part of start stage end stage brain choroidal fissure ZFA:0001075 The narrow cleft along the medial wall of the lateral ventricle along the margins of which the choroid plexus is attached; it lies between the upper surface of the thalamus and lateral edge of the fornix in the central part of the ventricle and between the terminal stria and fimbria hippocampi in the inferior horn. zebrafish_anatomy TAO:0001075 choroidal fissures anatomical space pharyngula:prim-5 adult