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Proprioceptive signals from cutaneous, joint, tendon and muscle receptors create the basis for bodily perception and are known to be essential for motor control. However, which are the mechanisms underlying the proprioceptive signals and which are the variables that affect them is still a matter of debate. In particular, what is worth to investigate is, namely, the codification of proprioceptive information...
Assessing joint position sense for rehabilitation after neurological injury provides a prognostic factor in recovery and long-term functional outcomes. A common method for testing joint position sense involves the active replication of a joint configuration presented via a passive movement. However, recent evidence showed how this sense is mediated by the centrally generated signals of motor command,...
The mechanisms that underlie the control of bimanual actions in which the two hands act separately to manipulate different objects (uncoupled independent control) has been well studied. In contrast, much less is known about how the central nervous system controls bimanual actions that require the two hands act cooperatively to manipulate a single object (dynamically coupled control). Furthermore,...
Proprioception is essential for planning and controlling limb posture and movement. In our recent work, we introduced a standardized robot-aided method for measuring proprioceptive discrimination thresholds at the wrist to obtain reliable and accurate measures of proprioceptive acuity. Weber's law defines discrimination thresholds as a constant ratio between the just noticeable difference and the...
Despite being so similar from a biomechanical perspective, the left and the right arms develop with different dexterity and important functional differences. This asymmetry in motor performance, most commonly known as handedness, has been extensively investigated in numerous research. However, whether such a dominance exists in the proprioceptive system remains unclear. To this end, manual asymmetries...
The coordination of the upper limbs has been shown to be beneficial for post-stroke treatment. In virtual reality based rehabilitation, bimanual exercises can be performed by exploiting haptic rendering techniques that allow object manipulation with two haptic devices. Haptic interaction generally involves spherical end-effectors with invariant shapes. Furthermore, the position of the end-effectors...
Stroke, Parkinson's disease and other neurological conditions often cause proprioceptive deficits which impact the neural control of movement. Proprioception, which is the sense of body awareness, is central to assess accurate interaction with external environment and when compromised it results in several limitations in the activities of daily living. On the other hand, clinical assessment of the...
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