PMC3396380_01
LvOT activation for numbers in healthy controls at the site of the lesion in JL. Controls' activations in LvOT regions on (A) a rendered brain, (B) sections, and (C) sections showing JL's lesion.
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F1
An MRI-scan showed a lesion involving the left ventral occipito-temporal cortex, LvOT (see Figure 1C).
Patients B and T brain lesions.
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F2
The number semantic task consisted of two subtasks: (i) a quantity task, which required a finger-press response to indicate the larger or smaller of two numbers; and (ii) a category task, which required a finger-press response to indicate which of two numbers corresponded to either a summer or winter date or a sleeping or working time (see Figure 3). Figure 3). For more details about the stimuli used see.
PMC3396380_02
Experimental design. The same semantic (quantity and category tasks) and perceptual color decision tasks were used with pairs of Arabic numbers (left panel) and object names (right panel) which were presented in one of four possible colors (red, yellow, blue, green). In each trial, participants viewed pairs of stimuli presented one above the other with a fixation cross in the middle of the computer screen. Subjects were instructed to indicate with a button press which of the two stimuli was the correct response to a question consisting of two keywords presented above the upper stimulus before and during the stimulus display. For each task, one of two possible questions was presented in different blocks in counterbalanced order (i.e., quantity: 'larger/smaller' and 'more/less'; category: 'summer/winter' and 'working/sleeping' for the semantic tasks; 'red/yellow/blue/green item?' for the color-decision task, see for more details). [To view this figure in color, please visit the online version of this Journal.]
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F3
Patient B is a right-handed English-speaking man who sustained a right hemisphere infarct in 2000 when he was 59 years old (see Figure 2).
PMC3396380_03
Experimental design. The same semantic (quantity and category tasks) and perceptual color decision tasks were used with pairs of Arabic numbers (left panel) and object names (right panel) which were presented in one of four possible colors (red, yellow, blue, green). In each trial, participants viewed pairs of stimuli presented one above the other with a fixation cross in the middle of the computer screen. Subjects were instructed to indicate with a button press which of the two stimuli was the correct response to a question consisting of two keywords presented above the upper stimulus before and during the stimulus display. For each task, one of two possible questions was presented in different blocks in counterbalanced order (i.e., quantity: 'larger/smaller' and 'more/less'; category: 'summer/winter' and 'working/sleeping' for the semantic tasks; 'red/yellow/blue/green item?' for the color-decision task, see for more details). [To view this figure in color, please visit the online version of this Journal.]
nncs18_271_f3.jpg
PMC3396380_03_nncs18_271_f3.jpg
F3
Patient B is a right-handed English-speaking man who sustained a right hemisphere infarct in 2000 when he was 59 years old (see Figure 2).
Patients B and T brain lesions.
nncs18_271_f2.jpg
PMC3396380_03_nncs18_271_f2.jpg
F2
The number semantic task consisted of two subtasks: (i) a quantity task, which required a finger-press response to indicate the larger or smaller of two numbers; and (ii) a category task, which required a finger-press response to indicate which of two numbers corresponded to either a summer or winter date or a sleeping or working time (see Figure 3). Figure 3). For more details about the stimuli used see.