The study of the structure and function of the nervous system and its components.
-1
votes
0answers
16 views
How does the form of a neuron cell change when it dies?
The question is meant for all of the cases when there is apoptosis, necrosis, or freezing.
1
vote
0answers
11 views
Once neurotransmitters bind to its receptors, how does the post synaptic neuron “know” when to start a new action potential?
My textbook seems to gloss over this subject. Once the post-synaptic receptors are activated, do they cause particular ion channels to open, letting positive charge into the cell and inching the ...
-1
votes
1answer
14 views
What happens in a brain of a person suffering with apathy?
Could you describe what happens in the brain (on the level
of neuroreceptors) of a person suffering with a lack of
motivation (or apathy)? And how does it look in the healthy
brain?
2
votes
2answers
34 views
What is Modulation Power Spectrum?
I'm reading this paper https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4562283/ , but I cannot make sense of what MPS nor how should I read the pictures that make use of this method.
The authors say
...
-2
votes
0answers
18 views
Can we really command insects using low frequency? [on hold]
Atleast left or right turn? I'm not talking about full control like antman but you know at least a little?
-1
votes
1answer
30 views
Abrupt movements of birds and reptiles vs. smooth movements of mammals
How can it be explained (in evolutionary and/or neuronal terms), that the spontaneous movements of birds and reptiles are seemingly "abrupt" and not so "smooth": Their spontaneous movements seem to ...
0
votes
1answer
52 views
Can a genetic male be born with the brain pre-wiring normally found in the female of the same species in normal conditions?
At birth in all species I believe there is some pre-wiring. They are not entirely 'blank slates'.
Some species' behaviour from birth, without learning, differs (sometimes significantly) between males ...
5
votes
0answers
46 views
Can cognitive functioning of the human brain change the physical state of the brain?
Can cognitive functioning of the human brain change the physical state of the brain? E.g. does self-awareness, self-reflection change the number of neurons or synapses among neurons? I.e. I am trying ...
2
votes
1answer
12 views
Flow diversion for cerebral aneurysms or stabilizing the hemodynamics?
I'm doing research of flow diverter for cerebral aneurysms applications and I'm wondering the reason behind stent placement underneath of cerebral aneurysms is to divert the flow or stabilize the ...
22
votes
3answers
8k views
Do oysters feel pain?
Do oysters feel pain when you bite into the inside, or when you crack open the shell? I tried google searching it to no avail. When you bite inside the oyster or when you break the shell to open the ...
2
votes
0answers
15 views
What is the signal that indicates which neurons Schwann cells should myelinate versus which should remain unmyelinated?
Schwann cells are neuroglial cells that produce myelin in the peripheral nervous system.
However, not all axons are myelinated - some will remain unmyelinated.
There must be some signal that ...
1
vote
2answers
13 views
How to determine if the amount of manganese chloride will change neural resting potential
If I am treating an organism in MnCl2 dissolved in water, how do I determine if the amount of Cl (in MnCl2) will change the neural resting potential Oor if it will influence motoneurons?
1
vote
0answers
12 views
VC06 neuron of c.elegans
My understanding was that all neurons and their synapses of worm c.elegans are already listed.
As source of this map I'm using following databases (both should contain same information):
...
4
votes
1answer
58 views
Why are the hormones dopamine, adrenaline, noradrenaline and serotonin so ubiquitous across the animal kingdom?
As far as I know there is no reason for the makeup of a given hormone to be universal as it merely serves as a carrier from one part of the brain to another. So why are the above hormones seen across ...
1
vote
1answer
26 views
loops in neuron synapses
If we see at the connectome of c.elegans, it is easy to find "loops", in the simplest case, a neuron that synapses to another and this one backward to the first.
By example, neuron RIAR has 13 ...
2
votes
1answer
32 views
Why there is no neurovascular drug-eluting stent?
I'm researching on neurovascular stents and I'm wondering why there is not much about drug-eluting neurovascular flow diverters in the literature? I read in an article that it's because of complex ...
1
vote
1answer
23 views
What is the mechanism behind the F-Wave?
Can someone explain the actual mechanism behind the F-wave? Is it really different from a H-reflex response or does it just have another name for historical reasons?
