Differences between Sympathetic and Parasympathetic Nervous System Flashcards
Where does the ANS arise from
Neural crest cells
What 3 tissues is the ANS modulated by
Hypothalamus, cerebral cortex, limbic system
What are the three functional divisions of the autonomic nervous system
Sympathetic NS, Parasympathetic NS, Enteric NS
What is the anatomical division of the Sympathetic NS
Thoraco-lumbar Division
What is the anatomical division of the Paraympathetic NS
Cranial-Sacral Division
What is the anatomical division of the Enteric NS
Meissner’s and
Auerbach’s
plexuses
What is the pharmological division is the parasympathetic NS in the ANS
Cholinergic System
What is the pharmological division is the sympathetic NS in the ANS
Adrenergic/
Nor-adrenergic
system
What are the 4 cranial extensions
NIII
NVII
NIX
NX
What are the 3 sacral extensions
S2, S3, S4
What nerve occupies the NIII
Ciliary Ganglion (eye)
What nerves occupy the NVII
Sphenopalatine (Nasal Cavity)
Submandibular (salivary excretory ducts)
What nerves occupies the NIX
Otic
What nerves occupies the NX, S2, S3, S4
Pelvic Nerve
What are the two ganglia of the Paravertebral Ganglionic Chain
Cervical, Prevertebral ganglia
What are the nerve roots that occupy the Thoraco-Lumbar Division
T1-L3
Where does the Sympathetic Fibres synapse
Paravertebral Ganglionic Chain
True or False, the Sympathetic Fibres pass only down the paravertebral ganglionic chain
False, they pass up and down the chain
Where do the sympathetic fibres re-enter through after synapsing
grey rami communicates
What does the Prevertebral or Collateral Ganglia include
Coeliac Ganglion, Superior Mesenteric Ganglion, Inferior Mesenteric Ganglion
Postganglionic sympathetic fibres which re-enter the spinal nerves via the grey rami communicantes are distributed to:
Blood vessels supplying skeletal muscles
Eccrine sweat glands
Piloerector muscles
T1 passes up the inferior, middle & superior cervical ganglion to supply :
Head, distributed with blood vessels
What does T2 supply
neck and thorax
What does T2-T4
thorax
Greater splanchnic nerve arises from
T5 – T9
Small splanchnic nerve arises from
T10-T12
Least splanchnic nerve arises from
L1-L3
What areas of the body does the Least splanchnic nerve supply
Lower abdomen and genitals
What enzyme converts NE to E
phenylethanolamine-N-methyl transferase (PNMT
Adrenal Medulla release what percentage of E
80-90%
Adrenal Medulla release what percentage of NE
10-20%
Adrenal Medulla release small amounts of what neurotransmitter
Dopamine
Where are the sympathetic fibres distributed
Synapse at the corresponding level of the paravertebral ganglionic chain
Pass up or down the chain
Pass through the chain to synapse in prevertebral ganglia
Re-enter (grey rami communicantes) the spinal nerve after synapsing
What nerve supplies the Coeliac Ganglia
Greater Splanchnic nerve
What nerve supplies the Superior Mesenteric Ganglia
Small Splanchnic Nerve
What nerve supplies the Inferior Mesenteric Ganglia
Least Splanchnic Nerve
