Thalamencephalon

Thalamencephalon (), also called thalamic region (') or thalamic complex (') is a complex structure comprising thalamus (in the wider sense of the term "thalamus", i.e. dorsal thalamus, or thalamus proper, plus subthalamus, or ventral thalamus) and several adjacent structures: epithalamus and metathalamus.
The thalamencephalon is phylogenetically younger part of the diencephalon than the hypothalamus and neurohypophysis, which are not considered to belong to the thalamencephalon.