Autonomic Nervous System Flashcards
Characteristics of PRE- ganglionic neurons?
- ALWAYS Myelinated
- Synapses w/ POST-ganglionic neurons
- Utilizes ACh
Characteristics of POST- ganglionic neurons?
- NEVER Myelinated
- Originates from the Ganglion
- Generally utilizes N-epi
ANS background
- 2 divisions
(Sympathetic and Parasympathetic) - ENTIRELY MOTOR
- Dual innervation of most systems
Where do Parasympathetic nerves synapse?
On microscopic GANGLION cells embedded in the walls of target organs
Parasympathetic system is primarily responsible for what?
Rest and Digest
- Maintaining and coordinating GUT fxn
Sympathetic system is primarily responsible for what?
Responses to
- Fear
- Anger
- Anxiety
Where do Sympathetic nerves synapse?
On cells located in LARGE ganglia located in the DORSAL wall
Where do the Thoracic Sympathetic Chain lie?
- Against the neck of RIBS
&
- Costovertebral Junctions
How many thoracic ganglion pairs?
12
The preganglionic Sympathetic supply to the Thoracic Viscera from what Spinal nerve region?
T1 - T5
Fxn of the Cardiopulmonary Splanchnic nerves
- Coronary artery DILATION
- Inc. Heart Rate
- Bronchiodialtion
Splanchnic Nerves
Bundle of Preganglionic fibers traveling to the PRE-AORTIC ganglia
- Supply the ABDOMINAL viscera
The GREATER Splanchnic nerves come off of what nerve levels on the spinal chord?
T5 - T9
The LESSER Splanchnic nerves come off of what nerve levels on the spinal chord?
T10 - T11
The LEAST Splanchnic nerves come off of what nerve levels on the spinal chord?
T12
