Where do the cranial nerve nuclei sit in the brain?
This sounds like a difficult question, but it really isn’t. One trick for learning the cranial nerve locations is the 4-4 rule. That is to say, the bottom four brainstem nuclei (12,11, 10, and 9) sit in the medulla, while the next four (8, 7, 6, 5) are in the pons.
Cranial nerve 4 and 3 lie under the inferior and superior colliculi. CN 2 is the optic nerve, and CN is the olfactory.
Knowledge of this brainstem anatomy really helps you localize a lesion. For example, if the patient has a 6th nerve palsy and problems with hearing (CN7), the lesion is probably in the pons. If all the eye nerves 3,4,6 are gone and the patient is otherwise “OK,” then this lesion is probably NOT in the brainstem as any lesion big enough to hit BOTH the pons and midbrain would cause other systemic problems.
quite good
its written over here that “in problems oh hearing(CN7)” while it shud be CN8—-its the auditory nerve concerned with hearing and not the facial nerve which is the 7th cranial nerve….
its written over here that “in problems oh hearing(CN7)” while it shud be CN8—-its the auditory nerve concerned with hearing and not the facial nerve which is the 7th cranial nerve..
good E learning
CN 7 lesions can cause hyperacusis (i.e. hearing problems)
Excellent-thank you!!!
hyperacusis with 7th Nerve palsy
does 1,2 craniel nerve has a nucleas..?
thank you very much but i want to know viseral nuclei parasymp nuclei in brain stem
This is excellent,smartish & nice.
Very good and quite easy to memorise…apwoyo tutwal
Excellent contribution
Helpful…
@akshat goel
The Facial nerve is also responsible for the hearing as the “nerve to stapedius” a branch is inervating the stapedius muscle in the ear.