Download Number Processing in the Ventral Visual Stream

Number Processing in the Ventral
Visual Stream?
Zoe Woodhead
Robert Leech
Richard Wise
L Posterior Fusiform
R Posterior Fusiform
L STS
Woodhead et al, In Preparation
Polk et al, 2002
Reinke et al, 2008
• To what extent are numbers processed by the
ventral visual stream?
• Can this be modified by task demands?
5 conditions:
1. Reading words
2. Reading numbers
3. Reading narratives
4. Reading calculations
5. False Font
Plus fixation / other
neutral stimuli?
=24000
-20000
=1200
+1000
=4000
200
x20
mat
the
cat
sat
on
Design:
• ~ 20 right handed, healthy volunteers
• Block design
– 22.5 second blocks
– 12 second inter-block interval
• 5 repetitions of each condition per run, 2 runs
– Total of 3 min 45 seconds acquisition per condition
– Run time total = 14 minutes 10 seconds
• Scanning protocol:
– 2 second whole-brain EPI, 425 volumes per run
– MPRAGE structural scan
– Field maps?