Temporal Horn Of The Human Brain, Anatomy

Description

Temporal horn of the lateral ventricle occupies the anteroinferior (temporal) extension of the ventricular system, coursing within the medial aspect of the temporal lobe. Its cavity is framed superiorly by the tail of the caudate nucleus and the stria terminalis, while the floor and medial wall are formed by the hippocampal formation, including the hippocampus proper and its fimbria along the ventricular margin. Anteriorly, the horn tapers toward the amygdaloid region near the uncus, and posteriorly it continues toward the atrium of the lateral ventricle. Choroid plexus commonly lines the choroidal fissure along the superomedial roof. Tight anatomy. For teaching, the temporal horn is where ventricular anatomy stops being abstract and becomes surgical, because its boundaries are defined by structures that matter in epilepsy surgery and memory circuitry. The relationship of the temporal horn to the hippocampus and amygdala underpins medial temporal lobe approaches for anterior temporal lobectomy or selective amygdalohippocampectomy, where staying oriented to the ventricular cavity helps avoid injury to adjacent white matter pathways. Radiologically, attention to temporal horn caliber aids recognition of hydrocephalus patterns and early ex vacuo dilatation with hippocampal atrophy, and the fixed perspective supports direct correlation with coronal and axial MRI slices that intersect the inferior horn. Neuroanatomy instructors can place this illustration beside sectional brain specimens when introducing the lateral ventricles, hippocampal formation, and choroid plexus in a single spatial unit. Medical publishers and clinical educators will also find it well suited for neuroradiology primers on ventricular landmarks, and for neurosurgical materials discussing transsylvian and transcortical corridors to mesial temporal pathology, including intraventricular hemorrhage or tumor extension into the temporal horn. Anatomical accuracy verified by SciePro's Medical Advisory Board.