After the ruler is dropped, the eye sends a message to the visual cortex, which perceives that the ruler has fallen. Rather, this activity is designed to measure the response time to something that you see.Ĭatching a dropped ruler begins with the eye watching the ruler in anticipation of it falling. The neural pathway involved in a reaction time experiment involves a series of neural processes. This experiment does not test a simple reflex. The whole process takes between 150 and 220 milliseconds. Your finger muscles move to catch the timer. A nerve signal travels from your eye to your brain then to your finger muscles. When your friend drops the timer in the experiment, you see it start to move. In this activity, the students participate in a simple ruler drop experiment and learn about the body’s response behind it.
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