In medicine, a<unk>  is an invasive procedure in which a piece of nerve is removed from an organism and examined under a microscope. A<unk>  can lead to the discovery of various necrotizing vasculitis, amyloidosis, sarcoidosis, leprosy, metabolic neuropathies, inflammation of the nerve, loss of axon tissue, and demyelination. Biopsy literally means an examination of tissue removed from a living body to discover the presence, cause, or extent of a disease. A<unk>  may be necessary when a patient experiences numbness, pain, or weakness in places such as the fingers or toes. A<unk>  can help to determine the cause of such symptoms. The procedure is usually only performed when all other options have failed in determining the cause of a disease. It is an outpatient procedure that is performed under local anesthetic.
Nerve biopsy
Nerve conduction study
Myelography
Muscle biopsy
Cervicography
Electromyography
Magnetic resonance myelography
Optomyography