Which layers of the lateral geniculate body receive input from the contralateral retina?
- A Layers 1, 4 and 6 ✓
- B Layers 2, 3 and 5
- C Layers 1, 2 and 6
- D Layers 3, 4 and 5
Correct answer: A. Layers 1, 4 and 6
Explanation
The six-layered lateral geniculate body follows the rule that layers 1, 4 and 6 receive crossed fibres from the contralateral nasal hemiretina, while layers 2, 3 and 5 receive uncrossed fibres from the ipsilateral temporal hemiretina. Layers 1 and 2 are magnocellular and the remaining four are parvocellular. Option B simply states the ipsilateral complement, a common reversal error under exam pressure.
Reference: Gray's Anatomy, 42nd ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.