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Questions tagged [touch]

Tag related to questions on the sense of touch and haptics, including, but not limited to peripheral processes dealing with touch, central processing of touch stimuli in the brain; kinesthetic systems (awareness of movement); and proprioceptive system (muscle spindles including the multisensory processes involving the balance organ). Often, but arguably, even heat and pain reception in the skin are grouped under the sense of touch.

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Golden tortoise beetle changes color when touched

I found this video on the internet in which a golden tortoise beetle changes color when touched and then looks like a ladybug. Why changes the beetle color because the red color is just as noticable ...
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What does C. Elegans sense when touched?

I'm reading up on C. Elegans' touch responses. Once touched, what is it that the neurons are sensing, specifically? Presumably, touch deforms the body cells, and that deformation is sensed by the ...
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What is the smallest touch sensation that a human can feel?

What is smallest touch (pressure) sensation that a normal, healthy person (not hypersensitive nor insensitive) can feel on the palm of the hand?
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Would the human body react faster to touch or sight

I am currently working on an assignment for my physics class, but I believe my question is biology related. For a two person lab, I am trying to time how long it takes a tennis ball to fall two ...
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How do afferent mechanoreceptors work on the finger pads?

I'm having some difficulty understanding how the afferent signals are sensed in the finger pads. My understanding is that for mechanoreceptors, as the indenting force increases, their effective ...
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Why do we only initially feel the bending of a hair?

In my neurobiology class, my professor prompted us to take the tip of our pencil and fold or push down a single strand of hair on our arm or leg in the opposite direction that it grows in. He then ...
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What stimulates a nociceptor?

For instance, when pressure is applied to the skin, what determines how much pressure results in nociceptor stimulation. And when a sharp object pierces the skin, why is pain, rather than simply touch,...
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937 views

How is pain induced by blunt and sharp objects?

Normally, when something touch you, you won't feel pain. With a great force "touching" you, you will feel pain. However, if something that is spiky makes contact with you, you will feel pain. So, how ...
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Is numbness the absence of one or all touch sensations?

I am studying the effects of tetrodotoxin and its symptoms when consumed. Numbness is one of the first sensations reported. But I googled numbness and I couldn't find information about whether this ...
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Do humans have skin cells that trigger oxytocin release in the brain?

I was reading an article by Montgomery on the therapeutic effect of pets (Boston Globe, January 12, 2015), and I found this quote: All animals appear to have cells directly under the skin that ...
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Relationship between nerves and axons

I just wanted to get a realistic viewpoint of our nervous system. I understand arteries and veins, but I wanted to know how similar our nervous system is to that? I understand we have neurons (...
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What could cause no pain but sense of touch?

What could cause a mammal to have and respond to a sense of touch with only isolated numbness but not feel pain?
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spinal cord lesion and result in somatic sensation

Jimbo suffers a lesion to the entire right half of the spinal cord at the T6 level. A few weeks after his injury, his doctor tests his right and left legs for somatic sensation and tone. fill out her ...
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The mechanism of mechanoreception?

I am interested in knowing the molecular mechanism behind mechanoreception/mechanotransduction (i.e. mechanism behind receptor potential generation on mechanical stimulation). I know that most ...
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What exactly is the neural receptive field?

Neural receptive fields map the spatial or temporal distribution of the data to individual neuron excitation, if I understand correctly, but I do not understand if receptive fields (especially in the ...
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Why does it hurt more when you touch a nerve directly?

I am not a biologist nor know much about biology (so please explain in layman's terms) however I have always been curious as to why this is. What causes the difference in pain between touching an ...
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Do taller people have larger somatosensory cortices than short people?

When we assume that peripheral touch receptor densities are equal in tall and short people, then tall people should have more touch receptors than short people, given the larger amount of skin surface ...