Which statement best describes the path of LGN output to the primary visual cortex?

Which statement best describes the path of LGN output to the primary visual cortex?

• A. LGN output travels directly to the prefrontal cortex.
• B. LGN output is transmitted to the primary visual cortex via the optic radiation.
• C. LGN output feeds back to the retina.
• D. LGN output goes to the primary auditory cortex.

Answer: (B)

Visual information flows from the lateral geniculate nucleus to the primary visual cortex through the optic radiations, also called the geniculocalcarine tract. This white-matter pathway carries the relay from LGN to the calcarine (striate) cortex in the occipital lobe, establishing the retinotopic map in V1. While there are feedback connections from cortex to LGN, the main output driving the primary visual cortex is via the optic radiations. The other options describe incorrect targets or directions (e.g., to prefrontal or auditory cortex, or back to the retina), so the optic radiations route best captures the actual path.

Visual information flows from the lateral geniculate nucleus to the primary visual cortex through the optic radiations, also called the geniculocalcarine tract. This white-matter pathway carries the relay from LGN to the calcarine (striate) cortex in the occipital lobe, establishing the retinotopic map in V1. While there are feedback connections from cortex to LGN, the main output driving the primary visual cortex is via the optic radiations. The other options describe incorrect targets or directions (e.g., to prefrontal or auditory cortex, or back to the retina), so the optic radiations route best captures the actual path.