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Questions tagged [cranial-nerves]

Nerves that emerge directly from the brain.

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Do nerves work as I think they work and what does that mean for our senses?

Let me start off with a couple of metaphors. In the third Lord of the Rings film, a signal for help is sent from Minas Tirith to Gondor, using a chain of beacons. When the keepers of one of these ...
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Name of sudden chicken movements in the neck and head, and their biology and reason of existence

I would like to know what the name of the jerks caused by chickens (and lizards) moving the head (in the case of chickens), or the entire body (in the case of lizards), is, when these move in bursts. ...
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360 views

Can acetylcholine leak away from the synapse and cause spasms?

I am currently studying Pharmacology and a question came to mind. We know that Acetylcholine is used as a neurotransmitter in the neuromuscular junction, both Sympathetic as Parasympathetic, but as I ...
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102 views

Is the cranial nerve blood supply encapsulated by the blood brain barrier?

I understand the origin of cranial nerves are within the blood brain barrier. I'm assuming as they extend distally there's a point at which their vasculature is not encapsulated by the blood brain ...
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1answer
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What are cranial nerve nuclei?

I am having a really hard time trying to understand what cranial nerve nuclei are. I have been reading/watching videos and I keep hearing, "that is where the cranial nerves make connection with the ...
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318 views

A request for an overview of the cranial nerves

Is there any resource that contains motor and sensory innervations, or pathways of all the twelve cranial nerves (i.e., cranial nerve I to XII)? I have found this book chapter on the cranial nerves, ...
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686 views

What is the location of the Hypoglossal nerve?

I kind of know where the hypoglossal nerve is located when I look at the diagram, but I'd like to know how far is the nerve from the skin and where is the closest area to the skin before and right ...
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1answer
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Names of nerves in hands, shins and face

I am looking for the names of the nerves in 3 specific locations of the human body: The nerve running along the "top" (opposite side of the palm) portion of the thumb, from knuckle to fingernail (see ...
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Cranial Nerve Decussation

I want to get my head round this once and for all so if you guys could help me would really appreciate it! I understand lesions to the optic nerve. It is the other nerves that I find difficult. So ...
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341 views

Disproportion in cranial nerve innervation?

The cranial nerve innervation is highly disproportionate, as far as humans are concerned. I am not sure of the advantage of being innervated by cranial nerve versus being innervated by a normal ...
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176 views

Reflexes & Pathologies including the Vagus Nerve

I only know the vasovagal reflex. I would really appreciate if someone could inform me about the other ones. About the pathologies, I already know the effects of direct nerve damage. I am talking ...
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139 views

Does the Parasympathetic Tract of Colon Sigmoideum Travel with Nervus Vagus and its Nucleus Dorsalis Nervi Vagi?

I have the following tractus now: nucleus parasymphaticus sacrales -> nervus splanchnic -> ganglion terminalis -> colon sigmoideum The tract is parasympathetic. It suggests me that it should ...
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68 views

How do fibers control muscles?

My professor says Nervus troclearis IV somatomotor fibers supply musculus obliquus superior. and similarly for nervus oculomotorius III Nervus oculomotorius postganglionic fibers supply ...