Aponeurosis

Written by Dr Sheila Strover on March 14, 2025

An aponeurosis is a fibrous sheet-like expansion of a tendon, for example of the biceps femoris or quadriceps muscles.

lateral retinaculum of the kneeThe lateral retinaculum is a fine sheet of aponeurotic tissue stabilising the patella.

Lateral retinaculum is an aponeurosis

The lateral retinaculum around the patella is an extension of the fibrous 'aponeurosis' of the quadriceps muscles.