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Cambios en el cerebro y su relación con ... la hipersensibilidad. Empty Cambios en el cerebro y su relación con ... la hipersensibilidad.

Mar Dic 30 2014, 15:30
The highly sensitive brain: an fMRI study of sensory
processing sensitivity and response to others’ emotions

Bianca P. Acevedo1
, Elaine N. Aron2
, Arthur Aron2
, Matthew-Donald Sangster3
, Nancy Collins1 &
Lucy L. Brown4
Department of Psychological and Brain Sciences, University of California, Santa Barbara, California
Department of Psychology, Stony Brook University, New York, New York
Monmouth University, Monmouth County, New Jersey
Department of Neurology, Albert Einstein College of Medicine, Bronx, New York

Background: Theory and research suggest that sensory processing sensitivity
(SPS), found in roughly 20% of humans and over 100 other species, is a trait
associated with greater sensitivity and responsiveness to the environment and to
social stimuli. Self-report studies have shown that high-SPS individuals are
strongly affected by others’ moods, but no previous study has examined neural
systems engaged in response to others’ emotions. Methods: This study examined
the neural correlates of SPS (measured by the standard short-form Highly
Sensitive Person [HSP] scale) among 18 participants (10 females) while viewing
photos of their romantic partners and of strangers displaying positive, negative,
or neutral facial expressions. One year apart, 13 of the 18 participants were
scanned twice. Results: Across all conditions, HSP scores were associated with
increased brain activation of regions involved in attention and action planning
(in the cingulate and premotor area [PMA]). For happy and sad photo conditions,
SPS was associated with activation of brain regions involved in awareness,
integration of sensory information, empathy, and action planning (e.g., cingulate,
insula, inferior frontal gyrus [IFG], middle temporal gyrus [MTG], and
PMA). Conclusions: As predicted, for partner images and for happy facial photos,
HSP scores were associated with stronger activation of brain regions
involved in awareness, empathy, and self-other processing. These results provide
evidence that awareness and responsiveness are fundamental features of SPS,
and show how the brain may mediate these traits.

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