Here's a breakdown:
* Form: This is primarily detected by photoreceptor cells in the eye, specifically cones. Cones are responsible for color vision and detailed visual information, allowing us to perceive the shapes of objects.
* Motion: Motion is detected by a combination of photoreceptor cells (rods and cones) and specialized cells in the brain called motion-sensitive neurons. Rods are more sensitive to light and movement than cones, playing a crucial role in detecting motion. Motion-sensitive neurons in the visual cortex process information from the eye, allowing us to perceive movement.
Important Note: While we often talk about "form" and "motion" as separate things, they are processed together in the brain to create our perception of the world.
