Which LGN layers receive input from the temporal retina?

Which LGN layers receive input from the temporal retina?

• A. Layers 2, 3, and 5.
• B. Layers 1, 4, and 6.
• C. Layers 2, 4, and 6.
• D. Layers 1, 2, and 3.

Answer: (A)

Temporal retina fibers stay on the same side after the optic chiasm, so they project to LGN layers that receive input from the ipsilateral eye. In primates, those layers are the second, third, and fifth layers. The layers that get input from the opposite eye — the contralateral input — are the first, fourth, and sixth layers. This arrangement preserves eye-specific information as signals move toward binocular processing in the cortex, helping to combine inputs from both eyes later in the visual pathway.

Temporal retina fibers stay on the same side after the optic chiasm, so they project to LGN layers that receive input from the ipsilateral eye. In primates, those layers are the second, third, and fifth layers. The layers that get input from the opposite eye — the contralateral input — are the first, fourth, and sixth layers. This arrangement preserves eye-specific information as signals move toward binocular processing in the cortex, helping to combine inputs from both eyes later in the visual pathway.