Proprioception is your body's ability to sense itself in the environment in relation to neighboring objects. This is made possible by proprioceptors the proprioceptors are sensors that provide information about joint angle, muscle length, and muscle tension, which is integrated to give information about the position of the limb in space. Tests of proprioception are most common in field sobriety tests. The subject is required to touch his or her nose with their eyes closed. People with normal proprioception may make an error of no more that 20 millimeters, while people who are drunk fail this test because they have difficulty locating their limbs in relation to their noses.
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These proprioceptors have a pretty interesting job! I wonder how exactly the alcohol interacts with the proprioceptors to cause them to misjudge?
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