Cooperative hand movements

Hand Movements

The human hand and the brain are close partners in two important and closely interconnected functions: exploration of the physical world and reshaping of parts of this world through manipulation. The highly versatile functions of the human hand depend on both its anatomical structure and the neural machinery that supports the hand. This article focuses on the sensorimotor control of hand moveme...

Ballistic Hand Movements

Common movements like reaching, striking, etc. observed during surveillance have highly variable target locations. This puts appearance-based techniques at a disadvantage for modelling and recognizing them. Psychological studies indicate that these actions are ballistic in nature. Their trajectories have simple structures and are determined to a great degree by the starting and ending positions...

Neural coupling of cooperative hand movements after stroke: role of ipsilateral afference

We investigated the role of ipsilateral ascending pathways in the neural coupling underlying cooperative hand movements of stroke subjects. Ipsi- and contralateral somatosensory evoked potentials (SSEP) were recorded following ulnar nerve stimulation during cooperative and non-cooperative hand movements. The amplitude ratio, that is, ipsilateral divided by contralateral amplitude, was highest d...

Task-specific role of ipsilateral pathways: somatosensory evoked potentials during cooperative hand movements.

Task-specific neural coupling during cooperative hand movements has been described in healthy volunteers, manifested by bilateral reflex electromyographic responses in forearm muscles following unilateral ulnar nerve stimulation and by task-specific activation of secondary somatosensory cortical areas (S2) in functional MRI. The aim of this study was to investigate the role of sensory input to ...

Time control of hand movements.