@Ahmed7 @Cameron @thomas.holmes @Sameem @zarathustra @Eli.Tanenbaum @shmuelsash @Jwill - I have seen both when checking KenHub, TeachMeAnatomy, Wikipedia, etc.
We sometimes have it has C5-C7 when mentioning musculocutaneous but in the biceps reflex card, we state C5-C6. Im fine with either
Amboss lists c5-c6 for biceps reflex
I think this is biceps brachii inn. vs Musculocutaneous n. fibers. c5-c6 innervate biceps prior to c7 jumping on which is where the discrepancy comes from. personally, I think the current version is more accurate but we could clarify this in the extra?
It also might make more sense if we swapped the order of c1 & c2 like so:
Biceps brachii = {{c2::C5-C6::spinal roots}} = {{c1::musculocutaneous n.::innervation}}
gives more of a āc5-c6 of the c5-c7 musculocutaneous nā feel