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Sensory System
Published in Peter Kam, Ian Power, Michael J. Cousins, Philip J. Siddal, Principles of Physiology for the Anaesthetist, 2020
Peter Kam, Ian Power, Michael J. Cousins, Philip J. Siddal
The thalamic nuclei are the main somatosensory relay nuclei. The ventral posterolateral nucleus of the thalamus is important for nociceptive stimuli. The other thalamic nuclei are involved in arousal, changes in affect, and learning and memory.
The Spinal Cord and the Spinal Canal
Published in Bernard J. Dalens, Jean-Pierre Monnet, Yves Harmand, Pediatric Regional Anesthesia, 2019
Bernard J. Dalens, Jean-Pierre Monnet, Yves Harmand
The lateral spinothalamic tract consists of fibers originating in contralateral laminae VI, VII, and VIII of Rexed where they relay fibers from the dorsal roots before crossing the spinal cord in the anterior commissure. Fibers from the lower part of the body are located more posteriorly and laterally, while those issuing from the upper part are anterior and medial. This tract (Figure 1.27) conveys impulses from cutaneous nociceptors and cold and heat receptors to the ventral posterolateral nucleus of the thalamus and to some intralaminar nuclei.
Discussions (D)
Published in Terence R. Anthoney, Neuroanatomy and the Neurologic Exam, 2017
As examples of narrow definitions of the posterior nuclear group, a few authors include only a part of the ventral posterior nucleus: Martinez Martinez includes only the ventral posterior inferior nucleus (1982, p. 222 [Fig. 33–3p, and FitzGerald includes only “the posterior ends of the VPL [ventral posterolateral nucleus] and VPM [ventral posteromedial nucleus]” (1985, p. 121). Note that even these two narrow definitions differ from each other.
Assessing lesion location, visual midline perception and proprioception may assist outcome predictions for people affected by lateropulsion
Published in Disability and Rehabilitation, 2023
Proprioceptive inputs travel via the dorsal column – lateral lemniscus system, to the ventral posterolateral nucleus of the thalamus, the site of multimodal integration with the vestibular system. From there, proprioceptive inputs travel to the primary sensorimotor cortex, dorsal premotor cortex and supramarginal gyrus, especially the non-dominant supramarginal gyrus [8]. The latter is also the cortical destination of vestibular inputs [9], allowing for additional multimodal sensory processing at this location. Some proprioceptive inputs travel via alternate routes to the cerebellum [9], which may also contribute to the high incidence of lateropulsion associated with cerebellar lesions [7].
Incisionless MR-guided focused ultrasound: technical considerations and current therapeutic approaches in psychiatric disorders
Published in Expert Review of Neurotherapeutics, 2020
Thomas Kinfe, Andreas Stadlbauer, Klemens Winder, Rene Hurlemann, Michael Buchfelder
It is noteworthy, that frequency represents one of several variables relevant for the delivered amount of energy (e.g. mechanical index, thermal index, spatial-peak-pulse intensity and temporal-peak-pulse intensity). Contrary to HIFU/LIFU using multiple elements, Legon and colleagues investigated the effects of a single-element focused ultrasound approach on the sensory property of the thalamus (ventral posterolateral nucleus; VPL) and observed physiologic and behavioral changes quantified by electrophysiological means (somato-sensory evoked potential) in healthy volunteers [51].