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Attentional Vs. Intentional Biases In Hand Movements; Hand-Specific Coupling & Bimanual Reaching, Gavin Buckingham, David Carey
Attentional Vs. Intentional Biases In Hand Movements; Hand-Specific Coupling & Bimanual Reaching, Gavin Buckingham, David Carey
Gavin Buckingham
Most of the population is dextral, showing a clear preference for performing the vast majority of tasks with their right hand. Peters (1981) suggested that an asymmetrical bias in attention (toward the right hand in right handers) could account for many manual asymmetries in bimanual task performance, with the left hand unable to perform the attentionally demanding portion of the task. Likewise, Honda (1982) demonstrated preferential monitoring of the dominant hand during a bimanual reaching task. Recent evidence has also shown an intentional (i.e. output related motor attention) bias toward the dominant hand (Bestelmeyer & Carey, 2004), another possible factor …
Reflections On… Phase Shifting Under Different Visual Conditions, Gavin Buckingham, David Carey, Arash Sahraie
Reflections On… Phase Shifting Under Different Visual Conditions, Gavin Buckingham, David Carey, Arash Sahraie
Gavin Buckingham
When two limbs are moved out of time (i.e. opposing muscle activation at each limb) in rhythmic oscillatory movements, there is a tendency at high frequencies for the movements to synchronise in the temporal domain, resulting in bilateral homologous muscle activation known as a ‘phase shift’ (Kelso, 1984). In an effort to determine the degree with which perception influences this phase shifting behaviour (Mechsner et al., 2001), a mirror can be placed between the hands of participants, parallel to their mid-saggital plane such that the reflected hand appeared in the place of the occluded hand. This paradigm can be used …