when it comes about nerve supply of SCM and Trapezius, it was written that" since both are the derivatives of branchial arch so both are supplied by spinal accessory nerve." but in embryology text book describing derivatives of branchial arch i donot find these muscles in the list. so i want clear picture about developmental source of these muscles and functional components of spinal accessory nerve.
thank you.
thank you Emmanouil sir for useful answer. what i got from your answer is that in straight point, these two muscles are not the derivatives of sixth arch rather they derived from mesoderm lateral to 6th arch. on the basis of this fact i can assume that the functional component of 11th cranial nerve which supply these two muscles (spinal root of accessory nerve) should be general somatic efferent (GSE) not special visceral efferent (SVE). am i right sir?
- Badges
- Science topic
- Similar topics
- Correction