Assertion: nerve block | /r/HasProperty | done above the knee
Facets:
value: on the  posterior leg
type: LOCATION
Source sentences:
text: It is done above the knee on the  posterior leg where the sciatic nerve starts splitting into the common peroneal and tibial nerves.
text: Interscalene brachial plexus blocks can be done before shoulder, arm, and elbow surgery.