What does the VPL of the thalamus do?
What does the VPL of the thalamus do?
nucleus of the thalamus that receives sensory input from the medial lemniscus and spinothalamic tract and projects to the somatosensory cortex.
What is the most lateral nucleus of the thalamus?
lateral geniculate nucleus
The lateral geniculate nucleus is located within the lateral geniculate body, an ovoid projection of the posterior aspect of the thalamus. The lateral geniculate nucleus represents the thalamic relay station of the visual pathway. The nucleus consists of six to eight laminae, which are separated by interlaminar zones.
What is different about the reticular thalamic nucleus?
The thalamic reticular nucleus receives input from the cerebral cortex and dorsal thalamic nuclei. This is the only thalamic nucleus that does not project to the cerebral cortex, instead it modulates the information from other nuclei in the thalamus.
What is ventral posterior nucleus of thalamus?
The ventral posterior nucleus, sometimes called the ventrobasal complex, is a wedge-shaped cell group located caudally in the thalamus. The ventral posterior nucleus is composed of the laterally located VPL and the medially located ventral posteromedial nucleus (VPM).
What goes to VPM of thalamus?
The VPM receives input via the nucleus caudalis and the principal trigeminal nucleus. The medial thalamus, including the intralaminar nuclei, receives direct spinothalamic and spinoreticular thalamic projections.
What is the function of the medial geniculate body?
The medial geniculate body is the major auditory nucleus of the thalamus. Parts of the medial geniculate are hypothesized to function in directing auditory attention.
How many nucleus does the thalamus have?
The thalamus serves as the main relay station for the brain. Motor pathways, limbic pathways, and sensory pathways besides olfaction all pass through this central structure. The thalamus can divide into approximately 60 regions called nuclei.
What does the thalamic reticular nucleus do?
The activity of the GABAergic neurons of the thalamic reticular nucleus (TRN) has long been known to play important roles in modulating the flow of information through the thalamus and in generating changes in thalamic activity during transitions from wakefulness to sleep.
What does the pulvinar nucleus do?
The pulvinar nucleus of the thalamus, for example, is involved in filtering or suppressing irrelevant stimuli in a cluttered display. However, the cortical region that plays the most significant role in the control of spatial attention is the posterior parietal region.
Which thalamic nucleus is most important for relaying somatosensory information from the face?
The VPL and VPM are the primary thalamic relays for somatic sensory, i.e., nociceptive and tactile/kinestetic, information from the body and the head, respectively.
What is the function of medial geniculate body?
The medial geniculate body (MGB) is a complex of nuclei that receive massive input from the IC and thus serve as major synaptic stations in the pathways for information reaching auditory areas of cerebral cortex.
Where is the ventral posterior nucleus located in the thalamus?
The ventral posterior nucleus, sometimes called the ventrobasal complex, is a wedge-shaped cell group located caudally in the thalamus. Its lateral border abuts the internal capsule, and ventrally it borders on the external medullary lamina.
Where is the neothalamus located in the thalamus?
The neothalamus or lateral thalamus rests at the ventrobasal portion of the thalamus. The neothalamus, unlike the paleothalamus, is organized somatotopically and subdivided into the ventral posterolateral nucleus and the ventral posteromedial nucleus.
What is the function of the ventral posteromedial nucleus?
Collectively VPL and VPM project somatotopically upon the primary somesthetic cortex with a modality segregation. The ventral posteromedial nucleus of the thalamus is the principal structure for conveying nociceptive information from trigeminovascular neurons to higher cortical regions (Noseda et al., 2011 ).
How is the thalamus related to the cerebral cortex?
The thalamus is a heterogeneous assembly of well-organized nuclei, which receives and processes sensory and motor input signals and has reciprocal connections with the cerebral cortex. It transmits the sensory information to the cortex and is involved in motor, arousal, and mood functions.