Light Touch
Light touch (thigmesthesia) is used as a screening test for touch. Both the spinothalamic and DCML systems serve this sensation so it is not specific for either one. A cotton tip applicator or fine hair brush is used. Select areas from different dermatomes and peripheral nerves and compare right versus left.
![](https://i.ytimg.com/vi/x84hkWLmqTI/mqdefault.jpg)