first aid says Cranial Nerve 3 ( oculomotor nerve) is only a motor nerve, but should it not be mixed

[cooldoc89]

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first aid says Cranial Nerve 3 ( oculomotor nerve) is only a motor nerve, but should it not be mixed because it carries parasympathetic fibers (sensory fibers too)...

 

[seminoma]

first aid says Cranial Nerve 3 ( oculomotor nerve) is only a motor nerve, but should it not be mixed because it carries parasympathetic fibers (sensory fibers too)...

Motor only - GSE, GVE. What sensory innervation does it provide?

 

[cooldoc89]

isn't parasympathetic nervous system (autonomic nervous system) part of the Sensory?

 

[seminoma]

Autonomics has both sensory and motor function. The parasympathetics with CN3 are motor.

 

[cooldoc89]

Does ANS system relay in the sensory cortex or does it go only to thalamus??

 

[Transposony]

Does ANS system relay in the sensory cortex or does it go only to thalamus??

Cerebral cortex (the insular and medial prefrontal regions), amygdala, stria terminalis, hypothalamus, and brainstem centers (periaqueductal gray, parabrachial pons, nucleus of the tractus solitarius, and intermediate reticular zone of the medulla).

 

[Transposony]

Pure Motor- 3, 6 and Twelve.

 

[seminoma]

Pure Motor- 3, 6 and Twelve.

plus 4 and 11

 

[Transposony]

plus 4 and 11

My mistake.
I should have written- Pure Motor (medial) CNs- 3, 6 and Twelve.
These three helps to identify the site/location of a brainstem lesion.

 

[seminoma]

My mistake.
I should have written- Pure Motor (medial) CNs- 3, 6 and Twelve.
These three helps to identify the site/location of a brainstem lesion.

Same here, but also 4.. Why don't you use 4? Because it is in the midbrain too?

 

[Transposony]

Same here, but also 4.. Why don't you use 4? Because it is in the midbrain too?

IV is not that useful since it comes out dorsally (then circles around to go ventrally) and it is the only CN which crosses (similar to CST).
While, 3, 6 and 12 not only tells you the level of the lesion (Midbrain, Pons or Medulla) but they also tells you that the lesion is in medial portion of the Brainstem.

 

[seminoma]

IV is not that useful since it comes out dorsally (then circles around to go ventrally) and it is the only CN which crosses (similar to CST).
While, 3, 6 and 12 not only tells you the level of the lesion (Midbrain, Pons or Medulla) but they also tells you that the lesion is medial portion of the Brainstem.

Ah I see. I've never had a question that tried to trick me by using 4 as an indicator of a lateral lesion (or anything other than a medial lesion). Good point though!