UNLABELLED Changes in both brain structure and neurophysiological function regulating homotopic as well as heterotopic interhemispheric interactions (IHIs) are assumed to be responsible for the bimanual performance deficits in older adults. However, how the structural and functional networks regulating bimanual performance decline in older adults, as well as the interplay between brain structur...

There are several motivations for adapting the concepts of bimanual coordination originating in human motor control to humanoid robotics. Amongst the most important reasons we can highlight are the following: 1) guarantee adequate performance of humanoids in dual-arm tasks; 2) make their movements more effective and natural-looking for humans; and 3) provide the basis for more complex forms of ...

Purpose. Motor freezing, the inability to produce effective movement, is associated with decreasing amplitude, hastening of movement, and poor coordination. We investigated how manipulations of movement amplitude and cadence affect upper extremity (UE) coordination as measured by the phase coordination index (PCI)-only previously measured in gait-and freezing of the upper extremity (FO-UE) in p...

Purpose: The sensorimotor cortex oscillations (frequency ranging between 12 and 15 Hz), commonly known as Sensorimotor Rhythm (SMR) has previously displayed a promising link between the performance of the visuomotor related to skill execution and part of psychology that is adaptive (e.g. the process linked attention which is automatic). This study examined the extent of SMR power in the executi...

In this chapter, we consider a perceptible variable that is related to τ, but is different from τ. The variable is phase, φ. φ is similar to τ in that both are timing variables and both are ratios of spatial variables that could be state variables of a dynamical system. As such, either could be used to drive a damped mass-spring system to yield an autonomous dynamical organization. Finally, bot...

As bimanual robots become increasingly popular, learning and control algorithms must take into account new constraints and challenges imposed by this morphology. Most research on learning bimanual skills has focused on learning coordination between end-effectors, exploiting operational space formulations. However, motion patterns in bimanual scenarios are not exclusive to operational space, als...

1 1 Limitations on coupling of bimanual movements caused by arm dominance: 2 When the muscle homology principle fails 3 Natalia Dounskaia, Keith G. Nogueira, Stephan P. Swinnen, Elizabeth Drummond 1 4 Department of Kinesiology, Arizona State University, Tempe, AZ 85287 5 Harrington Department of Bioengineering, Arizona State University, Tempe, AZ 85287 6 Department of Biomedical Kinesiology, Ka...

Three patients with dominant anterior cerebral artery territory infarction demonstrated a severe disturbance of upper limb motor control with impaired bimanual coordination, the "alien hand" sign, and intermanual conflict, in addition to signs of callosal interruption and a transcortical motor aphasia. Recordings of movement-related potentials in one patient showed an attenuated Bereitschaftspo...

Bimanual movement involves a variety of coordinated functions, ranging from elementary patterns that are performed automatically to complex patterns that require practice to be performed skillfully. The neural dynamics accompanying these coordination patterns are complex and rapid. By means of electro- and magneto-encephalographic approaches, it has been possible to examine these dynamics durin...