Vision- LGN and V1 Flashcards
(20 cards)
Where do the optic nerves cross over?
Optic chiasm
What is partial desiccation?
half of the fibres from each optic nerve don’t cross over, the other half do
What does the optic nerve become after crossing over?
Optic tract
Where is the first synapse of the optic tract?
The lateral geniculate nucleus in the thalamus
Vision from the left hemisphere will go to which side of the retina and brain?
The right
How many layers does the LGN have?
6
Which layers receive inputs from the contralateral eye?
1, 4 and 6
Which layers receive inputs from the ipsilateral eye?
2, 3 and 5
Which layers of the LGN do P cells project to?
3-6
Which layers of the LGN do M cells project to?
1 and 2
What Brodmann’s area is V1?
17
How many layers are there of the visual cortex?
6
Which layer of the cortex is prominent and subdivided?
4
What are the subdivisions of layer 4?
Layer 4a, 4b and 4c
Which division of layer 4 is further subdivided?
4C
What are the divisions of 4C?
4C alpha and 4C beta
What is the stripe of Gennari?
Band of myelinated axons projecting from layer 4B to 4C-alpha
Which layer of V1 do P cell layers of LGN project to?
4C-beta
Which layer of V1 do M cell layers of LGN project to?
4C-alpha
Where do K cells in LGN project to in V1?
Cytochrome blobs in layer 3