The H-reflex (Hoffmann's reflex) ...
4
votes
1answer
74 views
How exactly does sensory substitution work?
Sensory substitution, when one of sensory modality changes into another sensory modality to help someone restore the ability to perceive defective sensory using a working sensory modality. For example,...
2
votes
1answer
50 views
Volley theory and sound amplitude/power
Assume a pure tone (single frequency) is listen, lets say 2 kHz. If I understand correctly the temporal theory (aka timing theory), in a cochlea neuron the action potentials create a signal that will ...
5
votes
2answers
370 views
Neuron connectivity- how are they connected physically
If Neurons are only connected through synapse and there is no physical connection, how are they just suspended in brain layers?
29
votes
3answers
5k views
Can one see flickering of a light bulb at 50 Hz?
Yesterday I had a BBQ with some friends. The sun had already set and the only light source left (besides some ambient light from the world around) was a low energy light bulb.
After a while I started ...
2
votes
1answer
25 views
What is the signal conversion from hair cells to cochlear nerve cells?
If I understood correctly, inner hair cells generates a graded potential (receptor potential), this potential maps the stereocilia deflection. On the other hand, the cochlear nerve cells transmit ...
1
vote
1answer
50 views
Are there humans which the brain sends signals to the limbs faster than the average?
I have done some researches on the time taken by the brain to send signals, but I didn't find whether that time is the same amongst all humans or there are some differences, and I have based my ...
2
votes
1answer
30 views
İrreversible dopamine antagonist vs. Dopamine agonist
Can a dopamine agonist reverse the effects of an irreversible dopamine antagonist?
2
votes
1answer
31 views
Is every neurotransmitter receptor an ion channel?
This is a rudimentary question--perhaps the answer is well known to biologists, but is every neurotransmitter receptor also an ion channel?
For example, NMDAR is a glutamate receptor and cation ...
2
votes
0answers
37 views
Why do new atypical antipsychotics like Zyprexa cause TD at lower rates?
When the d2 receptors are blocked for long periods of time they tend to up regulate. This is what causes tardive dyskinesia.
Why do the newer atypical anti psychotics cause such at a lower rate? ...
-1
votes
1answer
34 views
Neuroscience - A neuron with two types of synapses (electrical and chemical) at the same time
I learn that the nerves from the Peripheral Nervous System can carry signals from and to other organs of the body.
I'm wondering if A Single Nerve carries
1) Only chemical signals
2) Only physical ...
1
vote
2answers
59 views
Ambiguity about the relation between membrane potential and concentration gradient in neuron cells
I am stuck in an ambiguity about the equilibrium potentials of neuron cells. The following text is picked up from khanacademy website:
In one part it is said that:
We'll start out with K at a higher ...
1
vote
1answer
45 views
What is an “Alternative Sensation”?
As far as I know, alternative sensation it's a sensation to distract people from the original stimuli, for example when you have to get an injection, the nurse will pinch you in the other arms so your ...
0
votes
0answers
41 views
What causes dreams to happen?
I've heard that dreams can be influenced by what happens in our daily lives.
There are many theories about why we dream, but no one knows for sure. Some researchers say dreams have no purpose or ...
4
votes
1answer
61 views
What exactly does Curare do to the peripheral nervous system?
so, I was told:
If you give them the right dosage it'll wear off within an hour or two.
It was used for veterinary stuff until they tried it on a human and realized it only paralyzed you and didn'...
1
vote
1answer
38 views
Is it possible to directly uploaded controlled imagery into a person's conscience?
I was wondering, is it possible to use electrical charges and/or EM waves to induce imagery directly into a person's mind?
I got this idea because since almost everybody dreams, and dreams are ...
1
vote
0answers
35 views
is it possible to use electroshock to temporary stop gross motor functions directly on the neural pathway?
Is it possible to modify that procedure and use it to send a small electroshock on the specific neural pathway and temporarily stop that gross motor function?
When the microphone detects unwanted ...
1
vote
1answer
34 views
Results of self-administration study about pain in honeybees?
There research on nih.gov about ability of bees feel pain. But I can't understand their conclusion. Could you provide necessary excerpts here from those study so it would be clear what conclusion they'...
