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The nucleus ambiguus ("ambiguous nucleus" in English) is a group of large motor neurons, situated deep in the medullary part of the reticular formation named by Jacob Clarke. [1] The nucleus ambiguus contains the cell bodies of neurons that innervate the muscles of the soft palate , pharynx , and larynx which are associated with speech and ...
The spinal accessory nucleus lies within the cervical spinal cord (C1-C5) in the posterolateral aspect of the anterior horn. The nucleus ambiguus is classically said to provide the "cranial component" of the accessory nerve .
The solitary nucleus (SN) (nucleus of the solitary tract, nucleus solitarius, or nucleus tractus solitarii) is a series of neurons whose cell bodies form a roughly vertical column of grey matter in the medulla oblongata of the brainstem. Their axons form the bulk of the enclosed solitary tract. The solitary nucleus can be divided into different ...
Cell bodies of pre-ganglionic parasympathetic neurons of CN X that innervate the heart meanwhile reside in the nucleus ambiguus, and additional cell bodies of the nucleus ambiguus give rise to the branchial efferent motor fibers of the vagus nerve (CN X) terminating in the laryngeal, and pharyngeal muscles, and musculus uvulae muscle.
The solitary nucleus is the end-point for sensory information arriving from the pontine respiratory group, and from two cranial nerves – the vagus nerve, and the glossopharyngeal nerve. The solitary nucleus sends signals to the respiratory center from peripheral chemoreceptors , baroreceptors , and other types of receptors in the lungs in ...
1 Function. 2 Name. 3 Connections. 4 Physiology. ... In the medulla, this group is located caudally to the facial nucleus and ventral to nucleus ambiguus. [1] [2 ...
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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: The hypoglossal nucleus, which contains general somatic efferent fibers. The nucleus ambiguus, which form the special visceral efferent.