What path do visual stimuli take after retinal transduction?

What path do visual stimuli take after retinal transduction?

• A. Directly to the primary visual cortex.
• B. To the superior colliculus first.
• C. Through the optic nerve to the LGN and then to the primary visual cortex.
• D. To the thalamus then cerebellum.

Answer: (C)

Visual signals from the retina are carried by retinal ganglion cell axons that form the optic nerve. After crossing at the optic chiasm, most fibers reach the lateral geniculate nucleus (LGN) of the thalamus. From the LGN, signals travel through the optic radiations to the primary visual cortex in the occipital lobe, where initial cortical processing of visual information occurs. This thalamic relay to V1 is the main pathway for conscious visual perception. There is also a separate route to the superior colliculus for rapid orienting, but the canonical route to cortex is via the LGN to the primary visual cortex.

Visual signals from the retina are carried by retinal ganglion cell axons that form the optic nerve. After crossing at the optic chiasm, most fibers reach the lateral geniculate nucleus (LGN) of the thalamus. From the LGN, signals travel through the optic radiations to the primary visual cortex in the occipital lobe, where initial cortical processing of visual information occurs. This thalamic relay to V1 is the main pathway for conscious visual perception. There is also a separate route to the superior colliculus for rapid orienting, but the canonical route to cortex is via the LGN to the primary visual cortex.