The Nervous System Flashcards
This is the MOTOR component of the AUTONOMIC NS under the influence of the hypothalamus.
Efferent
This is the SENSORY component that enters the dorsal root of the spinal nerves of the SOMATIC NS
Afferent
The SYMPATHETIC NS place of exit from the CNS
THORAX and LUMBAR regions of the spine (thoracolumbar NS)
The function of the SYMPATHETIC NS
Mobilization of bodily resources “FIGHT OR FLIGHT”.
In the VISCERAL NS The POSTganglionic FIBER secretes ____________.
Norepinephrine (NE)
TRUE or FALSE: in the VISCERAL NS the POSTganglionic fiber is relatively short.
FALSE, the POSTganglionic fiber is relatively LONG in the VISCERAL NS
In the VISCERAL NS the PREganglionic fiber secretes _________.
Acetylcholine (ACH)
TRUE or FALSE: in the VISCERAL NS the PREganglionic fiber is relatively short.
TRUE, the PREganglionic fiber is relatively SHORT in the VISCERAL NS
This is composed of 22 sympathetic ganglia
Sympathetic Chain
Axons of MYELINATED PREganglionic FIBER from where they leave the ventral root to where they enter the sympathetic chain.
White Ramus
Axons of NON-MYELINATED POSTganglionic Fiber from sympathetic chain to ventral root.
Gray Ramus
Places of exit from CNS are the brain and the sacral region of the spine (CRANIOSACRAL) and its functions are to conserve and store bodily resources (active after eating).
Parasympathetic NS
In the parasympathetic NS, the preganglionic fiber;
- Enter/Exit from: _________________
- Size: _________________
- Secretes _________________
- From Brain/spine to Collateral ganglion
- Long
- Acetylcholine (ACH)
In the parasympathetic NS, the postganglionic;
- Enter/Exit from: _________________
- Size: _________________
- Secretes _________________
- From Collateral ganglion to organ
- Short
- Acetylcholine (ACH)
This is where fibers cross from one side of the spinal cord to the other.
Gray Commissure
These are found in the lateral area of white matter and consist of short tracts that connect to different levels of the spinal cord.
Ground Bundles
This tract originates in the spinal cord and terminates in the thalamus.
Spinothalamic Tract