Sympathetic NS vs Parasympathetic NS Flashcards
Recall what the parasympathetic nervous system’s main function is?
REST and DIGEST
Recall what the sympathetic nervous system’s main function is?
FIGHT or FLIGHT or FREEZE
Most organs are innervated by fibers from both divisions, making the influence usually ________________.
ie. PaNS slows the heart while SyNS increases rate
ANTAGONISTIC
SyNS is not only associated with fight or flight but also overall ________________.
HOMEOSTASIS
The SyNS is always active at a basal level, called ___________ _______, and becomes more active during stress resulting in fight-or-flight response.
SYMPATHETIC TONE
PaNS nerve cell bodies are located in the brain stem and the sacral region of the SC; therefore it is also known as what?
CRANIOSACRAL DIVISION
Which cranial nerves in the medulla carry parasympathetic fibers?
CRANIAL NERVES:
III + VII + IX + MOSTLY X
All SyNS outflow is via the T1 - L2 cell bodies in the ___________ _________.
LATERAL HORN
The lateral horn is one of 3 grey columns of the spinal cord, name the other two?
ANTERIOR and POSTERIOR HORNS
Where is the lateral horn present in the SC?
14 LEVELS
T1 - L2
What is the SyNS also referred to as?
THORACOLUMBAR OUTFLOW
In the SyNS, fibers are __________ preganglionic and _________ postganglionic.
SHORT PRE
(MULTIPLE) LONG POST
In the PaNS, fibers are __________ preganglionic and _________ postganglionic.
LONG PRE
SHORT POST to <3
Interneurons are connections that are not motor or sensory; they occur between afferent and efferent connections in the _______.
CNS
A nucleus or multiple nuclei are found in the _______.
CNS
