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The authors report a 35-year-old man whose unilateral cerebellar lesion resu lted in marked deficits in coordinating simultaneous cyclic movements of the arm and leg on his ipsilesional side. He exhibited no such deficits when making sim ultaneous movements of the contralesional limbs or when moving paired left and r ight limbs. Thus, the cerebellum,which is already known to underlie within-limb interjoint coordination,also contributes to coordination between limbs.
The authors report a 35-year-old man who unilateral cerebellar lesion resu lted in marked deficits in coordinating simultaneous cyclic movements of the arm and leg on his ipsilesional side. He no no deficits when making sim ultaneous movements of the contralesional limbs when Thus, the cerebellum, which is already known to underlie within-limb interjoint coordination, also contributes to coordination between limbs.