Using the techniques of both recording from neurons and ablation, researchers found that properties of the ventral and dorsal streams are established by two different types of cells in the retina, which transmit signals to different layers of the question 4 options:

Ganglion cells and Lateral geniculate nucleus.

- Ganglion cells: Also called ganglion neurons, are essential nerve cell for vision; they receive information from photoreceptors using bipolar, amacrine and horizontal intermediary neurons.
- Lateral geniculate nucleus: It is the primary processing center of the visual information received by the eye, in addition it is in charge of the regulation of the flow and intensity of the visual signals that are transmitted to the visual cortex.

Fossil found in strata reveal that unused body part decrease in size