What structure acts as a major pathway for visual information from the thalamus to the occipital lobe?

The optic radiation serves as the primary pathway through which visual information is transmitted from the lateral geniculate nucleus of the thalamus to the primary visual cortex located in the occipital lobe. This pathway is essential for vision as it carries processed visual signals that are necessary for perceiving sight and interpreting visual stimuli.

As visual information passes from the retina to the visual cortex, it first goes through the thalamus, where initial processing occurs. The optic radiation then relays these signals, making it critical for the integration of visual information. This structure consists of numerous fibers that fan out to connect the thalamic nuclei to the visual cortex, thus playing a vital role in the visual processing pathway.

The other structures mentioned do not primarily serve this function. The corpus callosum genu is involved in connecting the two hemispheres of the brain but does not specifically channel visual information. The primary visual cortex is the destination for visual processing rather than a pathway, while the primary motor cortex is responsible for the execution of voluntary motor actions and is unrelated to visual information transfer.