Autonomic nervous system review Flashcards
main nerve in the parasympathetic NS
Vagus nerve (X)
Vagus nerve transmits 80% of the outflow in what NS
parasympathetic
the two divisions of the ANS
Sympathetic and parasympathetic
fight or flight response
sympathetic
rest and digest
parasympathetic
sympathetic division of nervous system influences the various organ systems of the body through connections emerging from the thoracic and upper lumbar spinal cord
Thoracolumbar system
_____ neurons in the lateral horn of any of these spinal regions projects to ganglia adjacent to the vertebral column through the ventral spinal roots.
Central neuron
The majority of ganglia of the sympathetic system belong to a network of _________ ______ ________ that runs alongside the vertebral column.
sympathetic chain ganglia
how many ganglia are in a chain on each side of the spinal cord
23
they are myelinated and therefore referred to as white
White rami communicantes
_____ _____ _______________ are unmyelinated axons
Gray rami communicantes
Junctions; The first type is most direct: the sympathetic nerve projects to the chain ganglion at the same level as the
Target Effector
The axon from the central neuron (the preganglionic fiber shown as a solid line) synapses with the _________ neuron
ganglionic neuron
The spinal nerve tracks up through the chain until it reaches the _________ _________ _________
Superior Cervical Ganglion
Ganglia, which are part of the sympathetic chain ganglia, are also called the ___________ _________
Paravertebral ganglia
Additional branches from the ventral nerve root continue through the chain and on to one of the collateral ganglia as the ________ __________ or ________ _____________
splanchnic nerve or lesser splanchnic nerve
_______ _______, also called prevertebral ganglia, are situated anterior to the vertebral column and receive inputs from splanchnic nerves as well as central sympathetic neurons.
collateral ganglia
The three collateral ganglia are
Celiac , superior mesenteric and inferior mesenteric
