13

Usually, for something to be 'real', we want it in some reasonable manner to be objective or (because that is extremely vague) at least very consistent across subjective observers. Unfortunately, colour does not satisfy this. Physical basis. As explained very well by @Stop_forgetting_my_account: Physics does not have colour, it just has a continuous ...


12

As Ben Brocka mentioned, what you're describing is Habituation, which Wikipedia defines as: Habituation is a decrease in an elicited behavior resulting from the repeated presentation of an eliciting stimulus (a simple form of learning. More specifically, it's technically called Neural adaptation. To quote Wikipedia again: Neural adaptation or sensory ...


10

I think your intuition might be correct. According to Hal Pashler, there is no real evidence for learning styles. The authors do not state that one particular learning style is applicable to everyone. Instead, they conclude that a particular subject may have a preferred learning style. For example, essay writing would have a preferred "verbal" learning style....


9

Association areas are exactly what you are looking for, actually. For example, the ventral intraparietal (VIP) cortex, located in the inferior parietal lobe (along the right border of the yellow area in the image below), just on the border of the occipital lobe, integrates somatosensory (tactile) and visual information. Image via Wikipedia For an ...


9

Bach-y-Rita's Tactile Vision Substitution System (TVSS) project was initiated in 1963 and he has since been regarded as the founding father of sensory substitution. The concept of sensory substitution refers to the process of obtaining information about the world from a functional sensory system (e.g. touch) that would normally be obtained from a lost ...


9

Short Answer Yes. People estimate time differently, by focusing their attention on time in more or lesser degree. Also within a person, time estimation may vary due to stochastic variations. Long answer This is a really nice paper that tries to explain time-perception in a cognitive architecture called ACT-R. It is a model of human cognition that tries ...


8

Much of the answer will depend on how you define multisensory. Are you most interested in areas of the brain where multiple primary sensory streams converge together to form secondary representations, or are you interested in areas of the brain that simply have access to that kind of information? I will throw in for consideration one of my favorite ...


8

On each side of your head, in the middle ear, there is a system of canals in which displacement of a group of hair cells measure the movement along the 3 axes (the canals are tilted a bit back from 90°, so the coordinate system is not identical with that of the head). So, when you move your head around and around as your body "whirls", the cupula of the ...


7

It appears that throughout your question you are touching on multiple questions and topics. I will address them in a series of quotes and responses, beginning with the title: Are colors real? They are not physical things. Colors are a form of perception (an abstraction). They exist in your head. In physics the perception of colors is caused by light ...


7

Jens' answer is pretty much spot on, but misses the fact, remembered from my undergraduate lectures, that your ears actually partially 'turn off' when you speak (or chew), in what's called the stapedius reflex (wikipedia). The most common reference I've seen for this is Møller (2000), which unfortunately is a book, but I'm sure more information could be ...


7

Short answer Yes, continuous exposure to white noise affects neural responses in the auditory system. First, it can alter the tonotopic map in the auditory cortex. Second, it can lead to reduced responsiveness of the auditory thalamus. Background Note: this answer is based on animal experiments using extreme conditions, namely a continuous noise ...


7

Short answer Hair cells in the cochlea can code sound intensity via the amount of neurotransmitter they release. Higher sound levels result in more neurotransmitter release and in turn to higher firing rates in the spiral ganglion cells of the auditory nerve. Background Sound waves are picked up by the mechanoreceptors in the inner ear: the hair cells. ...


7

As far as I know, auditory clicks are the shortest possible auditory stimuli. The shortest auditory click I was able to find in the literature, and which was used in a psychophysical context (i.e., audible to a human) was 10 microseconds (Leshowitz, 1971). The longest sound we can hear is pretty much defined as a human's maximum age I guess. While the ...


6

Furthermore the feelings caused by the "nails on a chalkboard" sound do not at all trigger a fight-or-flight response or put me on edge as a loud noise or something that startles me does. If anything it is almost paralyzing, which seems counter to the evolutionary theory. Yes, I agree, it seems to, however what about the fainting goats? We could have traits ...


