Sensory-motor coordination during grasping and manipulative actions

Johnasson, Roland S.; Cole, Kelly J.

doi:10.1016/0960-9822(92)90112-n

Cited by 62 publications

(76 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Precision grip, the act of grasping objects between the thumb and index finger, is a complex sequential action that requires precise application of forces large enough to prevent objects from slipping but not too large to break fragile objects or cause fatigue 42. Impaired precision, especially pincer grip, is a likely surrogate for split hand.…”

Section: Cortical Aspects Of Split Hand Syndromementioning

confidence: 99%

The split hand syndrome in amyotrophic lateral sclerosis

Eisen

Kuwabara

2011

J Neurol Neurosurg Psychiatry

137

104

View full text Add to dashboard Cite

In amyotrophic lateral sclerosis (ALS), hand muscle wasting preferentially affects the 'thenar (lateral) hand', including the abductor pollicis brevis (APB) and first dorsal interosseous (FDI) muscles, with relative sparing of the hypothenar muscles (the abductor digiti minimi (ADM)). This peculiar pattern of dissociated atrophy of the intrinsic hand muscles is termed the 'split hand' and is rarely seen in diseases other than ALS. The muscles involved in the split hand are innervated through the same spinal segments (C8 and T1), and FDI and ADM, which are differentially affected, are both ulnar nerve innervated. The physiological mechanisms underlying the split hand in ALS are incompletely understood but both cortical and spinal/peripheral mechanisms are probably involved. Motor potentials evoked by magnetic stimulation are significantly smaller when recorded from the thenar complex, compared with the hypothenar muscles, supporting a cortical mechanism. But peripheral axonal excitability studies have suggested that APB/FDI motor axons have more prominent persistent sodium currents than ADM axons, leading to higher axonal excitability and thereby more ready degeneration. Pincer or precision grip is vital to human hand function, and frequent use of thenar complex muscles may lead to greater oxidative stress and metabolic demands at both upper and lower motoneurons innervating the APB and FDI. The split hand is a useful diagnostic sign in early ALS, and recent objective studies indicate that the sign has a high degree of specificity.

show abstract

Section: Cortical Aspects Of Split Hand Syndromementioning

confidence: 99%

The split hand syndrome in amyotrophic lateral sclerosis

Eisen

Kuwabara

2011

J Neurol Neurosurg Psychiatry

137

104

View full text Add to dashboard Cite

show abstract

“…The brain regions contributing to the control of reaching must combine, transform, and transmit these disparate input sources in a way which leads to a pattern of muscle activations. Recent approaches to the study of the control of reaching have stressed these concepts of information representation and coordinate system transformations [46,16,17,35,59,38]. This emphasis reflects a general trend in the study of sensory-motor function [44, 23.…”

Section: Italymentioning

confidence: 99%

“…Evidently, the central nervous system (CNS) dynamically regulates both the preparatory muscle activity and spinal and supraspinal reflex pathways in a predictive manner. Hence, this control represents an anticipatory adaptation of limb mechanics according to task demands and implies that the CNS entertains global models of relevant object and task properties during manipulation (e.g., [45][46][47]), including the associated postural control [48][49][50].…”

Section: Anticipatory Control In Bimanual Manipulative Tasksmentioning

confidence: 99%

“…This involves slow, more discontinuous probing force increases, until terminated by the sensory input at the actual take-off. Same FA II afferent in Band C. A adapted from [3] and B-C from [46], Afferent responses to object lift-off and touch-down and somatosensory updating of weight related memories. The most striking feature of the FA IT afferents (i.e., Pacinian corpuscle afferents) was distinct burst responses at the object's lift-off and at the sudden cessation of the movement at touch-down when an object is replaced on a support (Fig.…”

Section: Sequential Phase Coordinationmentioning

confidence: 99%

See 1 more Smart Citation

Neural Bases of Motor Behaviour

Lacquaniti¹,

Viviani²

1996

View full text Add to dashboard Cite

NATo-PCo-DATA BASEThe electronic index to the NATO ASI Series provides full bibliographical references (with keywords and/or abstracts) to more than 50000 contributions from international scientists published in all sections of the NATO ASI Series. Access to the NATO-PCO-DATA BASE is possible in two ways:-via online FILE 128 (NATO-PCO-DATA BASE) hosted by ESRIN, Via Galileo Galilei, 1-00044 Frascati,ltaly.-via CO-ROM "NATO-PCO-DAT A BASE" with user-friendly retrieval software in English, French and German (© wrv GmbH and DATAWARE Technologies Inc. 1989). The CO-ROM can be ordered through any member of the Board of Publishers or through NATO-PCO, OveriJse, Belgium. Do executed, imagined and suppressed saccadic eye movements share the same neuronal mechanisms in healthy human ? 153 A. Roucoux, M. MISSAL, M. CROMMELINCK, P. LEFEVRE The role of the superior colliculus infast and slow gaze orientation 165

show abstract

“…Another reason for choosing this task is that this action involves an explicit component (moving the object) and an implicit one (modulating the grip force). It is well known (Forssberg et al, 1991; Flanagan and Wing, 1993; Flanagan and Tresilian, 1994; Flanagan et al, 1993; Gao et al, 2005; Zatsiorsky et al, 2005) that motion of a vertically oriented hand-held object in the vertical direction is associated with feed-forward modulation of the grip force, which keeps the safety margin (the relative amount of grip force over the slippage threshold, Johansson and Westling, 1988; Johansson and Cole, 1993) relatively unchanged. The second major goal of our study was to explore causes for the reported grip-force-load-force coupling at the level of assumed and experimentally reconstructed control variables.…”

Section: Introductionmentioning

confidence: 99%

Moving a hand-held object: Reconstruction of referent coordinate and apparent stiffness trajectories

et al. 2015

View full text Add to dashboard Cite

This study used the framework of the referent configuration hypothesis and slow changes in the external conditions during vertical oscillation of a hand-held object to infer the characteristics of hypothetical control variables. The study had two main objectives: (1) to show that hypothetical control variables, namely, referent coordinates and apparent stiffness of vertical hand position and grip force can be measured in an experiment; and (2) to establish relation(s) between these control variables that yield the classic grip-force-load-force coupling. Healthy subjects gripped a handle and performed vertical oscillations between visual targets at one of five metronome-prescribed frequencies. A Hapticmaster robot was used to induce slow changes in the vertical force applied to the handle, while the size of the handle was changed slowly leading to changes in the grip aperture. The subjects were instructed not to react to possible changes in the external forces. A linear, second-order model was used to reconstruct the referent coordinate and apparent stiffness values for each phase of the vertical oscillation cycle using across-cycle regressions. The reconstructed time profiles of the referent coordinates and apparent stiffness showed consistent trends across subjects and movement frequencies. To validate the method, these values were used to predict the vertical force and the grip force applied to the handle for movement cycles that were not utilized in the reconstruction process. Analysis of the coupling between the four variables, two referent coordinates and two apparent stiffness values, revealed a single strong constraint reflecting the coupling between the grip force and vertical force. We view these data as providing experimental support for the idea of controlling natural, multi-muscle actions with shifts in a low-dimensional set of referent coordinates.

show abstract

Sensory-motor coordination during grasping and manipulative actions

Cited by 62 publications

References 0 publications

The split hand syndrome in amyotrophic lateral sclerosis

The split hand syndrome in amyotrophic lateral sclerosis

Neural Bases of Motor Behaviour

Moving a hand-held object: Reconstruction of referent coordinate and apparent stiffness trajectories

Contact Info

Product

Resources

About