Thursday, April 5, 2012

Goosebumps


As I was reading up on more of the evolution of certain organs, I came across an interesting historical context for goosebumps. Goosebumps are related to the skin organ that more than likely we have all experienced on occasion, but don't stop to think about it. We get goosebumps typically in very cold weather. Other animals such as porcupine's have a similar response. The individual hairs rise up from the skin as a mechanism for creating insulation. Goosebumps also function in response to fear. In the animal world, goosebumps serve to make the animal look larger in size as a means to potentially scare away enemies.

These two aspects of temperature regulation and fear are the underlying reasons for goosebumps. As time as passed, these motives have disappeared for humans but goosebumps still remain. Humans no longer need temperature regulation because of the advent of clothing as opposed to ancestral times where humans roamed naked. Secondly, humans don't have direct enemies and thus do not need the scare mechanism. Somehow natural selection acted on the skin organ and removed the traits for thick hair but left behind the onset of goosebumps that serve a different function than its original intent.



Source: Top 10 Signs of Evolution in Modern Man. http://listverse.com/2009/01/05/top-10-signs-of-evolution-in-modern-man/

8 comments:

  1. This comment has been removed by the author.

    ReplyDelete
  2. I always thought that goosebumps did still serve as a way to keep us warm, by trapping warm air near the body. But I guess they don't actually perform this function anymore? That's so interesting that we still have goosebumps and other adaptations that don't serve any or the same purpose as when they evolved.
    - Hayley Hemstreet

    ReplyDelete
  3. How are these physiological responses triggered? Perhaps hormonally from adrenaline secretion (in response to fear)?

    ReplyDelete
  4. i think hormones are a definite contributor since it is internally regulated, but by the same token, maybe it is just arbitrary since hormones are influenced by temperature in a lot of ways.

    ReplyDelete
  5. I wonder if the chill you also feel when you get goosebumps is from the increase in surface are of the skin, causing a decrease in body temperature. I know that it was a mechanism for insulation, but I wonder now if the mechanism has adverse affects. Has anyone else experienced this?

    ReplyDelete
  6. It's the pili erector muscles in the skin that are responsible for this, right? We can also see these muscles and reactions in chimpanzees and bonobos, strengthening the argument we are closely related to them. While the temperature regulation theory is very plausible, what about the time when there is no true temperature stimuli to prompt the response. I'm thinking of when someone is scared and "something gives them the goosebumps." Is this also an involuntary reaction to an unknown fear as well as a visible one? What prompts this unconscious reaction when danger isn't obvious?

    ReplyDelete
  7. I've been Controlling my meditation of thought, feeling, presenting a emotion to energize this motion of Feeling called goose bumps or positive vibe that's a energy force of some sort....

    Any one relate to this please Let me know michaelfirkus.gmail.com

    ReplyDelete
  8. Grateful on how DR James miraculously help me on my penis enlargement which i have suffered for so long and since then i have never witness any form of insult from my woman, before now she always says lot of bad words to me, that i am not a full man, but now she is after sex and it has gotten to a point when i am tired as we have sex from 12AM Till 5AM and still asked for more, but i am very happy that after i meant with DR James my life turned around, if you having issues of quick ejaculation, slow erection problem, and cumming on time. all you have to do is to contact DR James and have your issues resolved for ever and have a happy sex life, with your partner or spouse. because today i am a living testimony of DR James wonder cream action. waste no more time and write to him on his email: enlargementherbs@yahoo.com or his what app number:+2349055637784

    ReplyDelete