The retina develops from which embryological region and contributes to which major functional system?

The retina develops from which embryological region and contributes to which major functional system?

• A. Telencephalon; visual system
• B. Mesencephalon; auditory system
• C. Rhombencephalon; somatosensory system
• D. Diencephalon (optic vesicle); visual system

Answer: (D)

The retina comes from the diencephalon, an early part of the forebrain, via the optic vesicles that bud from the diencephalon. These vesicles invaginate to form the optic cup, with the inner layer becoming the neural retina and the outer layer forming the retinal pigment epithelium. The retina stays connected to the brain by the optic nerve, sending visual information into the brain’s visual pathways. This is why it’s part of the visual system. The telencephalon forms the cerebral hemispheres, the mesencephalon becomes the midbrain, and the rhombencephalon gives rise to the hindbrain, so they don’t give rise to the retina for the visual system.

The retina comes from the diencephalon, an early part of the forebrain, via the optic vesicles that bud from the diencephalon. These vesicles invaginate to form the optic cup, with the inner layer becoming the neural retina and the outer layer forming the retinal pigment epithelium. The retina stays connected to the brain by the optic nerve, sending visual information into the brain’s visual pathways. This is why it’s part of the visual system. The telencephalon forms the cerebral hemispheres, the mesencephalon becomes the midbrain, and the rhombencephalon gives rise to the hindbrain, so they don’t give rise to the retina for the visual system.