The 7th grade is currently studying skin. Today we did a lab on 2 point discrimination. This is the poking lab. Students paired up and bent paperclips so the ends were close together. They then tried seeing if the “pokee” could tell the different between a touch when the tips were 1 mm apart at various body locations (finger, back of hand, back of neck, earlobe, etc.). They tried this with increasing distances until they could tell the difference between 1 tip and 2 tips. Some locations on the body can detect tips that are very close together, others don’t have as many touch sensors and the tips need to be further apart.