-2
votes
1answer
28 views
Can we send signals to nerve?
I want to know two things.
Can we send a signal to a nerve using external source like electricity?
Can we differentiate signals sent from receptors like pain receptors, pressure receptors etc.
0
votes
0answers
13 views
Cytoarchitecture v.s. Myeloarchitecture
My understanding is that cytoarchitecture refers to the cellular composition of tissues of the nervous system (here I’m wondering which tissues we are exactly talking about), while myeloarchitecture ...
2
votes
0answers
56 views
Book recommendation for studying biology for neuroscience [closed]
I will be starting a double degree in neuroscience and mathematics very soon, and I realised that an understanding of human biology can really help me out, and so I'm looking for an introductory level ...
4
votes
1answer
43 views
How do you check how many cones you have in your eye?
Following my previous question: What color does the other cone in Tetrachromacy correspond to?
People with normal color vision posses 3 cones in their eye. But there are some rare cases when people ...
0
votes
0answers
17 views
Does only one interneuron or upper neuron innervate all lower motor neurons in a muscle?
After reading Kandel I am unclear on this point. I understand that the cell bodies of somatic lower motor neurons cluster in motor nuclei (motor pools) in the ventral horn of gray matter in the spinal ...
-1
votes
1answer
54 views
Why didn't people taking up the Ice Bucket Challenge die?
I recently came across Vagal Inhibition. That article says,
(5) Sudden immersion of body in cold water.
can cause vagal inhibition and ultimately death.
Recalling the Ice Bucket Challenge. Going ...
0
votes
0answers
23 views
Sound volume drop when falling asleep in an airplane
Note: This question has nothing to do with pressure change.
When I'm flying in an aircraft at cruising altitude, the monotonous sound often lulls me to sleep. I've noticed that just as I am on the ...
5
votes
2answers
112 views
Melatonin production, sleep, and “cyan light”; how might this finding be possible?
The BBC News article Cyan colour hidden ingredient in sleep describes research that suggests melatonin levels as measured in saliva could be affected by the presence or absence of cyan color in a ...
1
vote
1answer
22 views
What are reciprocal inhibitory synapses?
Quoting Kandel's Principles of Neural Science, 2013,
Amacrine cells generally receive excitatory signals from bipolar cells at glutamatergic synapses. Some amacrine cells feed back directly to the ...
1
vote
0answers
21 views
Camera and the eye (filtering information)
How does a camera recreate a very similar perceptual stimulus (through the photo) for us to see compared to the person directly viewing the object of interest with their eye?
My questions stems from ...
0
votes
0answers
24 views
Are saturated fats beneficals for the brain's functions?
Are saturated fats beneficals for the brain's functions?
if so, which kind of saturated fats?
I found this information about medium-chain triglycerides (found in coconut oil), 1)it is smaller than ...
2
votes
1answer
21 views
What causes the preliminary changes in resting membrane potential in neurons?
Background: The neuron's membrane resting potential is maintained at a certain voltage. The neuron has a lipid bilayer with certain protein channels which allow the movement of ions in both directions ...
3
votes
0answers
36 views
How can there not be purpose movement in the fetus until week 18 when a fetus can open its mouth and suck its fingers at week 11?
According to Fetal Movement
According to an overview produced by the Royal College of Physicians
of Edinburgh, purposive movement begins at about 18 weeks, gradually
replacing reflex movements
...
1
vote
1answer
39 views
Lower affinity drugs longer time for pathways to rebound?
Do lower affinity drugs take a longer time for pathways to rebound?
Affinity has to with strength of activating a receptor others options.
Do those with stronger affinities result in more likelihood ...
42
votes
2answers
17k views
Why can't we kill ourselves by holding our breath?
Is it possible to kill yourself by holding your breath?
This question is obviously copied from Quora, but I had heard it as a fact that we cannot kill ourselves by holding our breath and I'm looking ...
1
vote
1answer
165 views
Inverse Agonist vs Neutral Antagonist
Could somebody explain in simplest terms the difference between inverse agonist and neutral antagonist?
Which one is more well natural and less likely to cause pathways to rebound?
Does neutral mean ...
