d7c2b0wpljtwf.cloudfront.net_var_ezwebin_site_storage_images_media_images_e-anatomy_brain-human-anatomy-diagram_corpus-callosum-gross-anatomy-fornix-septum-pellucidum-en_2637418-1-eng-gb_corpus-callosum-gross-anatomy-fornix-septum-pellucidum-en_medical512.jpg The choroid plexus is attached medially to the body of the fornix by the taenia fornicis and laterally to the thalamus by the taenia choroidea.