Lecture 8 part one (SECOND MIDTERM) Flashcards
The way we refer to the organization of the autonomic nervous system is…
the two motor neuron system
Function of ANS:
motor control of most internal organs, smooth muscle of gut and blood vessels, skin glands, cardiac muscle
Separation of function…
Sympathetic:
Parasympathetic:
Sympathetic: “fight or flight”
Parasympathetic: rest, rumination (digestion), calm
Concerning sympathetic and parasympathetic, which one is voluntary and which one is involuntary?
they’re both involuntary
(Main) neurotransmitter of sympathetic? Parasympathetic?
Symp: norepinephrine
Para: acetylcholine
Difference between sympathetic and parasympathetic…
Blood vessels to musculo-skeletal:
Symp: dilate
Para: constrict
Difference between sympathetic and parasympathetic…
Blood vessels to internal organs:
Symp: constrict
Para: dilate
Difference between sympathetic and parasympathetic…
Synapses away/on or near target structure:
Symp: away from target structure
Para: on or near target structure
Autonomic fiber placement…
Sympathetic:
Parasympathetic:
Symp: emerge from “Thoracolumbar” region (T1-L2)
Para: emerge from “Cranio-sacral” region (Cnn III, VII, IX, X; S2-4)
*parasympathetic is PARAllel to sympathetic!
PARASYMPATHETIC
Preganglionic fibers are ________ while postpanglionic fibers are ________.
long, short
Why aren’t parasympathetic ganglia easily dissectible?
they are usually embedded inside of the wall of the target structure; intramural ganglia
Ganglia that are not easily dissectible:
Ciliary Pterygopalatine Otic Submandibular Intramural
SYMPATHETIC
Preganglionic fibers are _______ while postganglionic fibers are ________.
short, long
For sympathetic innervation, it synapses away from the target structure at ____________ or ___________ ganglia.
paravertebral, preaortic (collateral)
Names of the specific paravertebral ganglia:
Superior cervical
Middle cervical
Inferior cervical
Cervicothoracic
