Research Topics
| R S JohanssonSummaryCountry: Sweden Publications
|
Detail Information
Publications
Control strategies in object manipulation tasksJ Randall Flanagan
Department of Psychology, Centre for Neuroscience Studies, Queen's University, Kingston, ON, K7L 3N6, Canada
Curr Opin Neurobiol 16:650-9. 2006..Successful manipulation requires the ability both to predict the motor commands required to grasp, lift, and move objects and to predict the sensory events that arise as a consequence of these commands...- First spikes in ensembles of human tactile afferents code complex spatial fingertip eventsRoland S Johansson
Department of Integrative Medical Biology, Physiology Section, Umea University, SE 901 87 Umea, Sweden
Nat Neurosci 7:170-7. 2004.... 
How a lateralized brain supports symmetrical bimanual tasksRoland S Johansson
Department of Integrative Medical Biology, Physiology Section, Umea University, Umea, Sweden
PLoS Biol 4:e158. 2006..Finally, flexible role assignment of the hands is manifest at multiple levels of the motor system, from cortical regions all the way down to particular muscles...- Dynamic use of tactile afferent signals in control of dexterous manipulationRoland S Johansson
Department of Integrative Medical Biology, Umea University, Sweden
Adv Exp Med Biol 508:397-410. 2002..The present account deals with the tactile afferent signals from the digits during manipulation and focuses on some specific issues that the neural controller has to deal with to make use of tactile information... 
Coding and use of tactile signals from the fingertips in object manipulation tasksRoland S Johansson
Physiology Section, Department of Integrative Medical Biology, Umea University, SE 901 87 Umea, Sweden
Nat Rev Neurosci 10:345-59. 2009..Analysis of signals in tactile afferent neurons and central processes in humans reveals how contact events are encoded and used to monitor and update task performance...- Eye-hand coordination in object manipulationR S Johansson
Department of Integrative Medical Biology, Section for Physiology, Umea University, S 90187 Umea, Sweden
J Neurosci 21:6917-32. 2001..We further suggest that gaze control contributes to the development and maintenance of sensorimotor correlation matrices that support predictive motor control in manipulation... - Control of grasp stability during pronation and supination movementsR S Johansson
Department of Physiology, Umea University, S 90187 Umea, Sweden
Exp Brain Res 128:20-30. 1999..This information was obtained by somatosensory cues when subjects initially grasped the object with the grip axis vertical, i. e., during minimum tangential torque load... - Visual and tactile information about object-curvature control fingertip forces and grasp kinematics in human dexterous manipulationP Jenmalm
Section for Physiology, Department of Integrative Medical Biology, Umea University, SE 90187 Umea, Sweden
J Neurophysiol 84:2984-97. 2000..This differential use of vision may have a bearing to the two-stream model of human visual processing... - Influence of object shape on responses of human tactile afferents under conditions characteristic of manipulationPer Jenmalm
Department of Integrative Medical Biology, Physiology Section, , SE-90187 Ume, Sweden
Eur J Neurosci 18:164-76. 2003.... - Encoding of direction of fingertip forces by human tactile afferentsI Birznieks
Department of Integrative Medical Biology, Physiology Section, Umea University, SE 901 87 Umea, Sweden
J Neurosci 21:8222-37. 2001..We conclude that tactile afferents from the whole terminal phalanx potentially contribute to the encoding of direction of fingertip forces similar to those that occur when subjects manipulate objects under natural conditions... - Coordination of fingertip forces during human manipulation can emerge from independent neural networks controlling each engaged digitM K Burstedt
Department of Physiology, University of Umea, Sweden
Exp Brain Res 117:67-79. 1997..In the two-subject grasp configuration this synchronization information was based on auditory and visual cues... - Predictions specify reactive control of individual digits in manipulationYukari Ohki
Section of Physiology, Department of Integrative Medical Biology, Umea University, S 901 87 Umea, Sweden
J Neurosci 22:600-10. 2002..Specifically, the automatic reactive responses reflect predictions at the level of individual digits as to the mechanical linkage of items contacted by the fingertips in manipulation... - Engagement of gaze in capturing targets for future sequential manual actionsYasuo Terao
Section for Physiology, Department of Integrative Medical Biology, Umea University, SE 901 87 Umea, Sweden
J Neurophysiol 88:1716-25. 2002.... - Encoding of tooth loads by human periodontal afferents and their role in jaw motor controlM Trulsson
Department of Physiology, Umea University, Sweden
