Sympathetic System Flashcards
How many ganglia (synapses) are present in the somatic system pathway?
1
How many ganglia (synapses) are there in the sympathetic system pathway?
2
Which spinal cord segments give rise to sympathetic nerve fibers?
T1-L2
Which spinal cord segments give rise to somatic nerve fibers?
C1-S5
In the spinal cord which horn contains somatic nerve cell bodies?
Dorsal and ventral
In the spinal cord which horn gives rise to sympathetic nerve cell bodies?
The lateral horn
Between which vertebral levels does the sympathetic chain extend?
C1 - Cc1
What is the function of the white rami communicans?
Carry sympathetic fibers from the spinal nerve to the sympathetic ganglion
What is the function of the grey rami communicans?
Carry sympathetic fibers from the sympathetic ganglion back to the ventral remains
How many thoracic splanchic nerves are there?
3
What are thoracic splanchic nerves?
Sympathetic nerves which supply the abdominal organs
Where do the thoracic splanchic nerves originate?
T6-T12
Do the splanchic nerves synapse in the sympathetic chain as they travel down the chain from the thorax to the abdomen?
No
Where do the thoracic splanchic nerves synapse?
They synapse on ganglia situated on the front of the aorta (pre-aortic) ganglia
Are the pelvic splanchnic nerves sympathetic or parasympathetic?
Parasympathetic
