Manual asymmetry and handedness.
Volumetric measurements show that right-handed individuals have larger right hands than left hands. In contrast, the hands of left-handers are much more nearly symmetrical. Based on what is known about trophic interactions between neurons and targets, these findings predict a corresponding asymmetry of the relevant parts of the sensorimotor system in right-handers. The lack of an opposite-hand asymmetry among left-handers further implies that right- and left-handed phenotypes do not arise according to the same developmental rules.
Purves
D
D
Duke University Medical Center, Department of Neurobiology, Durham, NC 27710.
White
L E
LE
Andrews
T J
TJ
D000328:Adult; D005260:Female; D007839:Functional Laterality; D006225:Hand / Q000033:anatomy & histology* / Q000294:innervation; D006801:Humans; D008297:Male; D010641:Phenotype