Spatial updating: how the brain keeps track of changing object locations during observer motion.
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Spatial updating: how the brain keeps track of changing object locations during observer motion. / Wolbers, Thomas; Hegarty, Mary; Büchel, Christian; Loomis, Jack M.
in: NAT NEUROSCI, Jahrgang 11, Nr. 10, 10, 2008, S. 1223-1230.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Spatial updating: how the brain keeps track of changing object locations during observer motion.
AU - Wolbers, Thomas
AU - Hegarty, Mary
AU - Büchel, Christian
AU - Loomis, Jack M
PY - 2008
Y1 - 2008
N2 - As you move through an environment, the positions of surrounding objects relative to your body constantly change. Updating these locations is a central feature of situational awareness and readiness to act. Here, we used functional magnetic resonance imaging and a virtual environment to test how the human brain uses optic flow to monitor changing object coordinates. Only activation profiles in the precuneus and the dorsal premotor cortex (PMd) were indicative of an updating process operating on a memorized egocentric map of space. A subsequent eye movement study argued against the alternative explanation that activation in PMd could be driven by oculomotor signals. Finally, introducing a verbal response mode revealed a dissociation between the two regions, with the PMd only showing updating-related responses when participants responded by pointing. We conclude that visual spatial updating relies on the construction of updated representations in the precuneus and the context-dependent planning of motor actions in PMd.
AB - As you move through an environment, the positions of surrounding objects relative to your body constantly change. Updating these locations is a central feature of situational awareness and readiness to act. Here, we used functional magnetic resonance imaging and a virtual environment to test how the human brain uses optic flow to monitor changing object coordinates. Only activation profiles in the precuneus and the dorsal premotor cortex (PMd) were indicative of an updating process operating on a memorized egocentric map of space. A subsequent eye movement study argued against the alternative explanation that activation in PMd could be driven by oculomotor signals. Finally, introducing a verbal response mode revealed a dissociation between the two regions, with the PMd only showing updating-related responses when participants responded by pointing. We conclude that visual spatial updating relies on the construction of updated representations in the precuneus and the context-dependent planning of motor actions in PMd.
M3 - SCORING: Zeitschriftenaufsatz
VL - 11
SP - 1223
EP - 1230
JO - NAT NEUROSCI
JF - NAT NEUROSCI
SN - 1097-6256
IS - 10
M1 - 10
ER -
