What is the ganglion cell complex?

• A. The photoreceptor layer and bipolar cells.
• B. The bipolar cells and amacrine cells.
• C. The ganglion cell complex comprises the final output neurons of the retina, collecting information from bipolar and amacrine cells.
• D. The inner nuclear layer.

Answer: (C)

The main idea is that the ganglion cell complex represents the retinal layers that contain the final output neurons and their direct inputs. It includes the nerve fiber layer (the axons of ganglion cells), the ganglion cell layer (the cell bodies), and the inner plexiform layer (where ganglion cells receive synapses from bipolar cells and are modulated by amacrine cells). This means the complex embodies the pathways that actually send signals from the retina to the brain.

So, describing it as the final output neurons of the retina, collecting information from bipolar and amacrine cells, fits perfectly. The other options point to parts of the retina that don’t involve the ganglion cells and their axons, such as the photoreceptors with bipolar cells (outer retina) or the inner nuclear layer (which contains bipolar and amacrine cell bodies but not the ganglion cells themselves).