<prompt> Which of these muscles undergoes wasting first in osteoahritis knee?Quadriceps onlyHamstrings onlyBoth quadriceps and HamstringsGastronemius  <response>: All periaicular muscles around the knee joint may undergo wasting in advanced osteohritis knee. However muscle atrophy paicularly involves the quadriceps which is the earliest muscle to undergo wasting. Ref: Turek s Ohopaedics 2nd Edition, Page 1368. 