Functional Properties Architecture & Circuits V1 The Receptive - - PowerPoint PPT Presentation

▶
functional properties architecture circuits v1
SMART_READER_LITE
LIVE PREVIEW

Functional Properties Architecture & Circuits V1 The Receptive - - PowerPoint PPT Presentation

Feb 03, 2023 283 likes •601 views

Functional Properties Architecture & Circuits V1 The Receptive Fields & Emergent Properties V1 Layers, Cell Types, Circuits Columns, Modules or Functional Maps and Populations 300 m Magno 10% Parvo 80% Konio < 10% Total

slide-1
SLIDE 1

300 µm

Functional Properties Architecture & Circuits V1

The Receptive Fields & Emergent Properties V1 Layers, Cell Types, Circuits Columns, Modules or Functional Maps and Populations

slide-2
SLIDE 2

Magno – 10% Parvo – 80% Konio < 10% Total afferents > 1,000,000 per optic nerve

slide-3
SLIDE 3

consider V1 How are the inputs

  • rganized?

Is there segregation? Volume ~ 1,400 mm3 Density (neurons) ~ 200 x 103/mm3 Total neurons 280,000,000

slide-4
SLIDE 4

Hubel & Wiesel 1976

slide-5
SLIDE 5

LGN properties (primate)

Parvo/Magno/Konio distinctions R-G opponent/non-opponent/B- Y opponent SF tuning Low/High/? Achromatic Contrast gain Long/short/Long latency and integration times Sustained/transient/? – low/ bandpass TF tuning Selectivity Unselective for orientation, direction, spatial freq (SF), temp Freq (TF)

V1 properties

Selectivity Orientation, direction, SF, TF, size (eCRF), binocular disparity, chromatically double opponent Different populations with different degrees of selectivity along a range

  • f stimulus dimensions
slide-6
SLIDE 6

Functional Characterization

Layer 4c alpha Simple Cells

slide-7
SLIDE 7

Functional Characterization

Layer 6 DS Complex Cell

slide-8
SLIDE 8

RF Maps, orientation, SF and TF tuning: simple cells in layer 4b

slide-9
SLIDE 9

Maps, SF and Orientation Tuning for Single Color Opponent Neuron from L6 Johnson et al 2008

slide-10
SLIDE 10

Johnson et al 2008

O/P ratio 0.2

Maps, SF and Orientation Tuning for Double Color Opponent Neuron from L6

slide-11
SLIDE 11

Disparity Selectivity of Neurons in Monkey V1, V2, MT & MST : from Parker 2007 Disparity Selectivity of Neurons Cat Area 17 : from Barlow, Blakemore and Pettigrew 1967

slide-12
SLIDE 12
  • CRF: orientation, spatial frequency, temporal frequency, direction, contrast, color, size --

area

  • eCRF: modulates the CRF responses -- influence that is the CONTEXT

Blakemore & Tobin

Allman et al DeAngelis, Ozhawa, Freeman Knierim & Van Essen Sengpiel et al Lamme, Ziper et al Cavanaugh et al . Williford & von der Heydt (2013)

  • What is the relationship to perception?
  • Relationship to normalization and attention
  • Feedback and modulation in population coding and modeling
slide-13
SLIDE 13

From DeFelipe, 2005

slide-14
SLIDE 14
  • Laminar organization of cortex
  • Ocular Dominance
  • Cell Types, excitatory, inhibitory
  • Circuits and projections

Layers, Columns, Cell Types and Circuits

slide-15
SLIDE 15

300 µm

slide-16
SLIDE 16

CO blobs and stripes (Sincich & Horton 2005)

V2

  • V1

thick thin inter

slide-17
SLIDE 17

Intracolumnar feedforward and feedback connections (Sincich & Horton 2005)

slide-18
SLIDE 18

Federer et al 2013 Projections from V1 to V2 in primate

slide-19
SLIDE 19

Segregated color selective inputs (from Chatterjee & Callaway, 2003)

slide-20
SLIDE 20

Tripartite view of V1--V2 (Livingstone-Hubel)

slide-21
SLIDE 21

The canonical cortical micro- circuit

from Martin & Douglas 2010

slide-22
SLIDE 22

Radial and Lateral connections (from Lund et al 2003)

slide-23
SLIDE 23

Layer 4cβ projections

slide-24
SLIDE 24

Layer 4cα projections

slide-25
SLIDE 25

Lateral connections in layer 2/3

slide-26
SLIDE 26

Layer 2 projections

From Wiser & Callaway 1996

Layer 5 projections

slide-27
SLIDE 27

Layer 6 Classes and projections

slide-28
SLIDE 28

From Rudy et al 2010

slide-29
SLIDE 29

Inhibitory interneurons in Primate V1 From Defelipe 1999

slide-30
SLIDE 30