Which layer contains the photoreceptor cell bodies?

Which layer contains the photoreceptor cell bodies?

• A. Outer Nuclear Layer (ONL)
• B. Inner Nuclear Layer (INL)
• C. Ganglion Cell Layer (GCL)
• D. Nerve Fiber Layer (NFL)

Answer: (A)

Photoreceptors (rods and cones) have their cell bodies housed in the Outer Nuclear Layer. This layer specifically contains the nuclei of the photoreceptor cells, while their light-absorbing outer segments sit adjacent to the retinal pigment epithelium, separated by the outer limiting membrane. The connections to other neurons happen in the nearby outer plexiform layer. Meanwhile, the inner nuclear layer holds the cell bodies of bipolar, horizontal, amacrine, and Müller cells; the ganglion cell layer contains ganglion cell bodies; and the nerve fiber layer contains the axons of those ganglion cells. So, the layer with photoreceptor cell bodies is the Outer Nuclear Layer.

Photoreceptors (rods and cones) have their cell bodies housed in the Outer Nuclear Layer. This layer specifically contains the nuclei of the photoreceptor cells, while their light-absorbing outer segments sit adjacent to the retinal pigment epithelium, separated by the outer limiting membrane. The connections to other neurons happen in the nearby outer plexiform layer. Meanwhile, the inner nuclear layer holds the cell bodies of bipolar, horizontal, amacrine, and Müller cells; the ganglion cell layer contains ganglion cell bodies; and the nerve fiber layer contains the axons of those ganglion cells. So, the layer with photoreceptor cell bodies is the Outer Nuclear Layer.