Diagnostic Tests For most people affected by a muscle-wasting condition, the pathway to diagnosis starts with a visit to their GP who can make a referral to a neurologist. Find out more Muscle biopsies A muscle biopsy is a procedure in which a neurologist takes a small sample of muscle, so it can be examined in a laboratory. Find out more Inheritance and genetics Muscle-wasting conditions can be passed down generations, but some can be inherited in different ways. Find out more