Questions tagged [neuroanatomy]

For questions regarding specific structures in the central and peripheral nervous systems

Filter by
Sorted by
Tagged with
0
votes
0answers
11 views

Noise in Neurons (channel noise)

If you stimulate neurons 10 times with the same electrical pulse, you will get a different response 10 times. For example, if you apply a pulse near the threshold, you may get 7 APs, which are ...
2
votes
1answer
30 views

How do the outer hair cells amplify the traveling wave?

Depending on the movement frequency, outer hair cells can stretch and contract, amplifying the amplitude of the traveling wave at the basilar membrane. How can they do this exactly? what is the point ...
2
votes
1answer
31 views

Deflection of the basilar membrane

The basilar membrane becomes thicker and heavier from the basal end to the apical upper end - this is why high frequencies are perceived in the lower range and low frequencies in the upper range. But ...
4
votes
1answer
51 views

Do induced brain wave patterns give the same cognitive and perceptual consequences as those that arise naturally? [duplicate]

What I mean to ask by this particular question is that, are the effects resulting from neural interactions in the brain that cause the emergence of certain behaviours, with the neural frequencies in ...
2
votes
1answer
65 views

What is the cochlear frequency response by number of hair cells?

I am trying to recreate the cochlea/basilar membrane response to sound and want to know how the hair cells are bucketed or binned by frequency, so an ideal list would be something like 10 kHz - 12 kHz:...
-1
votes
0answers
22 views
0
votes
1answer
18 views

What is the size limit of molecules entering the intracellular sections of a neuron?

As voltage sensitive organic dyes enter the inside of neurons and quantum dots are seeking to replace these due to their higher quantum yield, I was wondering what the seize limit is, as quantum dot ...
7
votes
1answer
3k views

What are presynaptic puncta?

What are presynaptic puncta? And what makes them different from presynaptic terminals? I encountered the term puncta in the following article: Molofsky AV, Kelley KW, Tsai HH, Redmond SA, Chang SM, ...
1
vote
1answer
23 views

Are there equivalent calcium imaging molecules that fluoresce in the presence of neurotransmitters between axons?

Molecules like GCaMP fluoresce when calcium ions attach to them. I was wondering if this can work with the other neurotransmitters in the brain or compounds that transmit signals outside of neurons.
14
votes
2answers
7k views

Folding (wrinkles) in cortex: Why is surface area more important than volume?

When we look at the cortex of the brain, it has a folded structure. It is said that this is because this enables a greater number of neurons to exist, which is obviously advantageous. However, we ...
8
votes
3answers
3k views

What keeps the cerebrospinal fluid circulating? Is it pumped by something?

What keeps the cerebrospinal fluid circulating? Is it pumped by something? This picture from wikipedia seems to indicate that it pulsates as though it is pumped:
2
votes
1answer
376 views

What are higher-level and lower-level brain functions?

The human brain can be described as a "Russian nesting doll" in the sense that the most ancient areas of the brain responsible for lower functions are located at its centre while newer ...
1
vote
0answers
7 views

Is there an upper bound on signals ascending from the sensory nerves through the medulla?

I'm starting to go down a research path related to haptic and embodied cognition. Though I haven't taken a deep dive into neuroanatomy (only a 300 level undergrad cognitive neuroscience course's worth ...
0
votes
1answer
41 views

What is the scope of the study of Neuroanatomy?

I am now trying to understand the scope of the study of neuroanatomy as the discussion in meta surrounding the question Dorsum sellae, tuberculum sellae and sella turcica which of the 3 is referred to ...
3
votes
0answers
32 views

What is the medullary bulb transition?

Does "medullary bulb transition" make sense in neuroanatomy internattionally or is it a Brazilian invention and there is no term like that in English? What is then the difference of the &...
1
vote
0answers
11 views

What is the size, volume, dimensions etc. of the central lateral nucleus in the anterior intralaminar thalamus in humans?

I have been searching extensively on the internet and journal articles for the size, volume, dimensions, etc. of the central lateral nucleus in the anterior intralaminar thalamus in humans but have ...
2
votes
1answer
54 views

Can two neurons stimulate each other?