6

I will split this answer into two parts - first, about sensory immersion as it is defined and scientifically examined. Second, I will try to address specifically what you asked for regarding the effects of sensory overstimulation and overload. Sensory immersion I don't think your definition of sensory immersion is right when you said it's a "deliberate ...


6

I think this is not a psychological syndrome but just a reflection of the physical procesces. As such it might not be on-topic for this site. Having this said, here is a quick answer. When you hear your own while speaking, the sound source is in a different place than it is, when you hear a recording of your voice through a loudspeaker. In addition, when ...


6

The most well known sensory after effect illusion in the auditory system is probably the Zwicker tone (Zwicker, 1964). If a white noise with a half‐octave‐band suppression placed anywhere from 300 to 7000 Hz is presented at an over‐all sound‐pressure level of about 60 dB for 1 min and then switched off, a decaying, poststimulatory sound similar to a pure ...


6

Objects are visually perceived when they reflect light. A black object does not reflect any light. In other words, no photons are reflected to be detected by the photoreceptors in the retina. A black shape on a colored background appears black because its brightness approaches zero relative to its surroundings. Black, as any other perceived hue, is a ...


6

In terms of the shortest stimuli, the auditory system can process acoustic impulses, but defining the duration of an impulse is problematic. As the duration of the impulse gets shorter, the bandwidth gets broader. A 25 us impulse has frequencies between 0 and 20 kHz, as you decrease the duration of the impulse you add higher frequency components such that a ...


6

You are talking about 3 different phenomena here (emotional numbness, fading consciousness through medical anaesthesia, and silence within anechoic chambers). As your title seems to indicate you are actually asking about emotional numbess, I will base my answer on that. Emotional numbess has been talked about, although not in the same context, in the ...


5

Now I think I have understood your mental model of human perception, I can give you an answer. Correct me if this is not what you meant to ask. If I understood you, you think that the human brain functions like a robotic brain. A sensor captures an image, sends it to the brain (which is comparable to a central processing unit), then the next one, etc. The ...


5

Short answer Muscles are controlled by motor neurons in the spinal cord. The number of motor neurons that fire, as well as their individual firing rates govern the control of muscle force. Background Muscles consist of contractile elements: the muscle fibers. These muscle fibers are under direct control of the motor neurons in the spinal cord (Purves et al.,...


5

Mainly: the choice of variables. Beware that the exponent depends on the choice of parameters; or even worse - relations can change from power-law to linear, logarithmic or exponential, with redefining variables. E.g. you can measure sound volume in either amplitude, energy density (square of the amplitude) or dB (logarithm of the first one). None of it is ...


5

Elliot et al. (2008) define a hallucination as: A sensory experience which occurs in the absence of corresponding external stimulation of the relevant sensory organ, has sufficient sense of reality resemble a veridical perception (i.e. the perception seems to be "real"), over which the subject does not feel direct and voluntary control, and which occurs ...


5

Short answer Sensations are different from thoughts and are separated in the spatial and temporal domain. The distinction between thoughts and perceptions, however, is less well defined, but can still be dealt with experimentally. Background A description of sensation is as follows: The physical process during which our sensory organs [...] respond to ...


5

Short answer Peripheral sensory information is projected unidirectionally to the brain. A sensory strip of the brain contains a topographical representation of the surface of the body that facilitates the localization of peripheral stimuli. Hence, there is no feedback from the brain to the periphery necessary to locate the source of a peripheral stimulus. ...


5

Short answer V1 can be recruited for visual imagery, but it is not strictly needed for imagery to occur, and it is not sufficient in itself to allow for visual imagery. Background Visual imagery is a complex and broad topic of research. It's in fact a big pain in visual prosthetic research. In this area of research it's often nice to show those fancy pics ...


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