Lamina Affixa, Posterior View

Description

Posterior orientation toward the ventricular atrium and posterior horn frames the lamina affixa as a thin ependymal-meningeal sheet apposed to the superior surface of the thalamus, where it blends medially with the taenia thalami and continues into the roof of the third ventricle. Along its medial margin, the stria terminalis tracks in the thalamostriate groove, coursing posteriorly toward the amygdaloid complex, while the choroidal fissure lies just lateral to the attachment line of the choroid plexus. Calcar avis and collateral eminence can be inferred deep to the posterior horn neighborhood, with the hippocampal tail curving superiorly and posteriorly toward the atrium. Small structure, tight real estate. A posterior view matters because most learners miss how the lamina affixa and choroidal fissure set the operative corridor into the lateral ventricle, and how the stria terminalis marks the boundary between thalamus (medial) and caudate nucleus (lateral) as you move toward the atrium. In temporal horn surgery and endoscopic ventricular work, the safest plane for opening the choroidal fissure depends on recognizing the taeniae and keeping the internal cerebral veins and choroidal arteries protected at the roof; confusing these layers risks venous injury or misidentifying the fornix near the hippocampal formation. This view supports ventricular anatomy teaching because it ties a named lamina to practical landmarks rather than treating it as a trivia term. Neuroanatomy courses, neurosurgical atlases, and radiology teaching files can pair this plate with coronal MRI through the atrium to help readers map the lamina affixa and stria terminalis to the choroid plexus and hippocampal tail. It also fits board-style questions on ventricular boundaries and limbic pathways in adult male brain anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.