Is it possible that two neurons stimulate each other in an everlasting two neuron circuit?
2
votes
0answers
18 views

What effect does the size of the soma have on firing characteristics?

For example, cells in layer 5 of the neocortex have a larger soma than do other layers. I'm wondering what the functional difference is between smaller and larger soma. On one hand, I can imagine that ...
0
votes
0answers
31 views

How a signal is generated by the brain when we want to move a body [duplicate]

I've read tons of articles about how moving our bodies is going on. BUT I've found some part of topic just IGNORED. ALL authors just pass the part "our brain generates the signal". I have been trying ...
0
votes
1answer
46 views

Consistent neuroanatomy coordinates naming

I'm studying brain anatomy but I find coordinates systems are not consistent among books, lecture notes and internet. There are 3 plane directions horizontal coronal sagittal And 6 directions ...
2
votes
0answers
104 views

What are the names of the white matter tracts in the cortico-ventral basal ganglia circuit?

I am looking at diffusion tensor imaging (DTI) data. The data are clustered by regions of interest (ROIs). The clusters have locations with names, which I have listed below. Which location names ...
0
votes
0answers
20 views

Functional neuronal units that occupy the same brain region

[Thanks to Bryan Krause's advice, I edited the question.] Definition: Let two functional units be two sets of neurons, A and B, such that the probability of being connected (synaptically or by ...
0
votes
1answer
34 views

Principles of grouping neurons

This is an overview question. I wonder which principles of grouping neurons into higher units are there, and which principles I have overseen. neurotransmitter systems: all neurons that release or ...
5
votes
2answers
401 views

Can two neurons in the brain be connected more than once?

Can two given neurons in the human brain can be directly connected more than once, either mutually or in the same or direction? Also, can the same neuron have transitive connections to itself (in ...
5
votes
1answer
90 views

How many different synapses can an axon form? How do they differ?

It is estimated that the in the human brain there are about 100 billion neurons. With thousands of synapses for each of them, the total number of synapses is over 100 trillion. Yet each neuron has ...
2
votes
1answer
26 views

Is the approximation of the Medial Frontal Gyrus in the region of the Dorsolateral Prefrontal Cortex?

I'm wondering if the MFG is located in the region considered the DLPFC?
1
vote
1answer
449 views

Meaning of "projection" and "to project" in neuroscience

What is the exact meaning of the term projection and the verb to project in neuroscience? I haven't found any neuroscience reference book or dictionary that gives a definition, although those terms ...
1
vote
0answers
66 views

Decussation of Cranial Nerves

Which cranial nerves decussate apart from the few nerve fibers of the optic nerve that do and how to easilly remember the cranial nerves that do? Here is a paper for the Trochlear Nerve But I have ...
4
votes
2answers
137 views

Are brain sub-divisions based off embryonic development used when describing mature brains?

Are the terms for brain divisions based off of embryonic development (e.g. prosencephalon, diencephalon) used for mature brain divisions? (e.g. forebrain, interbrain). For example, would it be wrong ...
7
votes
0answers
210 views

Supplementary Motor Area or Juxtapositional Lobule Cortex

Harvard-Oxford Cortical Structural Atlas now calls the 'Supplementary Motor Area' the 'Juxtapositional Lobule Cortex (formerly Supplementary Motor Cortex)'. I've looked for papers that explain the ...
1
vote
1answer
48 views

Cingulate cortex vs Limbic lobe are they same or slightly different?

I've read the wikipedia article on Cingulate cortex and the article about limbic lobe. Also did web search but it is not clear to me whether they are synonymous or there are slight differences in the ...
3
votes
1answer
98 views

Myelin and Myelin Sheath

https://medlineplus.gov/ency/article/002261.htm Why is Myelin used as a term to mean the Myelin Sheath as opposed to the proper term? It is apparent to me that Myelin is the substance itself ...
3
votes
1answer
33 views

How synapses are hold in place if they're not phisically attached?

