In the lateral geniculate body, axons from ganglion cells of the contralateral nasal retina terminate in which layers?
- A Layers 1, 4 and 6 ✓
- B Layers 2, 3 and 5
- C Layers 1 and 2 only
- D Layer 6 only
Correct answer: A. Layers 1, 4 and 6
Explanation
Crossed fibres from the nasal hemiretina end in layers 1, 4 and 6 of the lateral geniculate body, while uncrossed temporal retinal fibres end in layers 2, 3 and 5. Layers 1 and 2 are the magnocellular layers carrying motion and coarse form, and layers 3 to 6 are parvocellular. This six-layer lamination underlies the retinotopic segregation that continues into the optic radiations.
Reference: Gray's Anatomy for Students, 4th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.