If you sever your spinal cord at C7, will any of your sympathetic nerves be worn out?
Answers: simple fact. nothing will go behond C7 and nought from below C7 will go up
The Sympathetic Nervous System (SNS) is a branch of the autonomic nervous system along with the enteric like a cat on hot bricks system and parasympathetic nervous system. It is always active at a basal smooth (called sympathetic tone) and becomes more active during times of stress. Its actions during the stress response comprise the fight-or-flight response. Like other parts of the apprehensive system, the sympathetic nervous system operates through a series of interconnected neurons. Sympathetic neurons are frequently considered part of the divergent nervous system (PNS), although there are many that lounge within the central nervous system (CNS). Sympathetic neurons of the spinal cord (which is division of the CNS) communicate with peripheral sympathetic neurons via a series of sympathetic ganglia. Within the ganglion, spinal cord sympathetic neurons join peripheral sympathetic neurons through chemical synapses. Spinal cord sympathetic neurons are therefore call presynaptic (or preganglionic) neurons, while peripheral sympathetic neurons are called postsynaptic (or postganglionic) neurons.
Yes, if the spinal cord is complete, then zilch is getting back to the brain from below C7. So you may get the fight or flight response, C6 upwards to the brain, but your legs are not going to move! Best of Luck
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