scholarly journals Biological motion versus coherent motion perception: The role of the cerebellum

2005 ◽  
Vol 5 (8) ◽  
pp. 934-934
Author(s):  
D. Jokisch ◽  
I. Daum ◽  
B. Koch ◽  
M. Schwarz ◽  
N. F. Troje
Keyword(s):  
Motion Perception ◽  
Biological Motion ◽  
Coherent Motion ◽  
Motion Versus

scholarly journals Role of dorsal and ventral stream development in biological motion perception

Neuroreport ◽  
2008 ◽  
Vol 19 (18) ◽  
pp. 1763-1767 ◽  
Author(s):  
Janine Lichtensteiger ◽  
Thomas Loenneker ◽  
Kerstin Bucher ◽  
Ernst Martin ◽  
Peter Klaver
Keyword(s):  
Motion Perception ◽  
Biological Motion ◽  
Ventral Stream ◽  
Biological Motion Perception

Biological Motion Alters Coherent Motion Perception

Perception ◽  
10.1068/p5933 ◽  
2008 ◽  
Vol 37 (12) ◽  
pp. 1783-1789 ◽  
Author(s):  
Kiyoshi Fujimoto ◽  
Akihiro Yagi
Keyword(s):  
Motion Perception ◽  
Biological Motion ◽  
Coherent Motion ◽  
Choice Procedure ◽  
Motion Coherence ◽  
Forced Choice Procedure ◽  
The Mean ◽  
Point Light ◽  
Direction Opposite ◽  
Method Of Constant Stimuli

When a movie presents a person walking, the background appears to move in the direction opposite to the person's gait. This study verified this backscroll illusion by presenting a point-light walker against a background of a random-dot cinematogram (RDC). The RDC consisted of some signal dots moving coherently either leftward or rightward among other noise dots moving randomly. The method of constant stimuli was used to vary the RDC in motion coherence from trial to trial by manipulating the direction and percentage of the signal dots. Six observers judged the perceived direction of coherent motion in a two-alternative forced-choice procedure. Response rates for coherent motion perception in the direction opposite to walking were evaluated as a function of motion coherence. The results showed that the psychometric function shifted toward the direction determined by a bias in the opposite direction to the walker. The mean threshold was about half as high as that in a control condition in which the positions of the point-lights were scrambled to impair the recognition of the walker. The results demonstrate that biological motion noticeably affects the appearance of motion coherence in the background.

The role of MT+/V5 during biological motion perception in Asperger Syndrome: An fMRI study

2007 ◽  
Vol 1 (1) ◽  
pp. 14-27 ◽  
Author(s):  
John D. Herrington ◽  
Simon Baron-Cohen ◽  
Sally J. Wheelwright ◽  
Krishna D. Singh ◽  
Edward T. Bullmore ◽  
...  
Keyword(s):  
Asperger Syndrome ◽  
Motion Perception ◽  
Biological Motion ◽  
Fmri Study ◽  
Biological Motion Perception

scholarly journals The influence of eye movements and their retinal consequences on bistable motion perception

2020 ◽  
Author(s):  
Mareike Brych ◽  
Supriya Murali ◽  
Barbara Händel
Keyword(s):  
Eye Movements ◽  
Motion Perception ◽  
The Other ◽  
Coherent Motion ◽  
Motion Direction ◽  
Similar Difference ◽  
External Events ◽  
Motion Percept ◽  
Perceived Motion

AbstractEye related movements such as blinks and microsaccades are modulated during bistable perceptual tasks, however, the role of such movements in these purely internal perceptual switches is not known. We conducted two experiments involving an ambiguous plaid stimulus, wherein participants had to continuously report their motion percept. To dissociate the effect of blinks and microsaccades from the visual consequences of such eye movements, we added external blanks and microshifts.Our results showed that while blanks facilitated a switch to the coherent motion percept, this was not the case for a switch to component percept. A similar difference was found with respect to blinks. While both types of perceptual switches were preceded by a decrease in blinks, only the switch to coherent percept was followed by an increase in blinks. These blink related findings, which we largely replicated and refined in a second study, indicate distinct internal processes underlying the two perceptual switches. Microsaccade rates, on the other hand, only showed a weak relation with perceptual switches but their direction was modulated by the perceived motion direction. Additionally, our data showed that microsaccades are differently modulated around internal (blinks) and external events (blanks, microshifts), indicating an interaction between different eye related movements.This study shows that eye movements such as blinks and microsaccades are modulated by purely internal perceptual events independent of task related motor or attentional demands. Eye movements therefore can uncover distinct internal perceptual processes that might otherwise be hard to dissociate.

scholarly journals Perception and Action in Complex Movements: The Emerging Relevance of Auditory Information

2020 ◽  
Vol 42 (3) ◽  
pp. 243-252
Author(s):  
Tiziano Agostini ◽  
Fabrizio Sors ◽  
Serena Mingolo ◽  
Giulio Baldassi ◽  
Mauro Murgia
Keyword(s):  
Motion Perception ◽  
Biological Motion ◽  
Perception And Action ◽  
Auditory Information ◽  
Motor Rehabilitation ◽  
Movement Execution ◽  
Rehabilitation Protocols ◽  
Biological Motion Perception ◽  
Training Protocols

SummaryRecent studies explored the contribution of auditory information in ecological contexts to biological motion perception and its influence on movement execution. This work provides an overview of the most influential scientific contributions in this domain and analyzes the most recent findings, both in sport and motor rehabilitation. Overall, the literature indicates that ecological sounds associated with movements are relevant for perceiving some important features of sport movements. Auditory information is also relevant during performance execution, and can be used to create training protocols. Also, similarly auditory information can be used in clinical contexts to provide rhythmic information to enhance the efficacy of motor rehabilitation protocols. In conclusion, we can say that the role of ecological sounds of movements is examined in conveying complexity of information from a gestalt perspective.

Role of the Vermal Cerebellum in Visually Guided Eye Movements and Visual Motion Perception

2019 ◽  
Vol 5 (1) ◽  
pp. 247-268 ◽  
Author(s):  
Peter Thier ◽  
Akshay Markanday
Keyword(s):  
Eye Movements ◽  
Motion Perception ◽  
Visual Motion ◽  
Cerebellar Nuclei ◽  
Visually Guided ◽  
Past Performance ◽  
Visual Motion Perception ◽  
Oculomotor Vermis ◽  
Retinal Information

The cerebellar cortex is a crystal-like structure consisting of an almost endless repetition of a canonical microcircuit that applies the same computational principle to different inputs. The output of this transformation is broadcasted to extracerebellar structures by way of the deep cerebellar nuclei. Visually guided eye movements are accommodated by different parts of the cerebellum. This review primarily discusses the role of the oculomotor part of the vermal cerebellum [the oculomotor vermis (OMV)] in the control of visually guided saccades and smooth-pursuit eye movements. Both types of eye movements require the mapping of retinal information onto motor vectors, a transformation that is optimized by the OMV, considering information on past performance. Unlike the role of the OMV in the guidance of eye movements, the contribution of the adjoining vermal cortex to visual motion perception is nonmotor and involves a cerebellar influence on information processing in the cerebral cortex.

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