3D Models Related Images

Meyer’s Loop, Hippocampus and Amygdala

Surgical Correlation


Meyer’s loop, hippocampus and amygdala.  Much of the lateral temporal lobe have been removed in this dissection to reveal the underlying medial temporal structures. The hippocampal head is visible in the anteromedial wall and floor of the temporal horn of the lateral ventricle. Anterior and medial to the hippocampus lies the amygdala.  The massive optic radiation is visible in the inferior part of the cerebrum as it runs from the lateral geniculate nucleus of the thalamus (not visible in this dissection) to the primary visual cortex located on the medial surface of the occipital lobe.  Fibers in the optic radiation that carry information from the superior half of the visual field course forward into the temporal lobe for a short distance as “Meyer’s loop."  The latter fibers then reverse direction and course caudally, lateral to the temporal horn of the lateral ventricle, within the inferior part of the optic radiation. (Image courtesy of PA Rubino)