Why do some people get chills down their spine when they hear someone scratch a chalkboard?

Question

Theres got to be a scientific reason for this, since my childhood to this day I still get the chills.

Answer 1

It's considered to be a leftover "primitive" reaction from the prehistoric days when we all had fur and went around the jungle on all fours. It's theorized that the screeching sound of the chalk triggers a primordial response in the brain -- it sounds like a wild animal threatening us. You know how when cats are scared or angry, the fur on their backs stands up? Same thing with people. The "chills" going down the spine are actually contractions of the tiny muscles in the skin that would raise our fur up on our backs, if we still had it. That's also why we get goosebumps when we're cold -- or scared. We're trying to fluff our fur up to stay warm, or to appear bigger than we are to intimidate threatening predators.

Answer 2

i be attentive to the way you sense reason whilst i think of of popsicles getting bitten (the ice cream thingy)there's a relax in my backbone and my 2 front suitable tooth sense werid and prefer as quickly as I hear a chalkboard too.

Answer 3

It is your nerves.. I can't stand for anyone to talk real loud or hear certain loud noises or I will scream [ not intentionally]. I have been that way since I was a toddler. I won't say how old I am now.