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The solitary tract (tractus solitarius or fasciculus solitarius) is a compact fiber bundle that extends longitudinally through the posterolateral region of the medulla oblongata. The solitary tract is surrounded by the solitary nucleus, and descends to the upper cervical segments of the spinal cord. It was first named by Theodor Meynert in 1872.
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 ...
Opposed to Scriptural authority Matthew 19:3–9, much of Milton's argument hangs on his view of human nature and the purpose of marriage, which rather than the traditional ends of procreation or a remedy against fornication, he defines as "the apt and cheerful conversation of man with woman, to comfort and refresh him against the evils of ...
The subparabrachialnucleus and lateral crescent send efferents to the nucleus of the solitary tract, ventrolateral medulla, and spinal cord, where they target many respiratory and autonomic cell groups. [3] Many of these same brainstem and forebrain areas send efferents back to the parabrachial nucleus as well. [7] [5]
To produce the sense of taste, these neurons project to the gustatory nucleus, or the rostral and lateral regions of the nucleus of the solitary tract, and are ultimately projected to the cerebral cortex. [3] The tongue contains taste receptors, that sends sensory information via action potential to the solitary nucleus.
The muscles supplied by the vagus (included with this is the cranial root of the accessory nerve), such as levator veli palatini, are also necessary to swallow properly through integration by the nucleus of the solitary tract. The vagus also supplies the upper part of the esophagus, and other parts of the pharynx and larynx.
The 5-HT 3 receptors are present in several critical sites involved in emesis, including vagal afferents, the solitary tract nucleus (STN), and the area postrema itself. Serotonin is released by the enterochromaffin cells of the small intestine in response to chemotherapeutic agents and may stimulate vagal afferents (via 5-HT 3 receptors) to ...
Vasopressin (antidiuretic hormone, ADH) is released in response to solute concentration in the blood, decreased blood volume, or blood pressure. [citation needed]Some other inputs come from the brainstem, including from some of the noradrenergic neurons of the nucleus of the solitary tract and the ventrolateral medulla.