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Divine Intervention Episode 457: Horner’s Syndrome (a USMLE perspective)

» Divine Intervention Podcasts

Divine-Favour Anene

Medicine, Education, Science & Medicine, Higher Education

4.9929 Ratings

🗓️ 5 May 2023

⏱️ 9 minutes

🧾️ Download transcript

Summary

Horner’s syndrome is very commonly tested on the USMLE exams. There are however some antecedents that are not commonly emphasized that could help one pin down the exact location of the lesion. In this short podcast, I explain these in detail so you have a true understanding of the different ways this simple topic can … Continue reading Divine Intervention Episode 457: Horner’s Syndrome (a USMLE perspective)

Transcript

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0:00.0

All right to welcome my name is divine. This is episode 457 of the divine

0:06.0

intervention podcast. It's going to be a short podcast. It's going to be focusing on

0:10.7

something that's pretty pretty high yield to know. So we'll be talking about

0:14.9

Horner's Syndrome. We're going to be talking about it from a USMILI perspective. Many of us have heard of Horner

0:21.8

Syndrome and many of us know Telsus, Meiosis and Hydrosis and that's it.

0:28.1

That's true. For the most part, people to have

0:34.7

have hosis they're gonna have meiosis they're gonna have an hydrosis the only thing is there is a little more in terms of

0:38.4

complexity that you need to keep in mind with honer syndrome that many resources

0:41.7

don't cover or they just gloss over. So first let's talk about

0:47.6

the Tosis, myosis and anhydrosis and why you have those problems. Tosis means you have a droopy eyelid. Well the reason that people that have

0:56.7

Horner's syndrome have a droopy eyelid is because the superior

0:59.7

torso muscles are sympathetically innervated, superior tarsal muscles. So if those

1:06.1

muscles don't work then you will not be able to elevate your eyelid so you're

1:09.3

going to have your eyelid being dropy that's Tosis. Now we know that your dilators of your

1:16.4

popiles, your pupillary dilators, they are innervated by the sympathetic

1:20.2

system as well. So if those don't work, then your pupils will not be deleted, they'll be

1:26.1

constricted. And then finally, you're also going to have an hydrosis, the absence of

1:31.7

sweating, because again your sweat glands for the most part are also

1:35.2

controlled by your sympathetic nervous system. So this is basically a result of sympathetic

1:41.8

failure to the eye.

1:44.0

Now, the thing is, they can make you look at a life on an exam exactly where a person's Hunter syndrome is based on the symptoms that you get.

1:56.5

Because the thing is that Hunter syndrome pathway, many people just think, oh it starts

...

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