A comprehensive cranial nerve examination systematically assesses the function of all 12 cranial nerves through specific clinical tests: facial nerve (CN VII) is evaluated by testing eye closure and facial muscle strength; trigeminal nerve (CN V) is assessed via corneal sensation and jaw muscle strength; oculomotor, trochlear, and abducens nerves (CN III, IV, VI) are tested through eye movement tracking and convergence; optic nerve (CN II) is evaluated using visual acuity charts and pupillary responses; auditory nerve (CN VIII) is tested with tuning fork hearing assessments; and olfactory nerve (CN I) is examined through smell identification tests.
Deep Dive
Prerequisite Knowledge
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Where to go next
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Deep Dive
ASMR Cranial Nerve Exam I'm Here To HelpAdded:
Hello.
Are you here for the cranial nerve exam?
Great.
Excellent.
I will be the one administering the test.
And just real quick.
Just uh name All right. Age?
I'll get the rest I'll have the nurse get the rest post uh bit of a rush.
Don't you feel rushed.
This is just me. I'm going to take all the ample time that I need for you.
Now Let's get in a little closer right here.
>> [snorts] >> We're going to do the facial analysis first. So start here.
Okay.
Just want to observe your facial structure.
And if we how you look if we have any redness or I'm going to need to touch your face.
Do you mind?
I'm going to put on these gloves.
And I have large hands.
And uh they don't buy big enough gloves around here.
So.
But I think we can make do.
Now, I want you to close your eyes. I'm going to attempt to raise up on your eyelids, okay?
Let's try this.
Good. Good job.
Okay.
All right.
Now, it's good there.
Mhm.
>> Okay.
>> [sighs] >> I'll look straight ahead.
Just going to have a little feel of the ears.
No.
That feels good. Feels good.
This is good so far.
No.
Just look at me.
I want you to give me a big smile.
Yeah.
Keep smiling. Keep smiling.
Okay.
Now.
Show me Show me teeth. All teeth.
Yeah. All right.
Good. Good. Good. Good.
All right. Now.
Try to keep your eyes open.
All right.
I'm going to do a little bit of uh palpitations around the face. All right.
Just want to test out some reflexes and uh some sh- strengths and weaknesses that you might have around the facial area. All right. So, keep your eyes open.
Keep your eyes open. We're just going to Okay.
I'm going to push up here.
All right.
Go up top here.
Okay.
All right.
Let's do it over here.
Okay.
Go bring it down underneath the eyes.
Okay.
All right.
Right there.
Okay.
Is there any discomfort there, any pain?
Okay, good. Good. Good. Good.
Okay.
Should put that Oh, you know what?
I forgot.
Let me set this down.
We just want to make sure that you don't have a fever. You haven't had a fever or been sick the past few days, right?
Lucky me.
But just for sake.
All right.
Just stay still.
Okay.
All right.
Okay.
I also have the ear setting.
Okay, breathe.
All right.
Now we got that out of the way.
Oh, yeah. Nice job.
Let me do both of those. Hold that nice.
All right. Simple sensation of sensation. Look.
All right.
Corneal sensation. Okay.
Okay.
Now, I'm going to press this uh rubber side up against your face.
But, I want you to close your eyes, and I want you to tell me when you feel it.
Okay?
All right. So, close your eyes.
Okay.
And Okay. Good.
Okay. Good.
Okay. Good.
All right. Now, while you have your eyes closed, do you see any difference in the light?
Okay, good.
Just make sure.
Okay.
So, we got this.
I just need to one or two more things before we move on.
I'm going to grip I'm going to grip uh I'm going to grip your jaw here, and I want you to bite down.
All right. I'm going to feel your muscle strength here.
Bite.
Okay.
Mhm.
Bite.
You feel me pressing in there? Pressing in there?
No pain?
Okay.
Okay.
Press. Press.
Okay.
All right.
And What was our last thing?
I always forget this last one. This Oh, I think that's That's it. But, one for me before we move any further, I just want to make sure you have no um pain in your neck. I'm just going to move over here.
Okay.
No.
No. Just stretch your neck out.
Okay.
All right.
Turn your head.
To your right, my left.
Okay.
Okay. Now, turn your left, my right.
Okay.
All right.
All right. Look up. Up. Up.
Up. Up.
Okay.
All right.
Good. We're going to move on to this.
That worked good.
Okay. [sighs] Now, I want to check some eye movements.
Um I'm going to give you a target.
It's going to be this, okay?
I want you to follow this with your eyes.
Now, if at any point you have any kind of double vision or pain or discomfort, I want you to let me know, okay? So, just follow.
Good. Any discomfort? No.
Okay, well, I'm just going to change the color now. Okay?
Now, we'll do the purple.
Okay.
I'm trying it this. I want you to watch your target.
