9 votes
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Can acetylcholine leak away from the synapse and cause spasms?

The enzyme responsible for the breakdown of acetylcholine (Ach), i.e., acetylcholinesterase, rapidly degrades, and inactivates Ach in the synaptic cleft after release. This process is particularly ...
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4 votes
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What are these two nerves running parallel to the spine called?

From this closeup image, you can see there is more than one nerve on each side that is parallel to the spine. Source: imgur.com First, they are the right and left sympathetic trunk that run from the ...
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3 votes
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A request for an overview of the cranial nerves

I am not entirely sure what you are after, but I (as have others that commented on this question) interpret your question as "The linked chapter contains too much technical information". Quite frankly,...
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3 votes

What is the location of the Hypoglossal nerve?

The following image of a cadaver shows the hypoglossal highlighted: Source: StudyBlue You can see the flap of skin/muscle that has been removed to get an understanding of the thickness of tissues ...
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2 votes
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Names of nerves in hands, shins and face

You are looking for the Trigeminal nerve, the largest nerve in the face. Here it is with its branches. It is both afferent and efferent. Afferent and efferent components of the facial nerve in the ...
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2 votes

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

I'll attempt an answer, but please know you don't have a clear nor defining question to address. This is more suited for conversation or open discussion, and I recommend starting a chat on the topic. ...
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2 votes

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

I can't find a great answer to this either, but there is a known concept of a CNS-PNS transition zone, specifically as it pertains to myelination of cranial nerves. With the exception of CN 1 & 2 (...
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2 votes
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Im struggling to see how these are presynaptic terminals/knobs and not post synaptic

The fibers in green are axons and axon terminals from other neurons, not the one colored orange. Yes, there would be post-synaptic structures associated with these but those are not drawn in this ...
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1 vote
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What does it mean to say that the sympathetic nervous system is organized for diffuse activity?

"Mobilize" in this context means to: to release (something stored in the organism) for bodily use Merriam-Webster "Diffuse" means "spread out": it doesn't say anything about whether the effect is ...
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1 vote

What are cranial nerve nuclei?

Nerves (including cranial nerves) are constituted of neurons, and other supporting cells and structures (e.g. myelin sheath and extracellular protein matrix). Neurons are highly specialized cells that ...
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  • 427
1 vote

Cranial Nerve Decussation

Classically, only the CN.IV "decussates" (at the superior medullary velum) but some cranial nerve nuclei are on the contralateral side, so a lesion to the upper moto neurone or to cranial nerve ...
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1 vote

Cranial Nerve Decussation

I just wanted to add, regarding CN VII. CN VII receives stimulation via the facial nucleus from both the ipsilateral and the contralateral corticobulbar tracts. The upper muscles of facial expression ...
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