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
Components of the GREATER Splanchnic nerve?
- Celia ganglia
- Celia plexus
- Hepatic plexus
Celiac plexus is sympathetic to what?
- The GI system
- stomach
- DJI
- spleen
- pancreas
- gall bladder
- kidneys
- adrenal glands
Components of the LESSER Splanchnic nerve?
Sup Mesenteric ganglia
- DJI
- Appendix
- Colon
- pancreas
Components of the LEAST Splanchnic nerve?
Aoricorenal ganglia
- Kidneys
- Adrenal glands
Abdominal Sympathetic trunk
Continuous with the THORACIC symp trunk
- Lumbar Splanchnic nerves
- Inf mesenteric ganglion
Vagus nerve is also known as what?
CN X
Major role of Vagus Nerve?
Major Parasympathetic supply to the Thoracic and Abdominal Viscera
Branches of the Vagus Nerve?
- Cardiac brach - Cardiac plexus
- Pulmonary branch - pulmonary plexus
- Esophageal branch - esophageal plexus
- Left Recurrent laryngeal nerve - Left vagus
- Right Recurrent laryngeal nerve - Right vagus
T/F: Nerves follow Arteries in the Mesenteric Autonomic Plexus?
True
