Search results
Results from the WOW.Com Content Network
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 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 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 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.
VPC receives axons from the dorsal column nuclei located in the lower medulla oblongata: the nucleus gracilis (Goll) medial and the nucleus cuneatus (Burdach) lateral. Starting from these nuclei, axons go ventralwards and decussate (to the other side) still in the medulla oblongata forming the "lemniscal 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]
The spinal trigeminal nerve nuclei which contains the general somatic afferent column. The cochlear and vestibular nuclei, which contain the special somatic afferent column. The inferior olivary nucleus, which relays to the cerebellum. The dorsal column nuclei, which contain the gracile and cuneate nuclei. Basal plate neuroblasts give rise to:
Dorsal accessory olivary nucleus (DAO) – This nucleus also is a curved lamina. It is the smallest nucleus in the IO and is behind the PO. [6] The DAO receives signals from the spinal cord and the dorsal column nuclei. [6] The DAO synapses with vermis. [6]