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The dorsal column nuclei each have an associated nerve tract in the spinal cord, the gracile fasciculus and the cuneate fasciculus, together forming the dorsal columns. Both dorsal column nuclei contain synapses from afferent nerve fibers that have travelled in the spinal cord. [2] They then send on second-order neurons of the dorsal column ...
The posterior thoracic nucleus is a major relay center for unconscious proprioception.Sensory information from muscle spindles and tendon organs is carried by axons of larger neurons in dorsal root ganglia, which synapse onto neurons in the spinal cord including the posterior thoracic nucleus.
The dorsal column nuclei are responsible for fine touch, vibration, proprioception and two-point discrimination. The fibers of this decussation are called the internal arcuate fibers and are found at the superior aspect of the closed medulla oblongata, superior to the motor decussation. Neurons of these nuclei are second-order neurons in the ...
The nuclei corresponding to the lemniscal territory are called VP. The tactile part nucleus ventralis posterior caudalis VPC is the posterior part of the lateral region, in front of the pulvinar. It is the addition of a lateral nucleus VPL and of the superior part of the classic arcuate nucleus VPM.
The medial dorsal nucleus (or mediodorsal nucleus of thalamus, dorsomedial nucleus, dorsal medial nucleus, or medial nucleus group) is a large nucleus in the thalamus. [ 1 ] [ 2 ] It is separated from the other thalamic nuclei by the internal medullary lamina .
The neurons in these two nuclei (the dorsal column nuclei) are second-order neurons. [6] Their axons cross over to the other side of the medulla and are now named as the internal arcuate fibers, that form the medial lemniscus on each side. This crossing over is known as the sensory decussation.
Some fibers project directly to the dorsal nucleus of vagus nerve, and autonomic nuclei of the spinal cord (hypothalamospinal fibers). [1] Descending projections of the DLF are functionally involved in mediating chewing, swallowing, [3] [2] salivation and gastrointestinal secretory function, [2] and shivering. [3]
Dorsal nucleus may refer to: Dorsal cochlear nucleus, a cortex-like structure on the dorso-lateral surface of the brainstem; Dorsal nucleus of vagus nerve, a cranial ...