Questions and Answers
Where do ganglion cell axons end?
In the lateral geniculate nucleus (LGN) of the thalamus
What is the major target of the optic tract?
Lateral geniculate nucleus (LGN) of the thalamus
How does the LGN segregate M and P Ganglion cell types?
Based on the intensity of the visual stimuli
What are the receptive fields (RFs) of LGN cells?
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Where do axons from the LGN go?
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How do ganglion cell axons form the optic tract?
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What does the LGN serve as?
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How is info from the optic tract taken in the LGN?
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Study Notes
Optic Tract and Lateral Geniculate Nucleus (LGN)
- Ganglion cell axons end in the lateral geniculate nucleus (LGN) and the superior colliculus.
- The major target of the optic tract is the LGN.
Lateral Geniculate Nucleus (LGN) and Ganglion Cell Types
- The LGN segregates M and P ganglion cell types by responding to different types of stimuli.
- M-ganglion cells project to magnocellular layers in the LGN and respond to low-contrast, fast-moving stimuli.
- P-ganglion cells project to parvocellular layers in the LGN and respond to high-contrast, slow-moving stimuli.
Receptive Fields (RFs) of LGN Cells
- LGN cells have circular receptive fields with center-surround organization.
LGN Outputs
- Axons from the LGN project to the primary visual cortex (V1) via the optic radiations.
Formation of the Optic Tract
- Ganglion cell axons form the optic tract by converging at the optic chiasm and projecting to the LGN and superior colliculus.
Function of the LGN
- The LGN serves as a relay station between the retina and the visual cortex, processing and transmitting visual information.
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