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Layer-Specific Attentional Modulation in Early Visual Areas

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Presentation on theme: "Layer-Specific Attentional Modulation in Early Visual Areas"— Presentation transcript:

1 Layer-Specific Attentional Modulation in Early Visual Areas
Elizabeth A. Buffalo Laboratory of Neuropsychology National Institute of Mental Health, NIH

2 Attentional Modulation in Area V4
Fries, Reynolds, Rorie, and Desimone (Science, 2001)

3 V4 Unattended stimulus v2 v2 Attended stimulus pp V2 V4 V1 TEO TE

4 Spatial Attention Task
Response/Reward 1 1 1 1 fix RF RF RF RF 1.0s s

5

6

7 Electrode Path Modified from Gegenfurtner, Kiper, and Levitt (1997)

8 Superficial Recording
Deep Recording

9 Electrode Path Modified from Gegenfurtner, Kiper, and Levitt (1997)

10 Attentional Modulation in Area V2
Superficial Layers

11 Attentional Modulation in Area V2
Deep Layers

12

13 Area V1 Area V2 Superficial Layers Deep Layers

14 Superficial Layers Deep Layers

15 Cortical Circuitry

16 Cortical Circuitry Feedforward intracortical connections V1 (II/III) to V2 (IV)

17 Cortical Circuitry Feedforward intracortical connections V1 (II/III) to V2 (IV) Feedback intracortical and subcortical connections V2 (VI) to V1 (VI) V1 (V) to SC, V1 (VI) to LGN, V2 (V) to SC, Pons, Striatum

18 Gamma-frequency synchronization:
Superficial Layers Gamma-frequency synchronization: Attention V2 pfc V4 V1 TEO TE

19 Superficial Layers Deep Layers V2 V2 pfc pfc V1 V4 V1 TEO TEO TE TE
Gamma-frequency synchronization: Attention Deep Layers Beta-frequency synchronization: ??? V2 V2 pfc pfc V1 V4 V1 TEO TEO TE TE Superior Colliculus, Striatum, Pons, LGN

20 Beta-frequency Oscillations
Baker, Kilner, Pinches, and Lemon (1999)

21 Synchronization correlated with behavioral response
Superficial Layers Deep Layers

22 Synchronization correlated with behavioral response
Superficial Layers Deep Layers

23 Superficial Layers Deep Layers V2 V2 pfc pfc V1 V4 V1 TEO TEO TE TE
Gamma-frequency synchronization: Attention Deep Layers Beta-frequency synchronization: Motor response inhibition? V2 V2 pfc pfc V1 V4 V1 TEO TEO TE TE Superior Colliculus, Striatum, Pons, LGN

24 Superficial Layers: Coherence Across Time

25 Deep Layers: Coherence Across Time

26 Cortical Circuitry Higher Cortical Areas LGN SC

27 Cortical Circuitry Higher Cortical Areas Inhibitory LGN Interneurons
SC

28 Collaborators Robert Desimone Pascal Fries Tim Buschman David Heister
Partha Mitra

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