48 Answered Questions for the topic Neuroscience
Can someone clarify whether the cingulate cortex is part of the limbic lobe (not to be confused with the limbic system)?
To my knowledge, the limbic lobe consists for the cortical component of the limbic system whilst the remainder of the limbic system is composed of the subcortical components. More specifically, can... more
How are the Tegmentum and the Dorsal Medulla the same thing if they're located in different sections of the brain?
I am trying to learn about the brain, I can't currently afford college so I'm teaching myself to the best of my ability and I'm confused about something. So- The Medulla Oblongata is made up of the... more
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
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?
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
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
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
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
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
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!
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
Is it correct that the body only responds to the most painful stimulus?
*I'm rather ashamed to say that this question is partly based on an episode of House.*I have previously heard that, if there are multiple simultaneous painful stimuli, the mind will only feel the... more
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?
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
Does caffeine actually enhance cognition?
I have heard, respectively: - Caffeine measurably enhances cognitive function. - Caffeine does not measurably enhance cognitive function in any significant way. - Caffeine enhances cognitive... more
What limits the maximum spacing of Nodes of Ranvier and which organisms tend to have the widest gaps?
Assuming that a longer distance between gaps in the myelin sheath is beneficial for an organism due to the increased propagation speed, what is the limiting factor in determining the maximum... more
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
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
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
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
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
What is the mechanism responsible for the periodicity of hiccups?
Hiccups ([*singultus*]) are caused by involuntary spasm of the intercostal muscles and diaphragm, producing a sudden inspiration with associated glottic closure. It seems the neurobiology of the... more
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
What's the mechanism for being mentally tired?
I notice that after long tests, or long periods of critical thinking, my body and mind feel noticeably tired. Why does this happen? Are the neurons in my head not firing as quickly, or is there... more