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.
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