Our extensor muscles are the primary muscles of initiating action. If someone calls your name or the phone rings in the other room, we all tend to straighten up a bit and perk up our ears, before even getting up. This network of muscles
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Our extensor muscles are the primary muscles of initiating action. If someone calls your name or the phone rings in the other room, we all tend to straighten up a bit and perk up our ears, before even getting up. This network of muscles
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