Questions tagged [neuroscience]

The study of the structure and function of the nervous system and its components.

166 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
0
votes
0answers
43 views

How many end segments does the axon of a typical cortical pyramidal cell have?

I tried to do some research - starting with a Google search for "typical axonal trees" - and found the following pictures: source source (axons are red) but didn't find a concise answer to this and ...
0
votes
0answers
167 views

Evolutionary advantages of gyri

Sulci and gyri are complementary views on the very same brain-anatomical phenomenon (Note that there is the named concept of gyrification, but not of sulcification, but it's the very same process.) ...
0
votes
0answers
66 views

Simple model of dendritic processing

[I striked through some passages that might be misleading, resp. where I have been misled.] Is the following - very simplified - model biologically (or physically) plausible, explaining how ...
0
votes
0answers
2k views

Rationale behind different classification of nerve fibres

Two main types of classification of nerve fibres are numerical and Erlanger-Gasser classification, based on diameter and conduction properties. In numerical classification group Ia and Ib both have ...
0
votes
0answers
40 views

Is there any evidence to suggest that exercise reduces the side effects of caffeine?

I heard a friend say: I'm not drinking coffee this week. My body can only process the caffeine if I run at least 15km a week. I found this claim fascinating - that exercise temporarily increases ...
0
votes
0answers
93 views

Is there a lower temperature limit, below which we cannot sense a difference in temperature?

At work I have to handle samples stored at -20 and -70 degrees Celsius, and they don't feel that different to me.
0
votes
1answer
231 views

What is a reflex pathway?

I know that the pathway of nerve impulses during a reflex action is called a reflex arc. However, I want to know whether the term reflex arc can be called either a reflex path or simple reflex?
0
votes
1answer
4k views

Is there any danger in putting a magnet in your ear (next to your brain)

I recently bought some wireless earbuds that fit right in my ear, so they're very small. But the method it uses for charging is magnetic, so it has magnets built into the earbud. I was wondering if ...
0
votes
1answer
83 views

Typical firing patterns of (some) motor neurons

Since it is not so easy to imagine and visualize the behaviour of the muscles in the fingers, hand, and arm of a violinist performing a fast and accentuated trill vs. a slow and soft vibrato, I try to ...
0
votes
1answer
356 views

Why are the neurites from hair cells to spiral ganglion cells called axons?

In Kandel's Principles of Neural Science I found the following figure which shows the innervation of the organ of Corti: From the legend to this figure (30-10, p. 602): "The great majority of ...
0
votes
1answer
218 views

How are neural pathways discovered?

I have seen the spinal cord and it's a white, soft, slippery cylinder that has a small diameter (about 25-30 milimeters). It absolutely doesn't have a macroscopocally reticular texture that would ...
0
votes
1answer
50 views

Neurons competing for survival

I was reading in a book that in the process of neurogenesis - when new neurons are born - neurons compete for survival. Or in other words they have to make themselves useful to the brain otherwise ...
0
votes
1answer
8k views

How long does it take for dopamine to reach normal levels after a significant drop?

The building block sequence for is: Phenylalanine << Tyrosine << L-Dopa << Dopamine. It’s produced only in a few, very specific regions: Substantia Nigra and the Ventral Tegmental ...
-1
votes
0answers
33 views

How do we know there aren't vital chemoreceptors in the hair cells of our ears, and that the brainstem is responsible for 80% of the breathing drive?

How is the response from chemoreceptors tested, such as how do we know the brainstem is responsible for 80% of the breathing drive, and that the inner ear is not responsible for 60% of it, instead?
-1
votes
0answers
47 views

Correlation between height and nervous system response

The basis of this observation is purely anecdotal, although I do believe it holds significant weight. I am rather tall(197cm) and am quite the slow typist. However, everyone of my friends or ...
-1
votes
1answer
14 views

Do astrocytes connect and chemically communicate with other astrocytes?

I am building a novel model of neural tissue for the purposes of Machine Learning and am currently trying to unpick the functions of the astroglia. The literature suggests that astrocytes ensheath ...