TY  - JOUR
PY  - 1998//
TI  - A spatially oriented decision does not induce consciousness in a motor task
JO  - Consciousness and cognition
A1  - Bridgeman, B.
A1  - Huemer, Valerie A.
SP  - 454
EP  - 464
VL  - 7
IS  - 3
N2  - Visual information follows at least two branches in the human nervous system, following a common input stage: a cognitive "what" branch governs perception and experience, while a sensorimotor "how" branch handles visually guided behavior though its outputs are unconscious. The sensorimotor system is probed with an isomorphic task, requiring a 1:1 relationship between target position and motor response. The cognitive system, in contrast, is probed with a forced qualitative decision, expressed verbally, about the location of a target. Normally, the cognitive system is influenced by context-induced illusions of visual direction, while the sensorimotor system is not. Here, we inquire whether the process of making a spatially based decision is critical in forcing subjects to use the information in the cognitive system for spatial tasks. Subjects hear a tone that determines whether they jab an "X" or an "O" with the forefinger. Despite making a decision about which target to contact, the jab is not influenced by the position of a surrounding frame, indicating that choice can be handled within the context-insensitive sensorimotor system.<p /> <p>Language: en</p>
LA  - en
SN  - 1053-8100
UR  - http://dx.doi.org/10.1006/ccog.1998.0357
ID  - ref1
ER  -