1)
What is "Shichmah"?
1.
Rashi: It is the width of the shoulder.
2)
What is the Kanah?
1.
Rashi: It is the top bone. It is called so, for it is round like a Kaneh (reed).
2.
Malbim: The Zero'a is below the shoulder, and the Kanah is below it the Zero'a.
3)
What would cause his shoulder to fall or his arm to break?