Prog Neurobiol 49:267-84. 1996..A potential role for periodontal afferents in the spatio-intensive control of jaw actions is discussed... - Eye-hand coordination during learning of a novel visuomotor taskUta Sailer
Department of Integrative Medical Biology, , SE-901 87 Ume, Sweden
J Neurosci 25:8833-42. 2005..The established mapping rules are then implemented and refined in the skill acquisition and refinement stages... - Precision grip function after free toe transfer in children with hypoplastic digitsMichael Schenker
Department of Integrative Medical Biology, Section for Physiology, Umea University, Sweden
J Plast Reconstr Aesthet Surg 60:13-23. 2007..Such forces lead to increased grip force requirements on both fingers that may overload transferred digits with limited motor function. The need for optimal alignment of the grip axis during toe-transfer surgery is emphasised... - Zones of bimanual and unimanual preference within human primary sensorimotor cortex during object manipulationAnna Theorin
Department of Integrative Medical Biology, Physiology Section, Umea University, SE 901 87 Umea, Sweden
Neuroimage 36:T2-T15. 2007..Collectively, these results indicate a hemispheric asymmetry for the SMC and that partially different neural populations support the control of bimanual versus unimanual object manipulations... - Precision grip function after hand replantation and digital nerve injuryM Schenker
Department of Integrative Medical Biology, Physiology and Anatomy Sections, Umea University, Umea, Sweden
J Plast Reconstr Aesthet Surg 59:706-16. 2006..This suggests that control strategies developed for the impaired hand can influence the control of the contralateral uninjured hand... - Selection of prime actor in humans during bimanual object manipulationAnna Theorin
Department of Integrative Medical Biology, Physiology Section and Umeå Center for Functional Brain Imaging, Umea University, SE 90187 Umea, Sweden
J Neurosci 30:10448-59. 2010..The representation selected is the one that optimizes performance by relying on the superior capacity of the brain to process spatial congruent, as opposed to noncongruent, mappings between manual actions and desired movement goals... - Evidence for the involvement of the posterior parietal cortex in coordination of fingertip forces for grasp stability in manipulationH Henrik Ehrsson
Department of Woman and Child Health, Karolinska Institutet, SE 17176 Stockholm, Sweden
J Neurophysiol 90:2978-86. 2003..We suggest that this area might represents a node in the network of cortical and subcortical regions that implement anticipatory control of fingertip forces for grasp stability... - Action plans used in action observationJ Randall Flanagan
Department of Psychology and Centre for Neuroscience Studies, Queen s University, Kingston, Ontario K7L 3N6, Canada
Nature 424:769-71. 2003..These results indicate that during action observation subjects implement eye motor programs directed by motor representations of manual actions and thus provide strong evidence for the direct matching hypothesis... - Eye movements when observing predictable and unpredictable actionsGerben Rotman
Department of Psychology and Centre for Neuroscience Studies, Queen's University, Kingston, Ontario K7L 3N6, Canada
J Neurophysiol 96:1358-69. 2006..This in turn suggests that they implement representations of the manual actions required in the task and representations that direct task-specific eye movements... - Orofacial mechanoreceptors in humans: encoding characteristics and responses during natural orofacial behaviorsMats Trulsson
Department of Odontology, Karolinska Institutet, SE 141 04 Huddinge, Sweden
Behav Brain Res 135:27-33. 2002..We conclude, that humans use periodontal afferent signals to control jaw actions associated with intraoral manipulation of food rather than exertion of jaw power actions... - Loads applied tangential to a fingertip during an object restraint task can trigger short-latency as well as long-latency EMG responses in hand musclesVaughan G Macefield
Prince of Wales Medical Research Institute, UNSW, Barker St, Randwick, Sydney, NSW 2031, Australia
Exp Brain Res 152:143-9. 2003.... - Prediction precedes control in motor learningJ Randall Flanagan
Department of Psychology, Centre for Neuroscience Studies, Queen's University, K7L 3N6, Kingston, Ontario, Canada
Curr Biol 13:146-50. 2003..As predicted by several recent theoretical models of sensorimotor control, our results indicate that people can learn to predict the consequences of their actions before they can learn to control their actions... - Incidence of F waves in single human thenar motor unitsChristine K Thomas
The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami School of Medicine, P O Box 016960 R 48, Miami, FL 33101 9844, USA
Muscle Nerve 25:77-82. 2002..These results provide valuable baseline information on F waves that can be used to assess changes in axon conduction, motor unit contractile properties, and motoneuron excitability in disease...