No double vision?
No discomfort?
Any discomfort?
Just let me know.
Okay.
All right.
Good.
Now, I do versions test. All right, we want to make sure that we want to see how far you can close in on an object coming into your face, okay? And when it when the object is distorted.
All right, [sighs] but I just want to watch your eyes.
Watch right here.
Okay.
Okay.
All right.
Watch here.
Okay.
Different color.
Target.
Watch.
Okay.
Okay.
Any pain or discomfort there?
Any problems following that thing?
All right.
Um [sighs] All right, we're going to do vision test here.
I'm going to use this light. Uh hopefully it's not Actually, yeah, we're going to use this light.
So, I'm going to use this light.
So, first for the vision test, I want to take All right, I have a vision chart here.
Matter of fact, we won't take it out of the Well, this is a Snellen chart.
And I want you to say the letter when I point it out.
Okay.
Okay.
Okay.
All right.
Okay.
Now, I want you to read the I want you to read the lowest that you can, okay?
Read it out to me.
Okay.
Read it backwards.
All right. I have some measurements on here.
And I want to get a I have a pupil chart.
And I have some uh metric measurements here where I'm going to try to measure your pupils.
>> [snorts] >> Mhm.
In this lighting, I'm about 7.
7 mm. 7 mm.
And then the distance between pupils.
>> [sighs and gasps] >> Okay.
It's 20 mm.
Okay.
And then what color is this?
Good. What color is this?
Good.
Yeah, about about about a Actually, about a 5-mm pupil in this.
All right. Now, we want to do a Do this some measurements and some pupil measurements.
We'll talk about that later.
All right. What we're going to do I'm going to um obscure one side and I want to check Okay.
Okay.
Okay.
Okay.
Okay.
>> [sighs] >> Now I'm going to do the back and forth with the pupils is one thing and we want to do the swinging test looking for relative afferent pupillary defects.
So, we just swing here.
Okay.
Everything looking good.
Good job.
I'm going to move into a hearing test.
And I just need to make I'm going to do the hearing test.
pupillary defects.
>> [sighs] >> Okay, good job.
All right.
Now Wow.
Okay.
Going to put a tone.
I'll put it first on the back like bone of your ear and then I'm going to move it to the forward.
I want you to tell me when you hear it and what side am I on, forward or back, okay?
Good.
Good.
Good job.
Go again.
Good job. All right, one more time.
Start with the left ear.
Good job.
All right.
I have a different frequency here And then I would like [snorts] to try.
Okay.
Let's see. All right. Here we go.
All right.
Nice.
All right.
What do you think of that?
New, huh? Yeah.
>> [sighs] >> Okay.
All right. Last thing.
Hold on. Just a second.
I have a three-pack of some essential oils.
I'm not going to be able to get into these.
Okay. Now that I've broken into the box.
>> Yeah.
Okay.
Now, I have a three pack of essential oils.
I want to test your odor smell.
Now, I'm going to let you see what it is.
Mhm.
I'm going to let you try to guess, okay?
Take a sniff.
Big inhale. Big inhale.
All right.
What do you think it is?
Okay. I'll write that down for you.
Okay.
Good guess. Good guess.
Right?
Okay.
Second smell.
Second smell coming in.
Mhm. That was all right. I got to get in there. Okay.
Deep breath.
One deep inhale. Inhale.
Okay.
Mhm.
That was all right. good.
What do you think that is?
Okay.
And the third which is probably mhm, my favorite.
Deep inhale.
You like that one? Yeah.
What do you think that one is?
Yeah, of course. Peppermint.
Oh, and the other two? Um the first one Yeah, you guys try it. Yeah.
Lavender and eucalyptus.
Yeah.
All wonderful smells. Lavender, peppermint, eucalyptus.
Wonderful smells.
All right.
Uh-huh.
Yes.
Yeah.
I can size you. You want a size for Yeah.
glasses.
I think I have.
Let's make sure we're all through here.
High convergence.
Eye movements, ocular motility.
>> [sighs] >> Um did the six ocular muscles, drawing movements, look for smooth movements through the pupils.
We did size chart for your pupils, we did the reaction test reading pupils.
We did direct and indirect, um, swinging test for, uh, looking for, uh, relative afferent uh, pupillary defects.
We did the hearing test with the hearing forks.
You did good on that.
Did the facial analysis.
And, yeah. So, let me, I'll take a measurement real quick.
With my new Okay.
This should be about right about there.
Should be cool.
Let's do 20.
20.
20.
Okay.
Yeah.
Okay.
Okay.
Okay.
>> Okay.
>> [sighs] >> Okay.
I'll give you those those measurements as well as your final report here.
Thank you so much for coming in.
And [sighs] uh wish you the best.
Thanks.
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