Multiple object tracking in peripheral vision

Chakraborty, Arijit; Hua, Kevin; Chan, Laura; Giaschi, Deborah; Thompson, Benjamin

doi:10.1167/17.10.1308

Cited by 2 publications

(3 citation statements)

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“…Left MT+ was chosen as the stimulation site for all participants. Previously, we reported no performance differences between the right and left hemifields for the same MOT task used in this study (Chakraborty et al, 2017). In addition, a recent study suggested that the right MT+ is involved in global motion perception for both contralateral and ipsilateral hemifields whereas the influence of the left MT+ on motion perception is restricted to the contralateral right hemifield (Strong et al, 2019).…”

Section: Methodssupporting

confidence: 51%

“…Before the dots began moving, target dots were highlighted with green square boxes for 1.5 s (Figure 1). The boxes then disappeared, and the eight dots moved randomly for 5 s. The trajectory of each dot was randomly varied every two frames with the constraint that dots maintained a minimum spacing of 1.5 to reduce crowding effects, based on our previous work (Chakraborty et al, 2017). This minimum spacing meant that dots never overlapped with one another.…”

Section: Mot Stimulimentioning

confidence: 99%

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Continuous theta burst TMS of area MT+ impairs attentive motion tracking

Chakraborty

Tran

Silva

et al. 2021

Eur J of Neuroscience

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Attentive motion tracking deficits measured using multiple object tracking (MOT) tasks have been identified in a number of neurodevelopmental disorders such as amblyopia and autism. These deficits are often attributed to the abnormal development of high-level attentional networks. However, neuroimaging evidence from amblyopia suggests that reduced MOT performance can be explained by impaired function in motion-sensitive area MT+ alone. To test the hypothesis that a subtle disruption of MT+ function could cause MOT impairment, we assessed whether continuous theta burst stimulation (cTBS) of MT+ influenced MOT task accuracy in individuals with normal vision. The MOT stimulus consisted of four target and four distractor dots and was presented at AE10 eccentricity (right/left hemifield). fMRI-guided cTBS was applied to left MT+. Participants (n = 13, age: 27 AE 3) attended separate active and sham cTBS sessions where the MOT task was completed before, 5-min post-and 30-min post-cTBS. Active cTBS significantly impaired MOT task accuracy relative to baseline for the right (stimulated) hemifield 5-min (10 AE 2% reduction) and 30-min (14 AE 3% reduction) post-stimulation. No impairment occurred within the left (control) hemifield after active cTBS or for either hemifield after sham cTBS. These results highlight the importance of lower level motion processing for MOT, suggesting that a minor disruption of MT+ function alone is sufficient to cause a deficit in MOT performance.

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Section: Methodssupporting

confidence: 51%

Section: Mot Stimulimentioning

confidence: 99%

Continuous theta burst TMS of area MT+ impairs attentive motion tracking

Chakraborty

Tran

Silva

et al. 2021

Eur J of Neuroscience

Self Cite

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show abstract

“…The stimuli were centered 10° to the left or right of a bright fixation cross; this eccentricity was chosen to stimulate the contralateral MT+ (Cai, Chen, Zhou, Thompson, & Fang, 2014;Chen, Cai, Zhou, Thompson, & Fang, 2016). Minimum dot spacing was maintained at 1.5° to reduce crowding effects, based on our previous work (Chakraborty, Hua, Chan, Giaschi, & Thompson, 2017). Before the dots began moving, target dots were highlighted with green square boxes at the beginning of the task for 1.5 seconds (Figure 2), following which the boxes disappeared and the 8 dots moved randomly for 5 seconds.…”

Section: Multiple-object Tracking Stimulimentioning

confidence: 99%

Continuous theta burst TMS of area MT+ impairs attentive motion tracking

Chakraborty

Tran

Silva

et al. 2019

Preprint

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Attentive motion tracking deficits, measured using multiple object tracking (MOT) tasks, have been identified in a number of visual and neurodevelopmental disorders such as amblyopia and autism. These deficits are often attributed to the abnormal development of high-level attentional networks. However, neuroimaging evidence from amblyopia suggests that reduced MOT performance can be explained by impaired function in motion sensitive area MT+ alone. To test the hypothesis that MT+ plays an important role in MOT, we assessed whether modulation of MT+ activity using continuous theta burst stimulation (cTBS) influenced MOT performance in participants with normal vision. An additional experiment involving numerosity judgements of MOT stimulus elements was conducted to control for non-specific effects of MT+ cTBS on psychophysical task performance. The MOT stimulus consisted of 4 target and 4 distractor dots and was presented at 10° eccentricity in the right or left hemifield. Functional MRI-guided cTBS was applied to left MT+. Participants (n = 13, age:27 ± 3) attended separate active and sham cTBS sessions where the MOT task was completed before, 5 mins post and 30 mins post cTBS. Active cTBS significantly impaired MOT task accuracy relative to baseline for the right (stimulated) hemifield 5 mins (10 ± 2% reduction; t12 = 1.95, p = 0.03) and 30 mins (14 ± 3% reduction; t12 = 2.96, p = 0.01) post stimulation. No impairment occurred within the left (control) hemifield after active cTBS or for either hemifield after sham cTBS. Numerosity task performance was unaffected by cTBS. These results highlight the importance of lower-level motion processing for MOT and suggest that abnormal function of MT+ alone is sufficient to cause a deficit in MOT task performance.

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Multiple object tracking in peripheral vision

Cited by 2 publications

References 0 publications

Continuous theta burst TMS of area MT+ impairs attentive motion tracking

Continuous theta burst TMS of area MT+ impairs attentive motion tracking

Continuous theta burst TMS of area MT+ impairs attentive motion tracking

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