The scientists studying facial expressions

Fox, Dan

doi:10.1038/d41586-020-00504-8

Cited by 2 publications

(2 citation statements)

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“…The advantage of applying kinematic analysis to pairs of markers rather than individual markers is that it accounts for any head movement [ 37 ]. Because of its simplicity, the Clepsydra model could be validated and replicated by different laboratories around the world [ 38 ]. Six infrared cameras (sampling rate 140 Hz), placed in a semicircle at a distance of 1–1.2 m from the center of the room ( Figure 1 b, bottom picture) captured the relative position of the markers.…”

Section: General Methodsmentioning

confidence: 99%

The Spatiotemporal Dynamics of Facial Movements Reveals the Left Side of a Posed Smile

Straulino,

Scarpazza,

Spoto

et al. 2023

Biology

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Humans can recombine thousands of different facial expressions. This variability is due to the ability to voluntarily or involuntarily modulate emotional expressions, which, in turn, depends on the existence of two anatomically separate pathways. The Voluntary (VP) and Involuntary (IP) pathways mediate the production of posed and spontaneous facial expressions, respectively, and might also affect the left and right sides of the face differently. This is a neglected aspect in the literature on emotion, where posed expressions instead of genuine expressions are often used as stimuli. Two experiments with different induction methods were specifically designed to investigate the unfolding of spontaneous and posed facial expressions of happiness along the facial vertical axis (left, right) with a high-definition 3-D optoelectronic system. The results showed that spontaneous expressions were distinguished from posed facial movements as revealed by reliable spatial and speed key kinematic patterns in both experiments. Moreover, VP activation produced a lateralization effect: compared with the felt smile, the posed smile involved an initial acceleration of the left corner of the mouth, while an early deceleration of the right corner occurred in the second phase of the movement, after the velocity peak.

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Section: General Methodsmentioning

confidence: 99%

The Spatiotemporal Dynamics of Facial Movements Reveals the Left Side of a Posed Smile

Straulino,

Scarpazza,

Spoto

et al. 2023

Biology

View full text Add to dashboard Cite

show abstract

“…The advantage of applying kinematic analysis to pairs of markers rather than individual markers is that it accounts for any head movement [37]. Because of its simplicity, the Clepsydra model could be validated and replicated by different laboratories around the world [38]. Six infrared cameras (sampling rate 140 Hz), placed in a semicircle at a distance of 1-1.2 m from the center of the room (Figure 1b, bottom picture) captured the relative position of the markers.…”

Section: Apparatusmentioning

confidence: 99%

The Spatiotemporal Dynamics of Facial Movements Reveals the Left Side of a Posed Smile

Straulino,

Scarpazza,

Spoto

et al. 2023

Preprint

View full text Add to dashboard Cite

Humans can recombine thousands of different facial expressions. This variability is due to the ability to voluntarily or involuntarily modulate emotional expressions, which, in turn, depends on the existence of two anatomically separate pathways. The Voluntary (VP) and Involuntary (IP) pathways mediate the production of posed and spontaneous facial expressions, respectively, and might also affect the left and right sides of the face differently. This is a neglected aspect in the emotion literature, where posed expressions instead of genuine expressions are often used as stimuli. Two experiments with different induction methods were specifically designed to inves-tigate the unfolding of spontaneous and posed facial expressions of happiness along the facial vertical axis (left, right) with a high-definition 3D optoelectronic system. The results showed that spontaneous expressions were distinguished from posed facial movements as revealed by relia-ble spatial and speed key kinematic patterns in both experiments. Moreover, VP activation pro-duced a lateralization effect: compared with the felt smile, the posed smile involved an initial acceleration of the left corner of the mouth, while an early deceleration of the right corner oc-curred in the second phase of the movement, after the velocity peak.

show abstract

The scientists studying facial expressions

Cited by 2 publications

References 0 publications

The Spatiotemporal Dynamics of Facial Movements Reveals the Left Side of a Posed Smile

The Spatiotemporal Dynamics of Facial Movements Reveals the Left Side of a Posed Smile

The Spatiotemporal Dynamics of Facial Movements Reveals the Left Side of a Posed Smile

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