The autonomic nervous system and pelvic viscera Flashcards
(34 cards)
What is the autonomic nervous system distributed throughout
CNS and PNS
What is the autonomic nervous system divided into
Sympathetic and parasympathetic
What region is the parasympathetic nervous system associated with
Craniosacral region
What regions the sympathetic nervous system associated with
Thoracolumbar
What are the PNS neutrons divided into
Somatic sensory neurone
Somatic motor neurone
Autonomic motor neurone
What is the efferent pathway of autonomic nervous system
Autonomic motor neurone
Where are the preganglionic neurones situated in the autonomic motor neurone
Lateral Grey horn of spinal cord
Which cranial nerves contribute to the autonomic motor neurone
3,7,9,10
What is the role of the sympathetic division
Function to prepare body for an emergency:
- INcrease HR
- Redistribution of blood
- Increase BP
Where does the efferent outflow of the sympathetic division come from
Spinal cord, sympathetic trunk, branches, plexuses and ganglia
Where do preganglia that innervate head, thoracic viscera (foregut) come from
T1-T6
Where do preganglia that innervate abdominal viscera (midgut) come from
T7-T11
Where do preganglia that innervate pelvic viscera (hindgut) come from
T12-L2(3)
What is the course of preganglia
Come from lateral grey horn of spinal cord
Go to paravertebral ganglia of sympathetic trunk
Once reached, can do one of 4 things:
- Synapse at entry level
- Ascend and then synapse
- Descend and then synapse
- No synapse, form splanchnic nerves
How many ganglia are in the neck
3
How many ganglia are in the abdomen
4/5
How many ganglia are in the thorax
11/12
How many ganglia are in the pelvis
4/5
Where do the greater splanchnic nerves originate from
T5-T9
Where do the lesser splanchnic nerves originate from
T10-T11
Where do the least splanchnic nerves originate from
T12
where do the splanchnic nerves originate from
Thoracic sympathetic trunk
Where do the splanchnic nerves synapse
IN the abdominal region with the prevertebral ganglia
Where are the nerve cells of the parasympathetic nervous system located
Brainstem and sacral segments of the spinal cord
