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Using time-to-contact information to assess potential collision modulates both visual and temporal prediction networks.

Coull JT, Vidal F, Goulon C, Nazarian B, Craig C - Front Hum Neurosci (2008)

Bottom Line: We also demonstrated that the temporal derivative of the perceptual index tau (tau-dot) held predictive value for making collision judgements and varied inversely with activity in primary visual cortex (V1).Finally, egocentric viewpoints provoked a response bias for reporting collisions, rather than no-collisions, reflecting increased caution for head-on approaches.Associated increases in SMA activity suggest motor preparation mechanisms were engaged, despite the perceptual nature of the task.

View Article: PubMed Central - PubMed

Affiliation: Laboratoire de Neurobiologie de la Cognition, Université Aix-Marseille & CNRS Marseille, France. jennifer.coull@univ-provence.fr

ABSTRACT
Accurate estimates of the time-to-contact (TTC) of approaching objects are crucial for survival. We used an ecologically valid driving simulation to compare and contrast the neural substrates of egocentric (head-on approach) and allocentric (lateral approach) TTC tasks in a fully factorial, event-related fMRI design. Compared to colour control tasks, both egocentric and allocentric TTC tasks activated left ventral premotor cortex/frontal operculum and inferior parietal cortex, the same areas that have previously been implicated in temporal attentional orienting. Despite differences in visual and cognitive demands, both TTC and temporal orienting paradigms encourage the use of temporally predictive information to guide behaviour, suggesting these areas may form a core network for temporal prediction. We also demonstrated that the temporal derivative of the perceptual index tau (tau-dot) held predictive value for making collision judgements and varied inversely with activity in primary visual cortex (V1). Specifically, V1 activity increased with the increasing likelihood of reporting a collision, suggesting top-down attentional modulation of early visual processing areas as a function of subjective collision. Finally, egocentric viewpoints provoked a response bias for reporting collisions, rather than no-collisions, reflecting increased caution for head-on approaches. Associated increases in SMA activity suggest motor preparation mechanisms were engaged, despite the perceptual nature of the task.

No MeSH data available.


Related in: MedlinePlus

Task-specific networks. (A) Colour tasks preferentially activated visual area V4 (x, y, z = −18, −75, −12; 36, −60, −21) and intraparietal sulcus (IPS) (x, y, z = −30, −69, 39; 30, −66, 42) bilaterally during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto coronal (y = −69 mm) and transverse (z = −18 mm) slices of the averaged structural MRI. (B) TTC tasks preferentially activated left pars opercularis of the inferior frontal lobe (part of ventral premotor cortex (vPMC)) (x, y, z = −51, 6, 3) and the supramarginal gyrus of left inferior parietal lobule (IPL) (x, y, z = −63, −45, 39) during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto saggital (x = −51 and −60 mm for vPMC and IPL activations respectively) and transverse (z = 3 and 39 mm for vPMC and IPL activations respectively) slices of the averaged structural MRI. Areas of activity common to allocentric and egocentric viewpoints were derived from a logical AND inclusive-masking procedure.
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Figure 3: Task-specific networks. (A) Colour tasks preferentially activated visual area V4 (x, y, z = −18, −75, −12; 36, −60, −21) and intraparietal sulcus (IPS) (x, y, z = −30, −69, 39; 30, −66, 42) bilaterally during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto coronal (y = −69 mm) and transverse (z = −18 mm) slices of the averaged structural MRI. (B) TTC tasks preferentially activated left pars opercularis of the inferior frontal lobe (part of ventral premotor cortex (vPMC)) (x, y, z = −51, 6, 3) and the supramarginal gyrus of left inferior parietal lobule (IPL) (x, y, z = −63, −45, 39) during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto saggital (x = −51 and −60 mm for vPMC and IPL activations respectively) and transverse (z = 3 and 39 mm for vPMC and IPL activations respectively) slices of the averaged structural MRI. Areas of activity common to allocentric and egocentric viewpoints were derived from a logical AND inclusive-masking procedure.

Mentions: Egocentric representations of colour-processing activated visual area V1, visual area V4 bilaterally, intraparietal sulcus bilaterally and left middle frontal gyrus. Allocentric representations of colour-processing activated a more dorsal region of visual area V1, visual area V4 bilaterally, intraparietal sulcus bilaterally, left middle frontal gyrus and retrosplenial cortex (Table 2). Inclusive masking revealed that areas common to both egocentric and allocentric viewpoints were V4 bilaterally and intraparietal sulcus bilaterally (Figure 3A).


Using time-to-contact information to assess potential collision modulates both visual and temporal prediction networks.

