Flashcards in Quiz 6: Sympathetics Deck (136)
Where are sympathetic preganglionic cell bodies located?
Lateral horn of cord levels T1-L2 or L3
Where do the preganglionic sympathetic neurons exit the cord?
After exiting the anterior rootlets, what do the preganglionic sympathetic neurons follow?
Anterior primary ramus
After exiting the anterior primary ramus, where do preganglionic sympathetics travel?
Enter the sympathetic trunk via white ramus communicans
Most preganglionic sympathetics synapse on what?
Postganglionic cells in ganglia of the sympathetic trunk
Some preganglionic sympathetic fibers will pass through the sympathetic trunk to be carried in _________ _______.
Where do the splanchnic nerves synapse?
Prevertebral plexuses associated with abdominopelvic viscera.
Preganglionic sympathetic fibers release what neurotransmitter?
What does the sympathetic trunk consist of?
Two paravertebral columns of interconnected ganglia
T/F: The sympathetic trunk carries ascending and descending fibers?
The sympathetic trunk extends from what to what?
Superior cervical ganglion inferior to ganglion impar
How many ganglia typically exist in each trunk?
21 or 22
How many cervical ganglia exist in each trunk?
How many thoracic ganglia exist in each trunk?
How many lumbar ganglia exist in each trunk?
How many sacral ganglia exist in each trunk?
What exists when the inferior cervical and superior thoracic ganglion combine?
Stellate ganglion, and therefore 21 ganglia in sympathetic trunk instead of 22.
In the cervical area, where is the sympathetic trunk located?
Posterior to carotid sheath
In the upper thoracic area, where is the sympathetic trunk located?
Anterior to the necks of the ribs
T/F: The sympathetic trunks become more laterally located inferiorly.
False, the sympathetic trunks become more medially located inferiorly.
Where is the sympathetic trunk located in the lower thoracic and lumbar regions?
Resting on the lateral aspect of the vertebral bodies
In the sacral area, where is the sympathetic trunk located?
Anterior aspect of the sacrum
Where do the sympathetic trunks join?
At the level of the coccyx
What three structures does the sympathetic trunk lie between in the cervical area?
Carotid sheath, longus colli and longus capitis muscles
How many white rami communicans exist in the cervical sympathetic trunk and ganglia?
How many gray rami communicans exist in the cervical sympathetic trunk and ganglia?
All (One for every cervical nerve)
What are the 3 cervical ganglia?
Superior, Middle and Inferior Cervical Ganglia
What is the largest cervical sympathetic ganglion?
The superior cervical ganglion is formed by the union of how many upper cervical ganglia?