In humans with weakness and low<unk>  tone, a<unk>  can help distinguish between myopathies (where the pathology is in the<unk>  tissue itself) and neuropathies (where the pathology is at the nerves innervating those<unk> s).<unk> es can also help to distinguish among various types of myopathies, by microscopic analysis for differing characteristics when exposed to a variety of chemical reactions and stains. However, in some cases the<unk>  alone is inadequate to distinguish between certain myopathies. For example, a<unk>  showing the nucleus pathologically located in the center of the<unk>  cell would indicate "centronuclear myopathy", but research has shown that a variety of myopathies can cause these centronuclear biopsy appearance, and hence the specific genetic testing becomes increasingly important. Additionally<unk>  is the only certain way to clarify ones<unk>  fiber types. I.e. by undergoing a<unk>  one can get a clear picture of which type of<unk> s dominates his/her body.
Muscle biopsy
Nerve biopsy
Nerve conduction study
Electromyography
Myelography
Bone biopsy
Cervicography
Magnetic resonance myelography