Where can I find information on how we feel pain? How we know our muscles are moving?

I need Information on how nerves work.



That is how we move our Muscles. Bones.



If I am typing this for example what is happening inside the body to allow me to do it.



This is for a course on Biomechanics any info please.



No silly answers as this is a serious question.Where can I find information on how we feel pain? How we know our muscles are moving?Proprioception



It is the sense that indicates whether the body is moving with required effort, as well as where the various parts of the body are located in relation to each other. Extract from Wikipedia.



This is how we know our muscles are moving, from tiny nerve signals received back from the muscles as they are stretched and tensed. If you lift your arm that requires the muscles in your shoulders to tense and stretch, hence this information is relayed back to the brain and your body knows what it is doing. Hence you can touch your fingers together with your eyes closed, as your brain knows where your hands are.



We get feedback all the time from our nerves. However too much nervous stimulation is often considered pain. For example, if something pressed against your skin you will feel it as a touch. If something presses against your skin with a lot of force in small area (a prick) then the nerves are highly stimulated (more than normal) in a small area and you feel pain and discomfort. It is still just a touch. In addition, what is a touch to one person may be a painful prick to another.



Too much stimulation of a nerve, by whatever method ( hot, cold, pressure, injury, disease) may be considered "pain".



Our nerves are electrical, sending tiny electrical signals to our muscles (and back to the brain). The muscle cells contract when they receive a signal. If you ever get an electric shock, you may find your hands clench. How are peoples hearts started after a heart attack? 鈥ith electric shocks.



Note too that muscle fibres contract with an electrical signal. All your muscles all over your body can only contract (pull). Your muscles are not capable of pushing. If you study the skeleton, you will notice that muscles are often arranged in opposing sets. For example, your biceps will pull and lift your arm up; your triceps will pull and extend your arm. Both muscles work against each other to move the arm as it pivots on your elbow, but remember neither muscle can push.



A big subject - but a few things to get you started.Where can I find information on how we feel pain? How we know our muscles are moving?http://www.amazon.co.uk/Nervous-System-A鈥?/a>