Anterior horn of lateral ventricle is closed anteriorly by the genu and rostrum of corpus callosum.Lateral ventricleTwo lateral ventricles are the cavities of cerebral hemisphere (one in each hemisphere). Each lateral ventricle communicates with third ventricle through interventricular foramen of Monro.It is divisile into four pas :?1) Central pa (body) : It is located in the medial pas of frontal and parietal lobes. It extends from interventricular foramen (of Monro) in front to splenium of corpus callosum behind. It has choroid plexus. It has :- o Roof : Formed by corpus callosum.Floor : Formed form lateral to medial by caudate nucleus (body), stria terminalis, thalamostriate vein, and lateral pa of upper surface of thalamus.Medial wall (paition between two lateral ventricles) : By septum pellucidum and body of fornix.2) Anterior horn : It lies in front of interventricular foramen of Monro extending into the frontal lobe. It has no choroid plexus. Its bondries are :-Anterior : Posterior surface of genu and rostrum of corpus callosum.Roof : Anterior pa of trunk of corpus callosum.Floor : Head of caudate nucleus and upper surface of rostrum of corpus callosum.Medial (paition) : Septum pellucidum and column of fornix.3) Posterior horn : It lies behind splenium of corpus callosum and extends into occipital lobe. It may be variable in size (may be absent). It has no choroid plexus. Its boundries are :-Floor and medial wall : Bulb of posterior horn raised by forceps major and calcar avis, an elevation raised by calcarine sulcus (anterior pa).Roof and lateral wall : Tapetum4) Inferior horn : It is the largest horn and extends into temporal lobe. It has choroid plexus. Its boundries areRoof and lateral wall : Tapetum, tail of caudate nucleus, stria terminalis and amygdaloid body.Floor : Collateral eminence (elevation by collateral sulcus) and hippocampus medially.