![]() ![]() In the lateral part of the floor is an elevation called the collateral eminence, produced by inward bulging of the white mater which lies deep to the collateral sulcus. The floor of the inferior horn is formed mainly by the hippocampus, along with the alveus and fimbriae. Anteriorly, the tail of the caudate nucleus and the stria terminalis end in relation to the amygdaloid complex, which lies in the most anterior part of the roof. These structures are continuous into the roof of the inferior horn from the floor of the central part. The lateral part of the roof (lateral wall) is formed by fibres of the tapetum, while the medial part of the roof is formed by the tail of the caudate nucleus and the stria terminalis. Great job for tackling the tricky topic that is the lateral ventricles! Find out why active recall is so important in enabling you to remember it. Because of this orientation, the lateral part of the roof is sometimes referred to as the lateral wall, and the medial part of the floor, the medial wall. In cross section, the inferior horn has a narrow cavity which is bounded above, and laterally, by the roof, and below, and medially by the floor. The roof of the inferior horn is formed mainly by the tapetum of the corpus callosum and the cauda of the caudate nucleus. It has an anterior end that reaches close to the uncus of the cerebrum, a floor, and a roof. It begins at the posterior end of the central region, and runs anteroinferiorly into the temporal lobe. The inferior (temporal) horn is the largest component of the lateral ventricle. Inferior horn of lateral ventricle, Cornu inferius ventriculi lateralis Master the ventricular system anatomy and function with our study unit: The lateral ventricle has a body or central part and three extensions, namely the anterior, posterior and inferior horns. Thus, the lateral ventricles span the cerebrum, including the occipital, frontal and parietal lobes. The lateral ventricle, when viewed from the lateral aspects of the brain, has a roughly C–shaped profile which follows the arrangement and shape of each hemisphere. The CSF finally leaves the fourth ventricle through the foramen of Magendie and the foramina of Luschka to reach the subarachnoid space surrounding the brain.Įach lateral ventricle lies within a cerebral hemisphere. It then flows through the cerebral aqueduct into the fourth ventricle, and from there into the central canal starting just inferior to the fourth ventricle. However, the CSF is secreted by the choroid plexuses located within the lateral, third and fourth ventricles alone, but reaches the entire ventricular system and beyond by flowing from the lateral to the third ventricle through the foramen of Monro. This pia mater is directly opposed to the ependyma and forms the tela choroidea, which gives rise to the highly vascularised choroid plexuses. ![]()
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