As part of the subcortical visual system , neurons within the pretectal nuclei respond to varying intensities of illuminance .
As part of the subcortical visual system , neurons within the pretectal nuclei are primarily involved in mediating non-conscious behavioral responses to acute changes in light .
As part of the subcortical visual system , neurons within the pretectal nuclei respond to varying intensities of illuminance and are primarily involved in mediating non-conscious behavioral responses to acute changes in light .