| Popis: |
Handedness is likely to be controlled by many genetic variants, some of which are in sex-dependent genes that also influence body asymmetry. One such asymmetry may be in foot length. Levy and Levy (Science, 200, 1291- 1292, 1978) reported that right-handed males have longer right feet than left and left-handed males have longer left feet than right, while this trend was found to be reversed in females. Subsequent studies, however, were unable to repli- cate this effect. Here, we consider the relationship between foot asymmetry and asymmetry of hand performance in a sample of 251 children from the Jamaican rural countryside. Foot length was measured and asymmetry was calculated (L- R). An Annett peg test was used to measure speed of hand performance for right and left hands. Lateralised hand perfor- mance (LHP) was calculated by dividing the right-hand time by the left-hand time (i.e. LHP |
