dorsal thalamus

dor·sal thal·a·mus

the large part of the diencephalon located dorsal to the hypothalamus and excluding the subthalamus and the medial and lateral geniculate bodies (sometimes the latter two are collectively called the metathalamus); the dorsal thalamus includes the major motor and somatosensory relay nuclei, nuclei that project to association areas, and the intralaminar nuclei.
See also: thalamus.
References in periodicals archive ?
The results of brain MRI scan showed symmetric increased T1 and T2 signals in the medial dorsal thalamus, hypothalamus, and periaqueductal region [Figure 1]a.
24] Recently, this research team [25] used an automated extraction method (which is more efficient that the ROI method) in patients with OCD and found decreased blood flow in the left inferior temporal lobe, supramarginal gyrus, transverse temporal gyrus, outer dorsal nuclei, outer posterior nucleus, intercalated nucleus, and increased blood flow in the left superior parietal lobule, and the dorsal thalamus.
The entopallium, which is shown in Figure 2, is one such subregion, and it receives the ascending visual inputs relayed from the optic tectum (the avian counterpart of the mammalian superior colliculus) through the dorsal thalamus.
The dorsal and ventral striatopallidal complexes each project to part of the dorsal thalamus and are involved in similar circuitry, with the dorsal striatopallidal complex being more involved in somatic functions and the ventral complex more in limbic-related ones.
The so-called direct loop of cortex to dorsal striatum to globus pallidus to dorsal thalamus and back to cortex is a circuit that promotes the initiation of movement, while a second circuit that additionally involves the subthalamic nucleus, the so-called indirect loop, inhibits movement (Buchel et al.
1997), and projects to various parts of the dorsal thalamus (Benowitz and Karten, 1976; Mpodozis et al.
As in mammals, the dorsal and ventral pallida each project to part of the dorsal thalamus and are involved in similar circuitry, with the dorsal striatum and pallidum being more involved in somatic functions and the ventral striatum and pallidum in limbic-related ones.
Thus both the so-called direct loop of pallial regions to dorsal striatum to globus pallidus to dorsal thalamus and back to pallium, a circuit that promotes the initiation of movement, and the so-called indirect loop, which involves the subthalamic nucleus and inhibits movement, are present in birds.
Both similarities and differences exist in the organization of the dorsal thalamus.
The medial pallium is the main ascending target of projections from the rostral part of the dorsal thalamus (Northcutt and Kicliter, 1980), which does not receive direct retinal input but rather inhibitory input from ventral thalamic, retinorecipient cell groups (Roth et al.
The evolution of the dorsal thalamus of jawed vertebrates, including mammals: cladistic analysis and a new hypothesis.
Magnetic renounce imaging showed an abnormal signal of left occipital lobe, dorsal thalamus, and partial insular [Figure 1].

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