46 Answered Questions for the topic Neuroscience

07/31/19

Why have humans evolved much more quickly than other animals?

Humans have, in a relatively short amount of time, evolved from apes on the African plains to upright brainiacs with nukes, computers, and space travel. Meanwhile, a lion is still a lion and a... more

07/30/19

Why are there no Nissl bodies in the axon?

What could be the significance of not having Nissl bodies (endoplasmic reticulum) in the axon hillock (a part of the cyton) and axon? Does it have something to do with the processing of action... more

07/24/19

Will neurons die if they are inactive for a long time?

We know that when muscles are not used they atrophy. Does something similar also happen in neurons if they do not receive any stimulus?

07/23/19

How do you define "methodological approaches" in neuropsychology/psychology?

For example, in the paper belowFani, N., King, T. Z., Powers, A., Hardy, R. A., Siegle, G. J., Blair, R. J., ... & Bradley, B. (2018). Cognitive and neural facets of dissociation in a... more

07/19/19

Why do neurones use chemical signalling at synaptic junctions?

When a neurone fires, it sends an electrical signal that jumps down the axon via the nodes of Ranvier very rapidly. At a synaptic junction, chemical Brownian diffusion signalling with receptor... more

07/11/19

How is temperature sensed?

Can anyone summarize the mechanism by which when an object of a given temperature is placed in contact with, say, the skin on a human fingertip, the average speed of the particles of the object is... more

07/08/19

Why do the two hemispheres of the brain control the opposite sides of the body?

Why does the left hemisphere control the right and the right hemisphere control the left? I googled it but didn't find a good answer regarding this. Could someone explain? Does this adaptation help... more

07/06/19

Under what circumstances will a human neuron divide?

I read somewhere that a mature neuron loses its ability to divide, except for very specific situations. I was unable to find the description of those situations. What are they?(I'm sorry I'm not... more

07/04/19

What do you see when your eyes are closed?

If you are in pitch black and you close your eyes, you sometimes can see strange shapes of various colors. A lot of the time these shapes and colors change as you observe them. This phenomenon... more

07/03/19

Are there any plants with nervous systems?

I know that plants can send impulses through their "body." However, I was curious if there were any types of plants that had nervous systems? Or something similar? Thank you!

06/27/19

Can parts of a human brain be asleep independently of each other, or vary in the times required for them to fall asleep?

I know that some birds and marine animals can continue complicated activity (swimming, flying?) while one hemisphere of their brain is asleep.I'm interested if human brain has some parts of it that... more

05/27/19

How exactly does marijuana damage brain cells?

I've heard that THC can cause permanent damage to brain cells. I've also heard this reffered to anti drug propaganda. Another theory i've read is that temporary effects reduce intelligence but long... more

05/24/19

What determines whether a substance can diffuse across the blood-brain-barrier?

What determines whether a chemical substance is able to cross the blood-brain-barrier via passive, transmembrane diffusion? What structurally differentiates these chemicals?

05/22/19

Human perception of time depending on age?

From what I can tell and what thus far all people with whom I discussed this subject confirmed is that time appears to "accelerate" as we age.Digging a little, most explanations I found basically... more

05/19/19

Why does getting certain chemicals in cuts hurt?

More specifically, shampoo. What are the mechanics of detecting a noxious chemical stimulus in terms of which receptors recognise what, how do they do it, and how is this information relayed to the... more

05/11/19

Why do antidepressants have a delayed onset of action?

Why do antidepressants take so long to reach efficacy? I've read of theories about it perhaps being due to the strength of negative feedback via serotonergic and adrenergic autoreceptors during the... more

05/10/19

Effects of exercise on the brain?

I am well aware of the phenomenon of neurogenesis induced by exercise, as well as the dopamine release that results from exercise. I am really interested in neuropsychology and the effects of... more

05/05/19

Is the enteric nervous system found only in vertebrates?

The enteric nervous system is distinguished by being autonomous from the central nervous system and capable of independent action, such as the peristaltic reflex. For this reason the the intestines... more

05/03/19

Why do people like to listen to sad songs?

Why do people like to listen to sad songs? Sadness is not a positive feeling, so people should avoid it, right? Listening to sad songs is like inflicting some pain to yourself just for... more

05/02/19

Why are there no Nissl bodies in the axon?

What could be the significance of not having Nissl bodies (endoplasmic reticulum) in the axon hillock (a part of the cyton) and axon? Does it have something to do with the processing of action... more

04/16/19

Why does sympathetic activity constrict pulmonary vessels?

I don't know understand why sympathetic stimulation constricts pulmonary vessels? I thought that the sympathetic nervous system activated the body for physical activity. Physical activity would... more

04/11/19

Human perception of time depending on age?

From what I can tell and what thus far all people with whom I discussed this subject confirmed is that time appears to "accelerate" as we age.Digging a little, most explanations I found basically... more

04/09/19

Is HSV-vector-mediated miRNA expression in dorsal root ganglia stable?

My question is on the following article: "*[Reduction of voltage gated sodium channel protein in DRG by vector mediated miRNA reduces pain in rats with painful diabetic... more

04/05/19

Are thoughts transferred along with a brain during a brain transplantation?

If I'm transplanted with, e.g., Stephen Hawking's brain, would I start to think like him, or would I remain to think like me? On which, "thinking" ability depends , is it the physical structure of... more

04/04/19

How exactly does marijuana damage brain cells?

I've heard that THC can cause permanent damage to brain cells. I've also heard this reffered to anti drug propaganda. Another theory i've read is that temporary effects reduce intelligence but long... more
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