Since C1 has no sensory function, you have seven cervical dermatomes, numbered C2 to C8. Thoracic nerves : There are 12 pairs from the torso, numbered T1 through T12. You have 12 thoracic dermatomes.

Arm numbness can occur for many reasons, including poor circulation, neuropathy, and trauma. ... Cervical spinal stenosis can lead to numbness, tingling, and weakness of your arm.

Tingling and numbness in your arm could be caused by a number of conditions such as carpal tunnel syndrome, peripheral neuropathy, or cervical radiculopathy. Many are relatively simple for your ...

Arm numbness has many possible causes ranging from mild to severe. ... Cervical spinal stenosis occurs when the hollow space of the spinal canal narrows, compressing the spinal cord.

Health care visits related to symptoms or concerns regarding the neck are common. This video reviews the cervical spine anatomy and demonstrates a physical examination of the cervical spine.

Neck pain is a common condition and affects many people in many age groups. Patients with neck pain often will also complain of shoulder and/or arm pain. All these conditions — neck pain ...

Left arm pain without chest pain can result from many issues. Some are temporary or respond to home care, while others need urgent treatment. Learn more here.