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The lesser splanchnic nerve travels inferiorly, lateral to the greater splanchnic nerve. Its fibers synapse with their postganglionic counterparts in the superior mesenteric ganglion, or in the aorticorenal ganglion. [4] The lesser splanchnic nerve modulates the activity of the enteric nervous system of the midgut. Least splanchnic nerve [1] [2 ...
The splanchnic nerves are paired visceral nerves (nerves that contribute to the innervation of the internal organs), carrying fibers of the autonomic nervous system (visceral efferent fibers) as well as sensory fibers from the organs (visceral afferent fibers).
The thoracic ganglia are paravertebral ganglia.The thoracic portion of the sympathetic trunk typically has 12 thoracic ganglia.Emerging from the ganglia are thoracic splanchnic nerves (the cardiopulmonary, the greater, lesser, and least splanchnic nerves) that help provide sympathetic innervation to thoracic and abdominal structures.
Below this the lesser splanchnic nerve arises from T10–T11, leaves the sympathetic chain and synapses at the aorticorenal ganglion before going on to also supply the kidney and upper ureter. Below this the least splanchnic nerve arises from T12 and leaves the sympathetic chain to synapse at the renal plexus.
The lesser splanchnic nerve travels from the vertebral levels T10-T11 to the abdomen's superior mesenteric ganglia, which innervates the superior mesenteric artery, and to the aorticorenal ganglion. [5] The least, or lowest, splanchnic nerve connects the T12 level to the renal plexus. [11]
Autonomic nervous system's jurisdiction to organs in the human body edit; Organ Nerves [1] Spinal column origin [1]; stomach: PS: anterior and posterior vagal trunks; S: greater splanchnic nerves
Autonomic nervous system, showing splanchnic nerves in middle, and the vagus nerve as "X" in blue. The heart and organs below in list to right are regarded as viscera. The autonomic nervous system has been classically divided into the sympathetic nervous system and parasympathetic nervous system only (i.e., exclusively motor).
The superior mesenteric ganglion is the synapsing point for one of the pre- and post-synaptic nerves of the sympathetic division of the autonomic nervous system. Specifically, contributions to the superior mesenteric ganglion arise from the lesser splanchnic nerve, which typically arises from the spinal nerve roots of T10 and T11. [1]