When two neurons connect to form a synapse, between the pre-synaptic and post-synaptic cells some space is found (synaptic cleft). How does this keep in position if there is no physical connection ...
2
votes
0answers
21 views

Upside down, backwards writing [closed]

I am an older adult, who entered college late in life. I came to find out that I have both Dyscalculia, and Dyslexia (formally diagnosed) through great difficulty in college. Not realizing that I had ...
1
vote
0answers
20 views

What happens to the brains that are utilized during studies afterwards?

The procedures may vary from country to country, but I'm wondering if they are cremated or otherwise disintegrated.
5
votes
2answers
4k views

How many synapses in the average human brain?

Knowing there are 100,000,000,000 neurons in an average human brain, and 7,000 dendrites in each neuron, and neurons are connected to each other by dendrites and axon terminals, how many synapses are ...
1
vote
0answers
17 views

Using neuroscience to study a new organism [closed]

Consider a situation where you discover a new species and of organism. Using research methods of neuroscience or otherwise, how would you go about analyzing the nervous system and the brain of this ...
3
votes
1answer
2k views

What's the difference between the neuroendocrine system vs endocrine system?

No one in the Biology site seems to be answering this, so I thought I'd post it here as a last resort. I would really appreciate if you guys can take a look at it. This is what I have understood so ...
1
vote
1answer
38 views

How are ocular dominance columns monocular despite binocular complex cells?

Orientation columns in the primary visual cortex are known to have (mostly) simple cells in layers 4 and 6, and (mostly) complex cells in layers 2,3 and 5. Orientation columns spanning an entire range ...
1
vote
1answer
327 views

Unilateral vision in split brain subjects

I am just beginning to learn psychology and came across concept of split brain. I was wondering if a person has only left eye working and has their corpus callosum cut, would they be effectively blind ...
1
vote
1answer
134 views

Is there a region of the brain that mediates pain in a manner reminiscent of the mesolimbic pathway?

The mesolimbic dopamine pathway is a common neural pathway upon which rewards converge AKA the pleasure pathway. So I am trying to find a comparable pathway in the brain for pain -- is there such a ...
5
votes
1answer
41 views

What introductory textbook is available about the corticostriatal brain circuitry?

I want to understand the basal ganglia better. In particular, I want to understand the role of the corticostriatal brain circuitry for non-motor functions, including emotion and cognition. I have ...
5
votes
1answer
363 views

Are the language and sound centres of the brain in the same area?

I am an English major currently taking a Psycholinguistics module. One of the things we learned is that speech perception is handled differently from non-speech sound perception. Our brain is trained ...
2
votes
0answers
76 views

Are cognitive functions strictly divided in the left and right hemispheres? [duplicate]

I often see this kind of picture, claiming the strict lateralization of brain functions. Is this valid? Then, what happens to left-handed individuals? Are their cognitive functions also switched ...
3
votes
0answers
128 views

To what extent is face-detection achieved in peripheral vision?

I'm trying to find out to what extent mere detection of faces (i.e. determining that something is a face, as opposed to recognition of specific individuals) is favored in the central vision vs ...
2
votes
1answer
56 views

Books on Neurological functions?

Are there any books anyone can recommend that do not have any or much in the way of prerequisites but go through the anatomy of the central nervous system while laying out in detail the functions of ...
1
vote
0answers
42 views

Neurogensis in CNS invloves apoptosis of scar cells?

Say there's neurogensis in a brain area that seems to "allow" it, like the Hipocampus, Striatum, and so forth. Does this neurogensis might be preceded in the apoptosis of scar cells, and then, in the ...
2
votes
1answer
338 views

Calculating brain-part volume percentage?

How is the approximate volume occupied by a brain component calculated? For example, how would you know the approximate brain volume percentage of both hippocampi or both parts of the striatum, or ...
4
votes
1answer
399 views

What does 'Mean Diffusivity' tell me about the connectivity of cortical areas?

I am reading an article about changes in thalamic volume and connections in relation to age and I understand that thalamic volume decreases with age. The authors find that mean diffusivity (MD) in ...
1
vote
0answers
78 views

Hypothetical working and function of grandmother cells [closed]

I wonder, if the following model of the working and function of hypothetical grandmother cells is worthy of consideration or not (or if it is even a common view, just differently stated). I assume ...