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The part of the diencephalon comprising the thalamus and its associated structures.

thal′a·men′ce·phal′ic (-sə-făl′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -lons or -la (-lə)
1. (Anatomy) the part of the diencephalon of the brain that includes the thalamus, pineal gland, and adjacent structures
2. (Anatomy) another name for diencephalon
thalamencephalic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The BPD was measured from the outer edge of the parietal bone near the probe to the inner edge of the other side of the parietal bone in the thalamencephalon. HC was measured in the same location as the BPD using the elliptic function of the ultrasound instrument.
Most PET, fMRI and MRS studies have consistent results: the cerebral metabolism and activation in the prefrontal cortex, striatum and thalamencephalon are increased in patients with OCD and are correlated with patients' cognitive functioning, with the severity of their symptoms, and with the duration of their illness.