WALKING TRAJECTORY AND HAND MOVEMENTS IN UNILATERAL LEFT NEGLECT - A VESTIBULAR HYPOTHESIS

This is the first systematic study of walking trajectories in unilater al neglect. Six patients with unilateral left neglect approached and w alked through a doorway, and all six deviated to the right of centre w hen doing so. Four out of six significantly centred their walking traj ectories by making left hand movements while approaching the doorway. The group effect of walking with no hand movements vs walking with han d movements was statistically significant. Age-matched control patient s showed a similar but significant smaller rightward deviation. The re sults are interpreted in terms of recent research in limb activation e ffects on neglect (Robertson and North, Neuropsychologia 30, 553-563, 1992), and also in the light of research showing close anatomical corr espondence between the cortical projections of the vestibular nerve on the one hand, and the hand/arm representational fields of the central sulcus on the other.