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The dorsal nucleus of vagus nerve (or posterior nucleus of vagus nerve or dorsal vagal nucleus or nucleus dorsalis nervi vagi or nucleus posterior nervi vagi) [1] is a cranial nerve nucleus of the vagus nerve (CN X) situated in the medulla oblongata of the brainstem ventral to the floor of the fourth ventricle.
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 vagus is the longest nerve of the autonomic nervous system in the human body and comprises both sensory and motor fibers. The sensory fibers have their nuclei either in the jugular or the nodose ganglion, whereas the motor fibers come from neurons of the dorsal motor nucleus of the vagus and the nucleus ambiguus. [2]
Micrograph of the posterior portion of the open part of the medulla oblongata, showing the fourth ventricle (top of image) and the hypoglossal nucleus (medial - left of image) and the dorsal motor nucleus of the vagus nerve (lateral - right of image). H&E-LFB stain. Hypoglossal nucleus (XII) - motor; Dorsal motor nucleus of vagus nerve (X ...
The name dorsal-column medial lemniscus comes from the two structures that carry the sensory information: the dorsal columns of the spinal cord, and the medial lemniscus in the brainstem. There are three groupings of neurons that are involved in the pathway: first-order neurons, second-order neurons, and third-order neurons.
The sensory decussation or decussation of the lemnisci is a decussation (a crossing over) of axons from the gracile nucleus and cuneate nucleus, known together as the dorsal column nuclei. The dorsal column nuclei are responsible for fine touch , vibration, proprioception and two-point discrimination .
Dorsal cochlear nucleus, a cortex-like structure on the dorso-lateral surface of the brainstem; Dorsal nucleus of vagus nerve, a cranial nerve nucleus for the vagus nerve; Dorsal raphe nucleus; Lateral dorsal nucleus of thalamus; Medial dorsal nucleus of thalamus; Posterior thoracic nucleus (or dorsal nucleus), is a group of interneurons found ...
It is a motor center that relays inhibitory signals to the thalamus and basal nuclei preventing unwanted body movement. [ citation needed ] The tegmentum area includes various different structures, such as the rostral end of the reticular formation , several nuclei controlling eye movements, the periaqueductal gray matter, the red nucleus , the ...