What makes our brain signal us to scratch when we think of things (like insects) crawling on us?

Answer 1

those fears are learned. Small children aren't afraid of snakes and scorpions. they try to touch them if you put one close to them.

Therefore, it's only because we learn to fear that our brain scratches when we think of insects.

As a matter of interest, I remember I quite liked the feel of ants on my skin, when I was a little boy. But now I'm grown up, I developped a paralizing fear of any kind of flying insects that has slowly leaked towards all kind of insects.

Answer 2

its probably reflex. when someone has never been bitten by an insect or known someone bitten, one might not be inclined to scratch. but when the pain is recalled, the person tries to aviod the pain again by removing the source of the pain.
hope i answered your question well.
au reviour

Answer 3

Our skin has nerves censors, that transmit to the brain to scratch in response to remove insects if there is.

Answer 4

When a part of the body has an itch or when we think of it, sensory impulses travel from that part via a peripheral nerve, to spinal cord ,through sensory tracts in spinal cord, to sensory part of cerebral cortex on opposite side for recognition. Cerebral cortex gives orders to motor cortex ,to motor pathways to motor fibers of spinal cord, to limbs on opposite side, through motor nerves to scratch. Cerebellum co ordinates.

Answer 5

mm... the paccini, ruffini, krausse or meissner

those are kinds of sense nerves