What causes us to shudder when we hear a scratching noise?
925263
Like on a chalk board? the high pitch just sounds unnatural. My brother will throw up if he hears high pitched sounds. I always say don't scratch your butt around him, LOL.
787362
I get a shiver and sometimes feel like sneezing...
6317
Read why here:\nhttp://science.howstuffworks.com/question511.htm\n\nThe root of the answer to your question lays in this paragraph from the above page:\n"Brain scientists at the University College London have pinpointed the cerebellum as the part of the brain that prevents us from self-tickling. The cerebellum is the region located at the base of the brain that monitors our movements. It can distinguish expected sensations from unexpected sensations. An expected sensation would be the amount of pressure your fingers apply to your keyboard while typing. An unexpected sensation would be someone sneaking up behind you and tapping you on the shoulder. While the brain discards the sensation of typing, it pays a lot of attention to someone tapping on your shoulder. The difference in reactions from expected to unexpected is a built-in response that probably developed in early human history to detect predators."
295099
dryer sheets, rub them on your hands and things you use often that shock you... door knobs, hair brush, tv
341987
an itch is somewhere in your body that you want to scratch really very much. Itching can be caused due to allergy to certain types of foods, medicine, moquitoes, sunlight or warm weather in general.
1185337
A dog likes to scratch, we know that. \n\nWhen they feel their stomach being scratched (and they're not scratching it) the moving leg is a residual/ghost response..........like they would be doing if they WERE scratching themselves.\n\nWhen someone tickles us or scratches our backs for us we usually have the urge to "help them out"......but it's more like a "leaning into it"  or a retreat response.
81957
I believe it has something to do with your cerebellum being able to detect expected and unexpected sensations. A reasonable explanation can be found here: http://science.howstuffworks.com/question511.htm
480117
I was told in an Anatomy and Physiology class by teacher that scratching an itch interferes with the nerve messages being sent by the itch to the brain. So temporarily you don't feel the itch. Putting ice or tolerable hot water on an itch can help similarly.
610830
the reason our skin itch sometimes is due to the effect of our own body immune system against antigen (foreign body not recognize by our immune system). \nWhen antigen enters our body through skin, it is detected by Langerhans cells beneath our skin and triggers our immune system to release histamine to eradicate the antigen, and the histamine secretion is the reason why our skin feel itch sometime.
124838
I think it could be a mental thing.  I do the same thing.  It's like I have to scratch in so many different places (mind you I actually feel the itch) before I can get comfortable and fall asleep.  It's a possibility?
353382
Most of us have a ticklish spot somewhere on our bodies, and it is usually pretty easy to find. For some it's just above the knee, for others it's the back of the neck, and some of us go into fits of laughter if someone grabs our sides. Laughing when another person tickles you is a natural reaction. Scientists have discovered that the feeling experienced when we are tickled causes us to panic and is a natural defense to little creepy crawlers like spiders and bugs. Slight tickles from insects can send a chill through your body letting you know something is crawling on you. \n\nThat same ticklish feeling sends us into a state of panic and elicits a response of uncontrollable laughter if a person tickles us. It's the moment that you least expect to be tickled and are that causes you to feel extremely uneasy and panicked, which leads to the most intense ticklish feeling. Even if you do know that you are about to be tickled, the fear and unease of someone touching and possibly hurting you causes you to laugh. Some people are so ticklish that they begin laughing even before they are touched.
718367
Itching is worst at night because when the other senses start shutting down, like your eyesight because you close your eyes, and you begin to tune out your hearing and focus more on your internal thoughts, then the sense of touch is amplified many times over. Loose body hairs and hair from your head can disloge and then as you itch the hair the hair is then moved to another part of your body, where you begin to feel like you have another itch at a different location immediately after taking care of the first itch. Or it could be bugs. Thousands of them, crawling all over your body at night.
512467
Because our genetalia, being on the outside of our bodies, shifts and moves about as we go through our day.  Occasionally it will become positioned in such a way that is uncomfortable or painful and must be repositioned.  A gentleman will make the necessary adjustments privately.  As for scratching, bacteria grow in the the sweat of our groins which can cause our skin to itch.  Again, a gentleman will scratch in private.  You will probably notice that most public grabbers and scratchers are younger and have not come to accept that thier behavior is not appealing to others, especially women.
834968
Maybe it is some kind of hallucination.. You may wish to see a psychologist about it. Certain illness might trigger it..
150409
The frequency of the sound stimulates the nervous system causing an involuntary muscular reaction at the base of the neck. This has the effect of causing you to shudder; making your spine tingle; putting your teeth on edge, or a combination of all three.
904650
I wonder what volume you play your music.. may be the factor..Causes considerable irritation to the nerves you mention with your symptoms.. suggesting you are having a problem that us sub acute and the stress of the music takes it into the acute state.
1071109
You get an itch because there is an excess of dry dead skin and you scratching is your body's way of shedding and getting that dead skin off so the new skin can breathe