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Old 07-11-2010
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Question Schwann cell Myelination!

page--27
A single Schwann cell may ensheath several axons.(its only in periphery)
OR
One Schwann cell will myelinate
only one axon in peripheral nerves.

is this a mistake or i am not getting it right?

also schwann are present only on unmylinated axon even though secrete mylin themself?

Last edited by Kabutar111; 07-11-2010 at 05:52 AM. Reason: to add extra question
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Old 07-11-2010
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Arrow Yeah it's confusing

In unmyelinated axons a single Schwann cell ensheath several axons but without myelinating them (it's just the cytoplasm of the Schwann cell!)

In myelinated peripheral axons a single Schwann cell myelinate only one axon while in the central nervous system a single oligodendrocyte myelinate several axons at the same time.

This is my understanding of those paragraphs but am not sure
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Old 07-11-2010
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Stop but

Quote:
Originally Posted by lee-usmle View Post
In unmyelinated axons a single Schwann cell ensheath several axons but without myelinating them (it's just the cytoplasm of the Schwann cell!)

In myelinated peripheral axons a single Schwann cell myelinate only one axon while in the central nervous system a single oligodendrocyte myelinate several axons at the same time.

This is my understanding of those paragraph but am not sure
this is how i have understood it.
but if its ensheath several how can it cover only one with it????

odd no?
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Old 07-11-2010
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its odd but true...
single Schwann cell can ensheath several unmyelinated axons..but can myelinate only a portion of single axon not the whole axon...
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Old 07-12-2010
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If you say so.
Where else is it given because I read the concept for first time in kapalan

Quote:
Originally Posted by khushboo View Post
its odd but true...
single Schwann cell can ensheath several unmyelinated axons..but can myelinate only a portion of single axon not the whole axon...
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Old 07-12-2010
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Quote:
Originally Posted by Kabutar111 View Post
If you say so.
Where else is it given because I read the concept for first time in kapalan
i Heard in Kaplan Lectures only....
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Old 02-22-2015
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Default Probably long ago understood but...

Maybe this will help someone else understand.
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Schwann cell Myelination!-schwanmyelin.png  
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Old 02-22-2015
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Quote:
Originally Posted by khushboo View Post
i Heard in Kaplan Lectures only....
From which subject u hear that as there is no CNS physiology chapter in kaplan
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Anatomy-, Histology-, Nervous-System-

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