Q ) All cranial nerves myelinated by schwann cells except :
a-CN1+2
b-CN2
c-CN3+4
d-CN5
e-CN7+8
f-CN11
g-CN 9+10
10-CN12
keepgoing Forum Fanatic
Topics: 72 Posts: 2,014
01/18/08 - 12:04 AM
#2
optic nerve
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Tiff Forum Guru
Topics: 54 Posts: 561
01/18/08 - 08:21 PM
#3
Agree CN II - optic nerve - Choice B
akm Forum Senior
Topics: 16 Posts: 218
01/18/08 - 08:48 PM
#4
Of Cranial nerves, only the Optic Nerve is not myelinated by Schwann cells. Rather, it is myelinated by Oligodendrocyes. This is why you find Optic Neuritis in Multiple Sclerosis.....
maoudoody Forum Guru
Topics: 28 Posts: 545
01/19/08 - 07:47 PM
#5
optic- part of the brain
Misrati Forum Junior
Topics: 10 Posts: 48
01/20/08 - 11:56 AM
#6
the correct answer is "A"
schwann cells derived for the neural crest and suppy the myelination of peripheral nerves sysetem , including all cranial nerves except CN2 "optic" which derived from neuroectoderm with retina and gets their myelination via Oligodendrocytes as they do for the rest of CNS , on the other hand Olfactory sysetm "including CN 1" never got any myelination supply from eiither one ..
angel23 Forum Guru
Topics: 42 Posts: 974
01/20/08 - 12:05 PM
#7
so u mean to say CN 1 is nonmyleninated or ....what myelins it then? ___________________ God please help me....Haribol!
Misrati Forum Junior
Topics: 10 Posts: 48
01/20/08 - 12:40 PM
#8
angel23 wrote: so u mean to say CN 1 is nonmyleninated or ....what myelins it then?
absolutely not , CN 1 is not myelinated angel !
angel23 Forum Guru
Topics: 42 Posts: 974
01/20/08 - 01:19 PM
#9
ok thanks...misrati ___________________ God please help me....Haribol!
dr.aki Forum Newbie
Topics: 1 Posts: 11
02/15/08 - 06:10 PM
#10
Answer is B. CN- II (Optic nerve). It is myelinated by Oligodendrocytes.
