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From Wikipedia, the free encyclopedia
The ventral posterior nucleus is the somatosensory relay nucleus in thalamus of the brain.[1]
| Ventral posterior nucleus | |
|---|---|
Thalamic nuclei: MNG = Midline nuclear group AN = Anterior nuclear group MD = Medial dorsal nucleus VNG = Ventral nuclear group VA = Ventral anterior nucleus VL = Ventral lateral nucleus VPL = Ventral posterolateral nucleus VPM = Ventral posteromedial nucleus LNG = Lateral nuclear group PUL = Pulvinar MTh = Metathalamus LG = Lateral geniculate nucleus MG = Medial geniculate nucleus | |
 Thalamic nuclei | |
| Details | |
| Part of | Thalamus |
| Identifiers | |
| Latin | Nucleus ventralis posterior |
| NeuroNames | 343 |
| NeuroLex ID | birnlex_1116 |
| Anatomical terms of neuroanatomy | |
The ventral posterior nucleus receives neuronal input from the medial lemniscus, spinothalamic tracts, and trigeminothalamic tract. It projects to the somatosensory cortex and the ascending reticuloactivation system.
The ventral posterior nucleus is divided into:
The ventral posterior nucleus has, by virtue of its afferent and efferent pathways, crucial relay and regulatory roles in touch, body position, pain, temperature, itch, taste, and arousal. Additionally, the VPN—and particularly the ventral intermediate nucleus of the VPN—have been implicated in the pathophysiology and modulation of oscillatory tremors as found in Parkinson's disease and essential tremor; accordingly, it is a target of deep brain stimulation in the treatment of such pathologies.[4] The posterior subthalamic area is suggested to be a better target than the VIM.[4]
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