This section passes through the central part (body) of the lateral ventricle.

The corpus callosum (CC) forms the roof of the lateral ventricle and the septum pellucidum is seen. The caudate nucleus (CH) is much smaller, the large mass medial to it is the thalamus - see the slitlike third ventricle. IC : Internal capsule.

The putamen (P) and the globus pallidus (GP) forming the lentiform nucleus are clear now. (Notice that the globus pallidus is further divided into two parts - globus pallidus internus and externus.) Observe the thin external capsule, claustrum and the extreme capsule in that order lateral to the lentiform nucleus, followed by the insula (Ins).

LS : Lateral sulcus.

The inferior (temporal) horn of the lateral ventricle is seen in the temporal lobe, with a anterior enlarged end of the hippocampus (pes hippocampi  : H) and the amygdala (Am). On the other side one sees the convolutions of the hippocampal formation.

The mamillary bodies are seen at 'M'.

This slice shows the transition between the diencephalon and the midbrain. "SN" is the substantia nigra. Note how the internal capsule condenses ventral to the substantia nigra, leading to the cerebral peduncles (the mamillary bodies are in the interpeduncular fossa, aren't they?). The nuclear mass S is the subthalamic nucleus.

CS is the cingulate sulcus, with the cingulate gyrus between it and the corpus callosum. Also note the tufts of the choroid plexus in the ventricles.