United States or Guam ? Vote for the TOP Country of the Week !
The deviation to the left in front of the body only called out the right hand to greater exertion, while the left hand fell into still greater disuse. This seems to show that "dextrality" is not derived from the experience of the individual in using either hand predominantly for reaching, grasping, holding, etc., within the easiest range of that hand.
Hitherto the actual conditions of the rise of "dextrality" in young children as the general fact of uneven-handedness may be called have not been closely observed. It was to gain light, therefore, upon the facts themselves that the experiments described in the following pages were carried out.
In fact, as naturalists have ventured to observe, "dextrality" is a well-known law of nature. In their rotational and orbital movements, stars and their satellites go from right to left. Now then, nature has generally obeyed this law in coiling her shells.
A full discussion would lead us to the conclusion that dextrality is due to a difference in development in the two hemispheres of the brain, that these differences are hereditary, and that they show themselves toward the end of the first year. It is a singular circumstance that right-handedness and speech are controlled by the same hemisphere of the brain and from contiguous areas.
Word Of The Day