Is there a term/study for our ability to feel a range of weight of objects? For example, if you pick up a brick, you can definitely feel its weight. But if you put a small feather in someone's hand, she couldn't possibly feel any weight. So there is a threshold. What area of study covers this? My search strategies with Google are generating mostly products for weight control. The closest I've found is the somatosensory system, but that's not really what I'm looking for.