Early prediction of long-term tactile object recognition performance after sensorimotor stroke

Abela, Eugenio; Missimer, John; Pastore‐Wapp, Manuela; Krammer, Werner; Wiest, Roland; Weder, Bruno

doi:10.1016/j.cortex.2019.01.018

Cited by 10 publications

(31 citation statements)

References 102 publications

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“…As indicated in Table S1 in Supporting Information, the results of the sensori-motor assessments were consistent with published data regarding age-and gender-matched healthy controls for power and precision grip [19], PSO [20], two point discrimination and TOR [22].…”

Section: Sensori-motor Assessmentsupporting

confidence: 88%

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Sensing form - finger gaiting as key to tactile object exploration - a data glove analysis of a prototypical daily task

Krammer

Missimer

Habegger

et al. 2020

J NeuroEngineering Rehabil

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Background Motor hand skill and associated dexterity is important for meeting the challenges of daily activity and an important resource post-stroke. In this context, the present study investigated the finger movements of right-handed subjects during tactile manipulation of a cuboid, a prototypical task underlying tactile exploration. During one motor act, the thumb and fingers of one hand surround the cuboid in a continuous and regular manner. While the object is moved by the guiding thumb, the opposed supporting fingers are replaced once they reach their joint limits by free fingers, a mechanism termed finger gaiting. Methods For both hands of 22 subjects, we acquired the time series of consecutive manipulations of a cuboid at a frequency of 1 Hz, using a digital data glove consisting of 29 sensors. Using principle component analysis, we decomposed the short action into motor patterns related to successive manipulations of the cuboid. The components purport to represent changing grasp configurations involving the stabilizing fingers and guiding thumb. The temporal features of the components permits testing whether the distinct configurations occur at the frequency of 1 Hz, i.e. within the time window of 1 s, and, thus, taxonomic classification of the manipulation as finger gaiting. Results The fraction of variance described by the principal components indicated that three components described the salient features of the single motor acts for each hand. Striking in the finger patterns was the prominent and varying roles of the MCP and PIP joints of the fingers, and the CMC joint of the thumb. An important aspect of the three components was their representation of distinct finger configurations within the same motor act. Principal component and graph theory analysis confirmed modular, functionally synchronous action of the involved joints. The computation of finger trajectories in one subject illustrated the workspace of the task, which differed for the right and left hands. Conclusion In this task one complex motor act of 1 s duration could be described by three elementary and hierarchically ordered grasp configurations occurring at the prescribed frequency of 1 Hz. Therefore, these configurations represent finger gaiting, described until now only in artificial systems, as the principal mechanism underlying this prototypical task. Trial registration clinicaltrials.gov, NCT02865642, registered 12 August 2016.

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Section: Sensori-motor Assessmentsupporting

confidence: 88%

“…Vancouver, Canada] [21]; and (5) tactile object recognition (TOR) was tested using a standardized protocol employing 30 everyday objects as previously described [22]. The assessments were intended solely to confirm normal sensori-motor abilities in the subjects; they were not incorporated in the following analyses.…”

Section: Sensori-motor Assessmentmentioning

confidence: 99%

Sensing form - finger gaiting as key to tactile object exploration - a data glove analysis of a prototypical daily task

Krammer

Missimer

Habegger

et al. 2020

J NeuroEngineering Rehabil

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“…The group tested normal in the sensori-motor assessment of functional tactile exploration. As indicated in Table S1 in Supporting Information, this result agrees with published data regarding ageand gender-matched healthy controls for power and precision grip [26], PSO [38], two point discrimination and TOR [28]. Figure S4 displays them for a time window of 2 sec, i.e 100 frames.…”

Section: Sensori-motor Assessmentsupporting

confidence: 88%

“…Hence, the application of this well-studied task allows generalization specifically to recognition of macroscopical aspects of objects, e.g. shape, as has been shown in a recent study by Abela et al [28]. Moreover, multiple precision grips of the involved fingers during a sequence of consecutive manipulations are subject to failure above a grasping frequency threshold of 2 Hz.…”

Section: Discussionmentioning

confidence: 88%

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Sensing form - finger gaiting as key to tactile object exploration: A data glove analysis of a prototypical daily task

Krammer

Missimer

Habegger

et al. 2020

Preprint

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Background Motor hand skill with associated dexterity is an important facility in meeting the challenges of daily activity and an important resource post-stroke. In this context, the present study investigated the finger movements of right-handed subjects during tactile manipulation of a cuboid, a prototypical component of tactile exploration. Methods For both hands of 22 subjects, we acquired the time series of consecutive multifinger cuboid manipulations using a digital data glove consisting of 29 sensors. Of these, 16 recorded the bending of metacarpo-phalangeal (MCP) and proximal interphalangeal (PIP) joints of the fingers, MCP and interphalangeal IP joints of the thumb, palm arch and carpo-metacarpal (CMC) joint of the thumb, and abduction between fingers. Results Using principle component analysis we decomposed the short action into motor patterns related to successive manipulations of the cuboid. The fraction of variance described by the principal components indicated that three components described the salient features of the single motor acts for each hand. Striking in the finger patterns was the prominent and varying roles of the MCP and PIP joints of the fingers, and the CMC joint of the thumb. An important aspect of the three components was their representation of distinct finger configurations within the same motor act. Principal component and graph theory analysis confirmed modular, functionally synchronous action of the involved joints. The computation of finger trajectories in one subject illustrated the workspace of the task, which differed for the right and left hands. Conclusion The study substantiates finger gaiting, described until now only in artificial systems, as the principal mechanism underlying this prototypical task, which is ubiquitous in daily object shape recognition.

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Pattern of cerebellar grey matter loss associated with ataxia severity in spinocerebellar ataxias type 3: a multi-voxel pattern analysis

Chen

et al. 2021

Brain Imaging and Behavior

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Early prediction of long-term tactile object recognition performance after sensorimotor stroke

Cited by 10 publications

References 102 publications

Sensing form - finger gaiting as key to tactile object exploration - a data glove analysis of a prototypical daily task

Sensing form - finger gaiting as key to tactile object exploration - a data glove analysis of a prototypical daily task

Sensing form - finger gaiting as key to tactile object exploration: A data glove analysis of a prototypical daily task

Pattern of cerebellar grey matter loss associated with ataxia severity in spinocerebellar ataxias type 3: a multi-voxel pattern analysis

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