1. Temporal and Spatial Enumeration Processes in the Primate Parietal Cortex Andreas Nieder, Ilka Diester, Oana Tudusciuc נושאים מרכזיים בנוירוביולוגיה תרגיל 5 תפיסת מספר

2. Numerical cognition Numerical Quantity (Numerosity) How much? Numerical Rank Which position?

3. פרוטוקול הניסוי הצגה סדרתיתהצגה במקביל

4. Confounding factors simultaneous: – Area – Circumference – Shape – Density Sequential: – duration

5. Stimulus types for the sequential protocol standard protocolEqual sample durationequal item/pause duration

6. behavioral performance Monkey 1Monkey 2Monkey 1 & 2

7. Recording sites and neural responses during sample presentation mean activity of the neuron in (C) mean activity of the neuron in (F)

8. one of the two cells tuned to ‘4’ in the simultaneous and sequential protocols Sequential protocolSimultaneous protocol Delay onset Delay period activity

9. Normalized responses averaged for neurons preferring the same sample quantity sequentialsimultaneous

10. Neural responses during the delay period sequentialsimultaneous Normalized averaged population responses

11. 3 separate populations encode numbers Number representation neurons Sequential counting neurons Simultaneous estimation neurons delaydelay samplesample

12. Our number perception tutorial lab

13. What’s on our menu? Simultaneous presentation More on the left side or on the right side? Answer as quickly as possible No counting! Non-symbolic numerosity estimation

14. what is our theoretical hypothesis? what is our operational hypothesis? What measurements can we extract? What are the possible confounding factors?