Meyer's Loop is associated with which brain lobe?

Meyer's Loop is associated with which brain lobe?

• A. Temporal lobe
• B. Parietal lobe
• C. Frontal lobe
• D. Occipital lobe

Answer: (A)

Meyer's loop refers to the inferior optic radiations that loop forward into the temporal lobe on their way from the lateral geniculate nucleus to the primary visual cortex in the occipital lobe. Since this portion of the radiations travels through the temporal lobe, Meyer's loop is associated with the temporal lobe. Clinically, a lesion in this loop produces contralateral superior quadrantanopia—the classic “pie in the sky” defect—because it interrupts fibers carrying the superior visual field. By comparison, the superior optic radiations travel through the parietal lobe and lesions there cause contralateral inferior quadrantanopia, while the primary visual processing occurs in the occipital cortex.

Meyer's loop refers to the inferior optic radiations that loop forward into the temporal lobe on their way from the lateral geniculate nucleus to the primary visual cortex in the occipital lobe. Since this portion of the radiations travels through the temporal lobe, Meyer's loop is associated with the temporal lobe. Clinically, a lesion in this loop produces contralateral superior quadrantanopia—the classic “pie in the sky” defect—because it interrupts fibers carrying the superior visual field. By comparison, the superior optic radiations travel through the parietal lobe and lesions there cause contralateral inferior quadrantanopia, while the primary visual processing occurs in the occipital cortex.