Flashcards in Unit VII - Sympathetics Deck (94)
Where does the least splanchnic nerve terminate?
What is the location of the lumbar sympathetic trunk?
In the retroperitoneal space on the lateral aspects of the lumbar vertebral bodies
Which lumbar ganglia have a white ramus communicans that carries preganglionic axons into the sympathetic trunk?
First 2, sometimes the 3rd
Which splanchnic nerves carry preganglionic axons to the plexus surrounding the abdominal aorta?
Two to four lumbar splanchnic nerves
What is the location of the sacral sympathetic trunks?
Anterior aspect of sacrum, medial to the anterior sacral foramina
How many sacral ganglia are there?
Four (five counting ganglion impar)
Where is the ganglion impar formed?
Anterior surface of coccyx
Generally, which fibers ascend in the sympathetic trunk?
From the T1 to T5 levels
Generally, which fibers descend in the sympathetic trunk?
From the T5 to L2 levels
Axons that carry information to the head and neck are carried in which nerves?
T1 and T2
Where do axons that carry information to the head and neck synapse?
Superior cervical ganglion
Axons that influence the heart arise from which levels?
Where do axons that influence the heart synapse?
One of three cervical ganglion (some pass directly to the heart)
Axons carrying information that influences the lungs leave the cord in which nerves?
Where do axons carrying information that influences the lungs synapse?
2nd, 3rd, and 4th thoracic ganglia
Preganglionic fibers carrying information for the upper extremities are carried in which nerves?
Where do preganglionic fibers heading for the upper extremities synapse?
Middle cervical and inferior cervical/stellate ganglia
Fibers that influence the abdominal viscera arise from which levels?
Where do fibers that influence the abdominal viscera synapse?
Lower thoracic ganglia or pass through trunk to be carried by greater, lesser, and least splanchnic nerves
Fibers that influence the pelvic viscera arise from what levels?
Where do fibers that influence the pelvic viscera synapse?
Ganglia in the lower thoracic, lumbar, and pelvic areas
Preganglionic fibers carrying information for the lower extremities are carried in which nerves?
Where do preganglionic fibers carrying information for the lower extremities synapse?
Second lumbar through fourth sacral ganglia
In what three ways are fibers carried from the sympathetic trunk?
Nerves, blood vessels, direct branches
Virtually all nerves carried from the sympathetic trunk carry what type of fibers?
What are the three types of postganglionic sympathetic fibers seen leaving the sympathetic trunk?
Vasoconstrictor/vasomotor, sudomotor, pilomotor (motor to the arrector pili)
What effect do direct branches from the sympathetic trunk have on blood vessels?
What effect do direct branches from the sympathetic trunk have on the bronchial tree?
What effect do direct branches from the sympathetic trunk have on glandular secretion?