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2. Cervical spinal nerve 4 - Wikipedia

   en.wikipedia.org/wiki/Cervical_spinal_nerve_4

   Cervical spinal nerve 4, also called C4, is a spinal nerve of the cervical segment. It originates from the spinal cord above the 4th cervical vertebra (C4). It contributes nerve fibers to the phrenic nerve , the motor nerve to the thoracoabdominal diaphragm .

3. This is why your back hurts—and how to relieve the pain - AOL

   www.aol.com/finance/why-back-hurts-relieve-pain...

   Chronic back pain, especially in middle age, can develop for several reasons, including degenerative disc disease, nerve root irritation, arthritis, or a slipped vertebra, according to Nicholas ...

4. Dermatome (anatomy) - Wikipedia

   en.wikipedia.org/wiki/Dermatome_(anatomy)

   Some referred pain due to visceral sensations refer to dermatomes that send fibers to the same level of spinal cord. A dermatome is an area of skin supplied by sensory neurons that arise from a spinal nerve ganglion. Symptoms that follow a dermatome (e.g. like pain or a rash) may indicate a pathology that involves the related nerve root ...

5. Modic changes - Wikipedia

   en.wikipedia.org/wiki/Modic_changes

   The last decade of studies on Modic changes have shown that Modic changes are associated with many treatment-resistant pain episodes and may result in patients entering a state of chronic low back pain. On average, individuals with Modic changes have had chronic pain for longer than individuals suffering from non-Modic changes back pain. [9] [10]

6. Spinal cord injury - Wikipedia

   en.wikipedia.org/wiki/Spinal_cord_injury

   Spinal cord injury; MRI of a fractured and dislocated cervical vertebra (C4) in the neck that is compressing the spinal cord: Specialty: Neurosurgery: Types: Complete, incomplete [1] Diagnostic method: Based on symptoms, medical imaging [1] Treatment: Spinal motion restriction, intravenous fluids, vasopressors [1] Frequency: c. 12,000 annually ...

7. Spinal stenosis - Wikipedia

   en.wikipedia.org/wiki/Spinal_stenosis

   Thoracic spinal stenosis, at the level of the mid-back, is much less common. [13] In lumbar stenosis, the spinal nerve roots in the lower back are compressed which can lead to symptoms of sciatica (tingling, weakness, or numbness that radiates from the low back and into the buttocks and legs). [citation needed]