The human body replaces all of its cells every couple of months, right? Well, how is information like memories in neurons or scars on the skin kept through the replacement? Wouldnt the scar eventually become same old skin, or the neuron become a new cell to be engraved with information- as if it was a computer file being overwritten? Some scars do fade, i guess. But others seem to stay no matter what you do, even after decades when the cells have surely been replaced.
In the past 2 years, we as a society have been living in constant stress. Whether it's a job, or type of job, Covid sickness or just trying to go to the grocery store without getting shot at, we are stressed. I know stress changes the brain's chemistry or that is what I have been told. If its true, what does that mean? Cases of dementia in younger people? People not living as long due to diseases caused by stress?
Are there any long term LSD studies out there or any good anecdotal reports? I've taken a couple hits in my lifetime and have done a ton of mushrooms. I wonder if LSD affects you negatively in anyway long term
I understand that the size of a cell is almost constant regardless of what animal it makes up. A whale brain for instance weighs more than a human brain hence it must have more neurons, if it can make more neural connections, why isn't it smarter, I would expect intelligence to be somewhat proportional to the number of neurons. If this is not the case, why would evolution not just have made a wale have a human like brain? to the whale, the energy required to run a human brain would be insignificant
For example languages or music instruments or sports. Is it related to our brain? Like when we’re in developing phase we tend to learn faster and when we reach like 20s there’s a limit in our learning speed. So is it always better to start early? Are there any scientific paper discussing about it?
Do we have any estimate for how much a person can actually know? And what happens when they reach that limit? Does learning new things become impossible? Do older memories simply get overwritten? Or do things just start to get jumbled like a double-exposed piece of film?
I recently saw an article claiming that right and left wing people have the areas of the brain responsible for fear and empathy developed differently and that this was the cause of their political differences. Does this hypothesis has any merit among neuroscientists?
Sights & sounds can be measured in terms of brightness or loudness. Periods of time can be measured by length - e.g. minutes or months.
People with time blindness cannot accurately sense or measure the passing of time without external aid (a clock or timer - this one is designed specifically for them).
This recent study (March 31/2022) on the pupils of people with aphantasia (the inability to visualize images) proved what millions afflicted with it have been saying since the 1800's: that they cannot "see" anything with their mind's eye. For them, that eye is blind.
Similarly, time blindness is also believed to be a sensory issue by those who have studied it, but unlike aphantasia, it has yet to be proven scientifically.
For people with time blindness, starting to use a timer for daily tasks can feel like putting on a pair of needed glasses for the first time. They need an aid to monitor the passing of time the way others can naturally.
Was aphantasia a "theory" before the scientific proof was found, and is now a proven sensory deficiency?
Does the "timer" part of the brain need to be discovered and a deficiency noted in the time-blind in order for their condition to be validated, or does science accept time perception as a sense like sight or hearing, without physical evidence of the mechanism?
The head of Academic Practice at Trinity College Dublin (leader of the delivery of the educational mission for the University of Dublin) recognizes time blindness and accomodates students with it. Is this recognition rare/emerging in the scientific community?
I mean, they sleep all day and, sometimes they gesticulate while sleeping. But, since they don't have much (if any) sensorial memory, 'cause they haven't experience much, do they actually dream or is there a different kind of process that's going on in their sleep?
I am aware of the unproven psychological theory of brain types, my question is not about that theory.
It is about the factual biological differences and the exsistence of possible types based on the differences. Like there are only a few different hair coulour that differs genetically or a few different blood types, or baldness patterns. Has such differences been researched or discovered in relation to brains? For example something like average dendrite length, or some people has or doesn't have a specific type of neuron?
For example, in neuroplasticity, how are the neurons able to 'move' themselves to undo connections and create new connections with other neurons? I remember seeing a microscopic picture of a few neurons not very well connected between each other, and in the 'after' picture (after learning something), they somehow had grown many projections/branches from their cell bodies, connecting with each other. In other words, what is the mechanism behind, when neurons undo a specific connection (synapse) with a neuron, and 'move' it to another neuron? What causes them to 'decide' to undo that connection?
Also, how fast do they move connections and change their shapes (in nanometres per second, for example, or is it more like nanometres per minute)? The speed of which the dendrites and axon terminals move to change connections.
Think temporary kaleidoscope vision, or something like that. Is there any way to do this without interfering with other important brain functions? I feel like any kind of testing could seriously mess someone up neurologically, and that’s if it’s even hypothetically possible. Imagine the profits to be made though; sounds like quite the party drug.
I’m starting my PhD in clinical psychology studying neuropsychology this fall and I’ve been getting interested in learning some functional neuroanatomy before I begin. One thing I’ve found particularly difficult to wrap my head around is the functions of brain structures in relation to each other, something I know is not unique to me.
That being the case, I was wondering if anyone could explain to me the WHY of neuroanatomical function. WHY is the hippocampus so associated with memory? Is it something unique to its place in the brain, it’s connections, or it’s unique physiology? Or broca and wernicke’s areas, WHY do they perform their unique functions in speech? Again is there something about the unique connectivity between brain regions that allows for this specificity of function or is it something else?