Flashcards in Unit VII - More Sympathetics Deck (77)
How does the least splanchnic nerve reach the kidneys?
Via renal plexus
What do the gray rami communicans of the lumbar nerves supply?
Arrector pili, sweat glands, and blood vessels in the field of distribution of each lumbar nerve
What are the branches of the lumbar sympathetic trunk that accompany blood vessels?
Vascular branches that follow lumbar arteries back to abdominal aorta then follow abdominal aorta as far as the median sacral artery and common iliac arteries
What branches of the lumbar sympathetic trunks travel directly to visceral structures?
Lumbar splanchnic nerves supply pelvic viscera via superior and inferior hypogastric and inferior mesenteric plexuses
What branches of the pelvic sympathetic trunk accompany nerves?
Gray ramus communicans seen at all sacrococcygeal levels that supply arrector pili, sweat glands, and blood vessels in the nerves' fields of distribution
What branches from the pelvic sympathetic trunk accompany blood vessels?
Vascular branches that follow median sacral artery
What branches from the pelvic sympathetic trunks travel directly to visceral structures?
Sacral (NOT pelvic) splanchnic nerves supply pelvic viscera via inferior mesenteric plexus (to ureters and rectum)
The autonomic plexuses are primarily concerned with supply of what kind of structures in the thoracic and abdominopelvic cavities?
What types of fibers can be seen in the autonomic plexuses?
Preganglionic and postganglionic parasympathetics AND sympathetics along with somatic and visceral afferents
What is the main contribution to the esphageal plexus?
Vagus and recurrent laryngeal nerves
Where do the vagus and recurrent laryngeal nerves synapse in the esophageal plexus?
On postganglionic cells in the wall of the esophagus
What is the sympathetic contribution of the esophageal plexus?
Greater splanchnic nerves (from T5-T9 or T10 ganglia)
Fibers found in the thoracic aortic plexus came from which locations?
Vagus nerve, greater splanchnic nerve, T1-T5 sympathetic ganglia
What kinds of fibers are carried in the vagus nerve's contribution to the thoracic aortic plexus?
Sensory and visceral afferent
What kinds of fibers are carried in the greater splanchnic nerve's contribution to the thoracic aortic plexus?
What kinds of fibers are carried in the T1-T5 sympathetic ganglia contribution to the thoracic aortic plexus?
What type of fibers are the primary component of the pulmonary plexus: sympathetic or parasympathetic?
How do parasympathetics reach the pulmonary plexus?
Via anterior and posterior bronchial branches of the vagus nerve
Where do preganglionic fibers synapse with postganglionic fibers in the pulmonary plexus?
In the wall of bronchial vessels
What effect does parasympathetic stimulation have on the bronchi and small vessels?
Constriction (also increased secretion of local glands)
Sympathetic fibers in the pulmonary plexus arise from which ganglia?
What do the sympathetic fibers of the pulmonary plexus supply?
Pleura, bronchial glands, musculature
What is supplied by the cardiac plexus?
Myocardium, great vessels at the base of the heart, coronary arteries
Parasympathetic information arrives at the cardiac plexus via what nerves?
Superior and inferior cardiac nerves (branches of the vagus)
What is the parasympathetic influence on the heart?
Decreased heart rate and constriction of the coronary arteries
Sympathetic fibers arrive to the cardiac plexus via what nerves?
Superior, middle, and inferior cardiac nerves and from the T2-T4 sympathetic ganglia
What is the sympathetic influence on the heart?
Increased heart rate and dilation of coronary vessels
What is the largest prevertebral plexus?
Where does the celiac plexus begin?
L1 vertebra level