Huheey J E
Behav Genet. 1977 Jan;7(1):29-32. doi: 10.1007/BF01067174.
The origin of right-handedness as the predominant chirality in humans seems to be related to the tendency of human (and presumably prehuman) mothers to hold infants on the left side. The latter practice has previously been ascribed to imprinting and the soothing sound of the mother's heartbeat on the infant. Given the practice of holding the child in this manner, dextral mothers will be more skillful at manipulation of objects and selectively favored.
右利手作为人类主要手性的起源似乎与人类（可能还包括前人类）母亲将婴儿抱在左侧的倾向有关。这种做法此前被归因于印记以及母亲心跳对婴儿的安抚作用。鉴于以这种方式抱孩子的习惯，右利手的母亲在操作物体方面会更熟练，并会被选择性地青睐。
