subthalamusn.
/ˌsʌbˈθaləməs/, U.S. /ˌsəbˈθæləməs/ Anatomy.
Originally: the subthalamic nucleus (now rare). In later use: a region at the base of the forebrain located between the dorsal thalamus and the hypothalamus, containing the subthalamic nucleus, several other nuclei, and tracts of fibres; the ventral thalamus.
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subthalamus1892
1892 C. L. Dana Text-bk. Nerv. Dis. xvi. 302 The subthalamus (Luy's [sic] body) lies more dorsally, but in about the same plane as the substantia nigra.
1917 Jrnl. Compar. Neurol. 28 279 The commissure of Meynert clearly contains a decussation related on one side with the body of Luys in the subthalamus (pars ventralis thalami).
1974 D. Webster & M. Webster Compar. Vertebr. Morphol. xi. 261 Just ventral to the dorsal thalamus is the ventral thalamus (sometimes called the subthalamus), which is primarily concerned with somatic motor functions.
2008 O. Quarrell Huntington's Dis.: Facts (ed. 2) ix. 100 In other situations, damage to the subthalamus results in extra movements.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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