Which cranial nerves constitute of sympathetic nerve system? thank you.

Experts differ: Some authorities maintain that there are preganglionic sympathetic fibers in iii vii ix and x. Others will tell you this is a trick question and no cranial nerves carry sympathetic fibers. This is of limited applicability to clinical medicine and reflects arcana of neuroanatomy, a deep and amazing field. Good luck with your studies.

Several (5).: Five cranial nerves have mixed sensory, motor and parasympathetic function. The mixed cranial nerves are cn 3- occulomotor, cn 5-trigeminal, cn 7- facial, cn 9- glossopharyngeal and cn 10- vagus. The rest are predominantly sensory or motor!