What does patellofemoral crepitations mean?

Patellofemoral crepitations is noise and/or vibration that is felt when the person bends and straightens the knee. It is a symptom of several conditions, one of which is a weakness of the kneww muscles which require exercise in the form of walking or physical therapy.

• patell = platella or knee cap
• femor = femur or thigh
• -al = pertaining to (adjective ending)
• crepitation = to crackle, crack, creak