Numbness in hand fingers thumb
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The median nerve provides sensation to the so-called "palmar" part of the thumb—the part with the thumbprint and the part that is hidden when you make a fist. Sensory and motor information are separated in the spinal cord, beginning from where the nerve roots enter. In addition, unless the damage is just to the superficial branch, there will likely be some degree of muscle weakness. If the numbness in your thumb or other fingers persists, it's a good idea to visit your doctor for an evaluation, but unless other signs of weakness or sudden onset are present, it's unlikely to be an emergency. There are two issues at play. Peripheral Neuropathy.
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What Causes Finger Numbness
Article Understanding Your Electromyography Results. Nerves that were once completely separate begin to run side by side, ultimately converging in the brainstem, an area no bigger around than your thumb, through which flows all information between the body and brain. Differential Diagnosis and Management. These tests evaluate the function of the nerves in your arms and legs. The hand receives its peripheral nerve supply from cords that branch out between the bones in the neck. Not only would other parts of the body be numb, but weakness would likely result as well. Rather than a subtle swelling pinching the nerve, the cause may be a bone fracture in the hand, for example.
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Why is the tip of my finger numb
The nerves run from the hand to the arm, and then to the spinal cord. Article An Overview of Occipital Neuroglia. Was this page helpful. In addition, unless the damage is just to the superficial branch, there will likely be some degree of muscle weakness. While all three nerves are involved with moving the thumb, only the radial and median nerve are involved with sensation to the thumb. Article Guide to the Peripheral Nervous System. If the tendons become inflamed, the swelling in the narrow tunnel can lead to a pinched nerve.
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