Autonomic Nervous System Flashcards
The autonomic nervous system (ANS) is primarily an _____ system controlling smooth muscle, cardiac muscle and glands, and is best described as the “Visceral Motor System.”
EFFECTOR
Autonomic nervous system contains 3 division:
- Sympathetic Division -Parasympathetic Division
- Enteric Division
Autonomic nervous system OUTPUT requires a _____ chain.
2 neuron
Preganglionic neuron are finely _____; synapses with many _____ neurons (divergence); inhibitory interneurons present in _____; cell bodies are located in _____.
- Myelinated
- postganglionic
- ganglion
- CNS
Postganglionic
neuron are _____; goes to
the _____; cell bodies are located in _____
May be excitatory or inhibitory
- unmyelinated
- effector
- ANS ganglia
SYMPATHETIC DIVISION is known as the _____ OR _____ division.
- “Flight or fight” division
- Thoracolumbar division
Preganaglionic neurons for the Sympathetic division is located where?
Spinal cord segments
T1 - L2/3
Preganaglionics of the Sympathetic division’s cell bodies are located in?
Nuclei in intermediate
gray (Intermediolateral cell column)
85% of serotonin is made in the _____ division.
Enteric
Preganglionic neurons are classified as __ -Fibers
B-fibers
The ganglia of the Postganglionic of the Sympathetic division is called?
Paravertebral/ prevertebral (Sympathetic chain/trunk)
Sympathetic division is responsible for what function in general?
Regulating Homeostasis
Postganglionic Sympathetics will extend to which two cavities?
Abdominal and pelvic cavities
_____ Sympathetics are usually named by major blood vessels.
Postganglionic
Which chain has:
- Paired chain of ganglia
- Extend length of spine
Sympathetic chain
What are the REGIONS of the sympathetic chain? (4)
- Cervical
- Thoracic
- Lumbar
- Sacral
Sympathetic chain will terminate as _____.
Ganglion impar (At the very end of the cord by the cocyx, pair coming together)
Preganglionic neurons enter chain and may: -Synapse \_\_\_\_\_ -\_\_\_\_\_, then synapse -\_\_\_\_\_, then synapse -Pass through chain and synapse in \_\_\_\_\_ ganglia
- At that level
- Ascend
- Descend
- Prevertebral ganglia
Preganglionic Sympathetics are ONLY found in what cord segments?
T1-L3
_____ neuron cell bodies are in the chain.
Postganglionic sympathetics
_____ are synapsing on the sympathetic chain.
Preganglionics
Preganglionic sympathetics starts in the _____ cell column. (Before this is just nerve root)
Anterolateral cell column
Postganglionic sympathetic neurons will exit the chain in _____ ramus.
Gray
_____ sympathetic neurons will exit the chain as specific nerve
Postganglionic
Postganglionic sympathetic neurons leaves in a _____ ganglion.
Prevertebral
_____ ramus cummunicans are present in all cord segment. While _____ ramus cummunicans are only present in _____.
- White ramus
- Gray ramus
- T1-L3
White ramus communicans creates the _____ and is for getting in the chain.
White ramus
_____ ramus is created by postanglionics which goes posterior to innervate glands, and smooth muscles.
Gray
Every strip of our body has _____ which is created by the gray ramus.
postganglionics
Sympathetic chain sends innervation to the effectors in the _____, _____ and _____ effectors
Head, thoracic cavity and peripheral effectors
Innervations to effectors in the thoracic cavity (heart) starts where? Level?
Intermediolateral cell column T1-T4/T5 comes out, and forms the Cardiac nerve.
Preganglionics comes out from the _____ root to get into the spinal nerve then swing out into the _____ ramus and get into the chain
Ventral; white
Innervations to effectors in the head will require preganglionics to ride up the chain. T/F?
True
Damage to sympathetic chain will cause what syndrome?
Horner’s syndrome
What are the 3 symptoms of Horner’s syndrome?
- Miosis (Constriction of pupil)
- Ptosis (Drooping of eyelid)
- Anhydrosis (No sweat)
