Even through our eyes closed, we have a feeling of body position—where our arms and legs are, for instance, and that we are moving them. Muscles, tendons, joints, and the inner ear contain proprioceptors, likewise recognized as stretch receptors, which relay positional indevelopment to our brains. Our brains then analyze this information and provide us with a sense of body orientation and also movement.

You are watching: When you close your eyes and raise your hand


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Activity 1: Find your fingertipsClose your eyes and raise both hands over your head. Keep the fingers of your left hand also entirely still (no wiggling!). With your right hand, easily touch your index fingerpointer to your nose, then conveniently touch the tip of your thumb of your left hand also through the tip of your right index finger. Quickly repeat the entire procedure while attempting to touch each fingerpointer (constantly go back to your nose in between fingerguideline attempts).Switch hands and also attempt aget.How efficiently did you find each fingertip? Did you boost via time? Was there a distinction once you supplied your right versus your left hand?

Try again, but this time, wiggle the fingers of your increased hand also while you"re doing this.

Activity 2: X marks the spot

Hold a item of paper versus a table peak through one hand also and also organize a pencil in the various other. Mark an X on the paper. Next off, raise your pencil hand also above your head, cshed your eyes, and make a dot on the paper as close to to the Xas feasible. Open your eyes and also examine your success. Raise your hand also over your head, cshed your eyes, and attempt to make a dot closer to the X. Do this a number of times. Finally, repeat with your eyes open.

Activity 3: Handcreating analysis

On a lined sheet of paper, create the word "proprioception". Place your pencil on the exact same line beside the written word, cshed your eyes, and create "proprioception" aget. Is tbelow a difference in the appearance of the two created words?


In all of these activities, you are using proprioceptors in your muscles, tendons, and also joints to judge your body"s place. Because the majority of of us are highly dependent on visual cues for judging distance, position, and so on., proprioception alone is not sufficient to offer us the fine information of position needed to complete these tasks accurately. Wiggling your fingers in the first activity offers extra indevelopment to your brain, which helps you correctly find your fingers in space.You may notification that via recurring trials you can learn to finish the tasks more properly. Visual cues, such as looking at the position of the X between trials, have the right to likewise assist you adjust your activities to finish the task at hand. This is much less applicable to the handwriting activity—a lot of civilization find that vision is not a crucial cue in redeveloping composed words, because we"re provided to the "feel" of creating provided by proprioceptors in our hands and fingers.


This Science Snack is component of a repertoire that highlights Babsence artists, researchers, inventors, and also thinkers whose job-related aids or expands our expertise of the sensations explored in the Snack.

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Source: NASA

Dr. Patricia Cowings (1948- present), pictured above, is a psychophysiologist who trained as an astronaut at NASA, and was an different to go into area in 1979. Interested in humale potential, she researched and arisen individually tailored protocols to proccasion motion sickness in astronauts. Her Autogenic Feedago Training Exercise has been offered widely. Dr. Cowings is the Principal investigator of Psychophysiological Research Laboratories at NASA Ames Research Center.