Chap. XVIII Of Luxations in the Palm
The bones also in the palm are sometimes dislocated, and that either forward, or backward. For they cannot be luxated laterally by reason of the resistance from the parallel bones on each side. There is only one indication of it, which is common to them all: a tumour in that part, to which the bone comes, and a cavity in the other, from which it recedes. But the bone being well pressed by a finger, returns without extension to its place.