Right-Lefthandedness and Crossed Foot Preference. Testing of Laterality and Cerebellar Dominance


Authors: J. Tichý 1;  J. Běláček 2
Authors‘ workplace: Neurologická klinika 1. LF UK a VFN v Praze 1;  Ústav biofyziky a informatiky 1. LF UK a VFN v Praze 2
Published in: Cesk Slov Neurol N 2008; 71/104(5): 552-558
Category: Original Paper

Overview

Cerebellar dominance in relati on to right and left- handedness was studi ed in 221 he althy scho ol children aged 9– 11 ye ars old. The Edingburgh Questi onnaire, completed jo intly by children and their parents, was used in combinati on with a number of other tests to produce a report comprising 34 items. Fo ot preference for “long jump” (in the ro om), skipping and ball kicking was recorded. These laterality tests were compared with “Henner’s” cerebellar dominance, determined by physi ological relative hypotoni a and enlarged excursibility (pasivity) in the following jo ints: sho ulder - enlarged synkineses on non‑dominant arm during walking, gre ater “jo int play” in elbow, wrist, knee and ankle corresponding to the functi on of non‑dominant cerebellar halves (hemisphere), i.e. left in right- handed people and right in left- handed people. A small gro up of ambidextro us people (n = 42) was more similar to the gro up of 100% right- handed people (n = 166). Gre ater vari ability was fo und in 100% left- handed people (n = 13) than among the right handed. The following tests in the Edingburgh Questi onnaire were fo und to be most reli able in determining of right-  or left- handedness: writing, drawing, holding a knife, scissors, spo on, match- striking and using a key (added by us). The percentage structure of these tests was mutu ally indistinguishable (p < 0.001). Significant correspondence (p < 0.01) was fo und between right- handedness and left- side limb passivity in the elbow, wrist, knee and ankle, and for arm synkinesis (p < 0.02). An interesting finding was a preference for the left fo ot in a half of right- handed people and the right in a half of left- handed people in the long jump, which was not reflected by a change in jo int passivity as described above (p < 0.05). In tests of skipping and kicking a ball the fo ot- preference was highly similar to that for upper limb, i.e. right- handedness; mirror imaging amongst the left- handed was less prono unced.

Key words:
right-lefthandedness – cerebellar dominance – crossed foot preference


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Labels
Paediatric neurology Neurosurgery Neurology
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