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Old 10-06-2012
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Neuro Neuroanatomy Two PONS questions

Q1 9 years old child is diagnosed with pontine glioma. (). After period of time he develops right sided medial strabismus and weakness of whole right face, he can't close right eye. The diagram of the pons in present here:


Neuroanatomy Two PONS questions-pons-cross-section-labels.png
click image to enlarge

Based on presentation which of the following anatomic side is involved in this child?

a) A b) B c) C d) D e) E f) F


Q2 patient develops right sided facial weakness, ataxia, vertigo, right sided decrease in hearing,left sided loss of pain/temp sensation from body, right sided horners syndrome, decreased lacrimation and dysgeusia.
The gross picture is present:

Neuroanatomy Two PONS questions-pons-gross-labels.jpg
click image to enlarge

1*Which of the following is diagnosis and which artery is invovled acording to above picture?
a) Weber's - # 1
b) Lateral medulary syndrome - #7
c) Lateral pontine syndrome - #4
d) Medial medullary syndrome- #8

2* In first picture Identify the structure responsible for vertigo and hearing problems in this patient?

a) A b) B c) C d) D e) E f) F


P.S. i think that exactly these questions (exept 1* one) are low yield, but are good ones for discussion of PONS anatomy.
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Old 10-06-2012
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Q1) d

q2)
1. C
2. ??
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1) d

2) (1) ya, it's c---due to facial n. included

(2) b or e....will go with b???

thanks
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Old 10-06-2012
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1. D
2. C (thank god i know this for sure)
3. B
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Old 10-07-2012
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My answers:

Q1) D;

Q2 1*): C
2*): C

Nice questions did you take them from a question bank/book or did you invented them?
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1)D
2)C
3)F
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So anwers are: D - C - C
Here are anatomic structures of PONS:

Neuroanatomy Two PONS questions-labeled-pons-diagram.png
click image to enlarge

Q 1. describes Facial Colliculus Syndrome, which results from diffuse pontine glioma or vascular accidents. abducens nerve and Facial nerve palsy are the characteristic features of this syndrome. Facial nerve makes genu (knee) around the abducens nerve nucleus. So if this site is compressed, both nerves will be affected: Abducens-nucleus and Facial-nerve fibers around abducens nucleus.

Q2. is Lateral pontine syndrome - AICA involved. One thing that i will always remember is that facial nerve palsy is specific for AICA lesion.
here is the full version of picture:

Neuroanatomy Two PONS questions-labeled-pons-gross.png
click image to enlarge

Q3. It's Vestibulo-Cochlear Nerve nucleus identified on picture.


Hope that helped.. will discus Medulla tomorrow, it's the easiest one imo.
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awesome labelled pictures....thanks
what's the source...???
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Quote:
Originally Posted by venky2600 View Post
awesome labelled pictures....thanks
what's the source...???
picture is from DIT study guide labeling is mine
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