Coull JT, Vidal F, Goulon C, Nazarian B, Craig C - Front Hum Neurosci (2008)

Task-specific networks. (A) Colour tasks preferentially activated visual area V4 (x, y, z = −18, −75, −12; 36, −60, −21) and intraparietal sulcus (IPS) (x, y, z = −30, −69, 39; 30, −66, 42) bilaterally during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto coronal (y = −69 mm) and transverse (z = −18 mm) slices of the averaged structural MRI. (B) TTC tasks preferentially activated left pars opercularis of the inferior frontal lobe (part of ventral premotor cortex (vPMC)) (x, y, z = −51, 6, 3) and the supramarginal gyrus of left inferior parietal lobule (IPL) (x, y, z = −63, −45, 39) during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto saggital (x = −51 and −60 mm for vPMC and IPL activations respectively) and transverse (z = 3 and 39 mm for vPMC and IPL activations respectively) slices of the averaged structural MRI. Areas of activity common to allocentric and egocentric viewpoints were derived from a logical AND inclusive-masking procedure.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2572212&req=5

Figure 3: Task-specific networks. (A) Colour tasks preferentially activated visual area V4 (x, y, z = −18, −75, −12; 36, −60, −21) and intraparietal sulcus (IPS) (x, y, z = −30, −69, 39; 30, −66, 42) bilaterally during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto coronal (y = −69 mm) and transverse (z = −18 mm) slices of the averaged structural MRI. (B) TTC tasks preferentially activated left pars opercularis of the inferior frontal lobe (part of ventral premotor cortex (vPMC)) (x, y, z = −51, 6, 3) and the supramarginal gyrus of left inferior parietal lobule (IPL) (x, y, z = −63, −45, 39) during both allocentric and egocentric viewpoints. Activations are rendered onto a standard template brain, and superimposed onto saggital (x = −51 and −60 mm for vPMC and IPL activations respectively) and transverse (z = 3 and 39 mm for vPMC and IPL activations respectively) slices of the averaged structural MRI. Areas of activity common to allocentric and egocentric viewpoints were derived from a logical AND inclusive-masking procedure.
Mentions: Egocentric representations of colour-processing activated visual area V1, visual area V4 bilaterally, intraparietal sulcus bilaterally and left middle frontal gyrus. Allocentric representations of colour-processing activated a more dorsal region of visual area V1, visual area V4 bilaterally, intraparietal sulcus bilaterally, left middle frontal gyrus and retrosplenial cortex (Table 2). Inclusive masking revealed that areas common to both egocentric and allocentric viewpoints were V4 bilaterally and intraparietal sulcus bilaterally (Figure 3A).

Bottom Line: We also demonstrated that the temporal derivative of the perceptual index tau (tau-dot) held predictive value for making collision judgements and varied inversely with activity in primary visual cortex (V1).Finally, egocentric viewpoints provoked a response bias for reporting collisions, rather than no-collisions, reflecting increased caution for head-on approaches.Associated increases in SMA activity suggest motor preparation mechanisms were engaged, despite the perceptual nature of the task.

View Article: PubMed Central - PubMed

Affiliation: Laboratoire de Neurobiologie de la Cognition, Université Aix-Marseille & CNRS Marseille, France. jennifer.coull@univ-provence.fr

ABSTRACT
Accurate estimates of the time-to-contact (TTC) of approaching objects are crucial for survival. We used an ecologically valid driving simulation to compare and contrast the neural substrates of egocentric (head-on approach) and allocentric (lateral approach) TTC tasks in a fully factorial, event-related fMRI design. Compared to colour control tasks, both egocentric and allocentric TTC tasks activated left ventral premotor cortex/frontal operculum and inferior parietal cortex, the same areas that have previously been implicated in temporal attentional orienting. Despite differences in visual and cognitive demands, both TTC and temporal orienting paradigms encourage the use of temporally predictive information to guide behaviour, suggesting these areas may form a core network for temporal prediction. We also demonstrated that the temporal derivative of the perceptual index tau (tau-dot) held predictive value for making collision judgements and varied inversely with activity in primary visual cortex (V1). Specifically, V1 activity increased with the increasing likelihood of reporting a collision, suggesting top-down attentional modulation of early visual processing areas as a function of subjective collision. Finally, egocentric viewpoints provoked a response bias for reporting collisions, rather than no-collisions, reflecting increased caution for head-on approaches. Associated increases in SMA activity suggest motor preparation mechanisms were engaged, despite the perceptual nature of the task.

No MeSH data available.


Related in: MedlinePlus