Question just about which meniscus McMurray's question paper test?

With foot turned outward (heel pointing towards inside, toes point outwards), as I gradually extend the knee from full flexion, am I testing for medial or lateral meniscus?

The first big book I read (Apley) on this topic some years ago said lateral. Many subsequent sources I come across say medial.

Which one is it?

Personally I just decided to progress with which ever direction the heel points to, it's testing for that meniscus (ie. heel pointing medially, medial meniscus; heel pointing outward, lateral meniscus). Do you agree?

(A reference would be well brought-up thanks).
Answers:
My teacher said the way she remembers it is McMurray has 2 M's so its Medial Mensicus. My textbook (Mosby's guide to physical examination) say it is used to detect a torn medial or lateral meniscus. But it also says any paplpable or audible click, grinding, pain, or limited extension is a positive sign for a torn MEDIAL meniscus when you are rotating the foot and knees outward. (If your heel is out-that is pushing your knee in so that checks for medial meniscus.
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