Pointing with the left and right hands in congenitally blind children

Ittyerah, Miriam; Gaunet, Florence; Rossetti, Yves

doi:10.1016/j.bandc.2007.02.002

Cited by 27 publications

(22 citation statements)

References 50 publications

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“…Postma et al (2006) found facilitation in a delayed haptic rotation task for sighted and adventitious, but not congenital participants. It should be noticed, however, that few studies showed that the blind may rely efficiently on allocentric frames of reference Ittyerah et al 2007). Nevertheless, it looks quite convincing that blind people, especially if congenital, should reveal limitations in processing allocentric but not egocentric information.…”

Section: Introductionmentioning

confidence: 99%

The role of vision in egocentric and allocentric spatial frames of reference

2009

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Section: Introductionmentioning

confidence: 99%

The role of vision in egocentric and allocentric spatial frames of reference

2009

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“…Some studies suggested that visual feedback or visual experience was not essential for the successful execution of reaching or grasping movements (Jeannerod, 1984;Castiello et al, 1993;Sergio and Scott, 1998;Ittyerah et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Evidence for a Proprioception-Based Rapid On-Line Error Correction Mechanism for Hand Orientation during Reaching Movements in Blind Subjects

Gosselin-Kessiby

Kalaska²,

Messier³

2009

J. Neurosci.

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The contribution of visual experience to the perception and sensorimotor control of spatial orientation of the hand was investigated in blind subjects. In "orientation-matching" tasks, subjects aligned a match handle held in their right hand to a target handle held in their left hand and fixed in different orientations, with both arms outstretched. In "letter-posting" task 1, the same subjects reached out and simultaneously oriented their right hand to insert the match handle into a target slot fixed in the same range of orientations. Orientations were signaled proprioceptively by a reference handle held in the left hand. Final hand orientation errors were smaller when blind subjects simultaneously reached out and rotated their hand to insert the match handle into the target slot in letter-posting task 1 than when they held their arm extended and aligned the handles in the orientation-matching task. In letter-posting task 2, blind subjects first aligned their hand to the orientation of the target and then subsequently reached to the target with the instruction to not change hand orientation during reaching. Despite the instruction, subjects showed a reduction in absolute hand orientation error from the beginning to the end of the reach. In all tasks, performance of blind subjects was very similar to that of blindfolded normally sighted subjects. These findings provide the first evidence of an automatic on-line error-correction mechanism for hand orientation guided only by proprioceptive inputs during reaching in blind subjects, and reveal that the on-line mechanism does not depend on prior visual experience.

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“…Although vision offers distinctive input to this network, several observations indicate that the lack of visual experience may have only limited effects on skilled hand functions45678. Early visual deprivation, for example, does not prevent development of the ability to point at targets791011 and accurately reach towards and grasp objects5 (although it may impair spatial metrics12 and the ability to judge orientation13).…”

mentioning

confidence: 99%

“…Early visual deprivation, for example, does not prevent development of the ability to point at targets791011 and accurately reach towards and grasp objects5 (although it may impair spatial metrics12 and the ability to judge orientation13). Moreover, there is evidence that sighted individuals who are blindfolded can use proprioceptive feedback alone to initiate and guide rapid on-line adjustments of hand orientation during reaching movements toward a stationary target10.…”

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confidence: 99%

Anticipatory action planning in blind and sighted individuals

Cavallo

Ansuini

Gori

et al. 2017

Sci Rep

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Several studies on visually guided reach-to-grasp movements have documented that how objects are grasped differs depending on the actions one intends to perform subsequently. However, no previous study has examined whether this differential grasping may also occur without visual input. In this study, we used motion capture technology to investigate the influence of visual feedback and prior visual experience on the modulation of kinematics by intention in sighted (in both full-vision and no-vision conditions), early-blind and late-blind participants. Results provide evidence of modulation of kinematics by intention to a similar degree under both full-vision and no-vision conditions. Moreover, they demonstrate that prior visual experience has little impact on the tailoring of grasping movements to intention. This suggests that sequential action planning does not depend on visual input, and may instead be ascribed to the function of multisensory-motor cortical network that operates and develops not only in light, but also in darkness.

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Pointing with the left and right hands in congenitally blind children

Cited by 27 publications

References 50 publications

The role of vision in egocentric and allocentric spatial frames of reference

The role of vision in egocentric and allocentric spatial frames of reference

Evidence for a Proprioception-Based Rapid On-Line Error Correction Mechanism for Hand Orientation during Reaching Movements in Blind Subjects

Anticipatory action planning in blind and sighted individuals

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