45
responses in STSms in Experiment 2. Table 1 lists a summary of the experimental
conditions across experiments.
Subjects were recruited and informed consent was obtained in accordance with
the University of Texas Committee for the Protection of Human Subjects. Eight subjects
participated in experiment one (2M, 6F, mean age 26 years) and twelve subjects
participated in experiment two (8M, 4F, mean age 27 years). Subjects' data was
anonymized with two letter experiment codes not corresponding to the subjects'
initials.
Tablet
Distribution of experimental conditions across subjects and experiments
|
Task |
Scan series |
Design |
Conditions |
|
Experiment 1:12 subjects | |||
|
Visual Iocalizer |
1-3 |
BD |
2 |
|
Vibrotactile somatosensory and auditory |
3-6 |
RER |
6 |
|
Experiment 2:8 subjects ` | |||
|
Visual motion Iocalizer |
1 |
BD |
3 |
|
Visual object Iocalizer |
1 |
BD |
3 |
|
Auditorylocalizer |
1 |
BD |
2 |
|
Vibrotactile somatosensory |
4-6 |
RER |
6 |
Each task refers to a separate experimental condition undertaken in a
separate MR scan series ("run"). Every subject performed every task, but the
number of scan series devoted to each task varied from subject to subject.
The number in the scan series column shows the range across subjects. The
design column shows the type of stimulus presentation paradigm (BD: block
design; RER: rapid event-related). The number in the conditions column
shows the number of different conditions in each task, including fixation
baseline.
General MRI Methods
Participants were scanned using a 3-tesla whole-body MR scanner (Phillips
Medical Systems, Bothell, WA). Anatomical images were collected using a
magnetization-prepared 180 degrees radio-frequency pulses and rapid gradient-echo