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14 Cards in this Set
- Front
- Back
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Autonomic Sensory
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senses we are not conscious of inside the body (ie visceral
sensory) |
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Autonomic Motor
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actions which we are not consciously controlling
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symathetic
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flight or fight
–Response to unusual stimulus –Takes over to increase activities E division (exercise, excitement, emergency, embarrassment) |
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parasympathetic
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•Conserves energy
•Maintains daily necessary body functions D division (digestion, defecation, diuresis) |
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preganglionic nerves
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•Bunching of neuron cell bodies. It is NOTwhere
synapses occur!!! •Preganglionic nerve receives input from CNS and leaves out into the Peripheral nerves –Dendrite end of preganglion is in CNS –Cell body = the gray matter of CNS (eg. lateral horn of spinal cord) –Axon end exits spinal cord out the ventral root, along with somatic motor efferents travels to and synapses to the dendrite end of postganglionic nerve cranial nerves and sacral nerves longer than Postganglionic nerves |
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Postganglionic nerves
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OUTSIDE of the CNS
–Aka –the autonomic ganglion •Axon of Postganglionic nerve goes to its effector for the desired effect •Both sympathetic & parasympathetic postganglionic axons go to the same destination shorter than preganglionic nerves |
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sympathetic impulse
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increase HR
increase BP increase blood to legs to run decrease digestion... parasympathetic impulses |
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3 sympathetic post ganglion path
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All preganglionic fibres leave the spinal cord via the
ventral horn →spinal nerve → ventral ramus → sympathetic ganglia (chain) then: 1) along the same spinal nerve on the same vertebral level (most common) 2) along a different vertebral level 3) along a sympathetic ganglia which is NOT part of the sympathetic chain |
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lateral horn in CNS
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only in thoracic
between ventral and dorsal horns |
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1) along the same spinal nerve on the same vertebral level
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–synapse occurs in the sympathetic ganglion at the same level at which it entered the chain
-most common "rest stop" to decide directions (same level, or up or down) |
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2) along a different vertebral level
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–synapse in the sympathetic chain occurs at a different level
Near or within sympathetic chain, preganglionic n. synapses with a postganglionic n. which then: –Ascends to an upper thoracic or –Descends to a lower lumbar spinal nerve |
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3) along a sympathetic ganglia which is NOT part of the sympathetic chain
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–synapse in a collateral ganglion which lies anterior to the vertebral column
-travel directly to adrenal glands -separate route does NOT synapse anywhere near the sympathetic chain it exits the sympathetic chain and merges with other preganglions to form its own dedicated splanchnic nerve (akin to plexus) |
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sympathetic ganglia
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ramus communicans leading to it
"rest stop" decides where to go next |
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Adrenal medulla
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releases the hormones NE/E in response to sympathetic innervation via the sympathetic splanchnic nerve
releases adrenaline into blood |
