The Sympathetic Chain is a series of interconnected sympatheticganglia, belonging to the autonomic nervous system. It lies adjacent to the vertebral column, receiving input from preganglionic sympathetic fibres, and projecting postganglionic sympathetic fibres to tissues and organs. Grays FIG. 838– The right sympathetic chain and its connections with the thoracic, abdominal, and pelvic plexuses. ... GÅNGLÎÅ is a 1 man electronic grindcore band from Los Angeles California that began in August of 1999. ... This article is in need of attention from an expert on the subject. ... The vertebral column seen from the side Different regions (curvatures) of the vertebral column The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ... A biological tissue is a group of biological cells that perform a similar function. ... An organ is the following: In anatomy, an organ is a group of tissues which perform some function. ...
Source
"Neuroscience: Exploring the Brain"; Bear, Connors, Paradiso; 2001;
The Sympathetic Afferent Fibers of the Glossopharyngeal Nerve are supposed to arise either in the dorsal nucleus (nucleus ala cinerea) or in a distinct nucleus, the inferior salivatory nucleus, situated near the dorsal nucleus.
Sympathetic Afferent Fibers, whose cells of origin lie in the superior or inferior ganglion of the trunk, are supposed to terminate in the dorsal nucleus.
The Sympathetic Efferent Fibers of the Vagus Nerve are supposed to arise in the dorsal nucleus (nucleus ala cinerea).
Sympathetic and parasympathetic stimulation can be either inhibitory or excitatory, and in general the effect is determined by the characteristic response of that effector tissue.
Sympathetic nerve stimulation leads to vasoconstriction and contraction of smooth muscles of the prostate, seminal vesicles, prostatic urethra and vas deferens, emission of semen into the urethra (ejaculation is affected by sacral outflow from S2-S4), and subsidence of erection by increasing muscle tone in the smooth muscle of the arteries of the erectile tissue.
Outflow includes parasympathetic supply to the genital erectile tissue; sympathetic supply for the emission of prostatic and vesicular fluid and smooth muscle contraction of the vas deferens, seminal vesicles, and ejaculatory ducts; and somatic motor supply to the striated muscles of the pelvic floor (these contractions in the male are part of the ejaculation response).
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