Reduced perceptual sensitivity for biological motion in paraplegia patients
Many physiological and psychophysical studies suggest that the perception and execution of movement may be linked [1–4]. Here we ask whether severe impairment of locomotion could impact on the capacity to perceive human locomotion. We measured sensitivity for the perception of point-light walkers —...
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| Veröffentlicht in: | Current biology 2011-11, Vol.21 (22), p.R910-R911 |
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| creator | Arrighi, Roberto Cartocci, Giulia Burr, David |
| description | Many physiological and psychophysical studies suggest that the perception and execution of movement may be linked [1–4]. Here we ask whether severe impairment of locomotion could impact on the capacity to perceive human locomotion. We measured sensitivity for the perception of point-light walkers — animation sequences of human biological motion portrayed by only the joints — in patients with severe spinal injury. These patients showed a huge (nearly three-fold) reduction of sensitivity for detecting and for discriminating the direction of biological motion compared with healthy controls, and also a smaller (∼40%) reduction in sensitivity to simple translational motion. However, they showed no statistically significant reduction in contrast sensitivity for discriminating the orientation of static gratings. The results point to a strong interaction between perceiving and producing motion, implicating shared algorithms and neural mechanisms. |
| doi_str_mv | 10.1016/j.cub.2011.09.048 |
| format | Article |
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| source | MEDLINE; Cell Press Free Archives; Access via ScienceDirect (Elsevier); EZB-FREE-00999 freely available EZB journals |
| subjects | Adult algorithms Contrast Sensitivity Humans Locomotion Motion Perception Paraplegia - physiopathology patients Photic Stimulation |
| title | Reduced perceptual sensitivity for biological motion in paraplegia patients |
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