflammatory reactions worsen the condition. The herniated disc material itself provokes inflammation around the nerve root, causing the nerve to swell and creating a vicious cycle of aggravated compression. Furthermore, persistent pain and numbness can alter the pain matrix in the brain, heightening pain sensitivity to even minor stimuli. Early diagnosis and proactive management of cervical disc herniation are therefore essential. Evaluating the disc and the degree of nerve compression through magnetic resonance imaging guides appropriate care, which may include medication, physical therapy, manual therapy, and, when indicated, surgery. Modern science continues to validate the clinical observations recorded in the Donguibogam, reminding us not to overlook the subtle signals sent by the body.
