Pelvic Viscera Pt. 2 Flashcards Preview

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Flashcards in Pelvic Viscera Pt. 2 Deck (39)
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1
Q

In general, in the Pelvis, sympathetic motor innervation causes what two things?

A
  1. ) Contraction of smooth muscle sphincters

2. ) Vasoconstriction of blood vessels

2
Q

In general, in the Pelvis, parasympathetic motor innervation causes

A
  1. ) Relaxation of smooth muscle sphincters

2. ) Stimulates smooth muscle contractions of the bladder and rectum

3
Q

In the pelvis, PREGANGLIONIC SYMPATHETIC neurons have their cell bodies located in the

A

Lateral horn of spinal cord segments L1 and L2

4
Q

Axons enter the sympathetic chain via white rami communicans with most of them passing through the L1, L2 ganglia exiting as

A

Lumbar Splanchnic nerves

5
Q

The PREGANGLIONIC SYMPATHETIC fibers in the lumbar splanchnic nerves may enter the

A

Superior or inferior mesenteric ganglia and synapse

6
Q

Additionally, some PREGANGLIONIC SYMPATHETIC fibers will continue along the aorta and enter the

A

Superior hypergastric plexus

7
Q

The superior hypogastric plexus is located at the

A

Aortic bifurcation

8
Q

These PREGANGLIONIC SYMPATHETIC fibers will then enter the pelvis using the

A

Right or left hypogastric nerves

9
Q

The right and left hypogastric nerves end in the

A

Inferior hypogastric plexus

10
Q

The inferior hypogastric plexus is located along the walls of the

A

Pelvic Viscera

11
Q

To recap, the PREGANGLIONIC SYMPATHETIC may synapse on POSTGANGLIONIC sympathetic cell bodies located in either the

A

Superior mesenteric, inferior mesenteric, or inferior hypogastric plexuses

12
Q

POSTGANGLIONIC SYMPATHETIC axons travel with blood vessels or leave the inferior hypogastric plexus directly to the

A

Smooth muscle of the viscera they innervate

13
Q

The cell bodies of PREGANGLIONIC PARASYMPATHETIC neurons are located in spinal cord segments

A

S2, S3, and S4

14
Q

PREGANGLIONIC PARASYMPATHETIC axons branch from ventral rami of S2, S3, and S4 and merge to form the

A

Pelvic splanchnic nerves

15
Q

Most of these PREGANGLIONIC PARASYMPATHETIC fibers enter the inferior hypogastric plexus where they synapse on postganglionic cell bodies. While others travel to ganglia located on the walls of the

A

Viscera

16
Q

Where are the POSTGANGLIONIC PARASYMPATHETIC cell bodies located?

A

Inferior hypogastric plexus of the walls of the viscera they innervate

17
Q

Convey reflex information such as the degree of bladder filling or pain

A

Visceral afferent nerves

18
Q

In general, reflex afferents travel with

A

PARASYMPATHETIC nerves

19
Q

In general, pain afferents travel with

A

SYMPATHETIC nerves

20
Q

However, in the pelvis, both SYMPATHETIC and PARASYMPATHETIC fibers carry

A

Pain fibers

21
Q

Delineates which system (sympathetic or parasympathetic) the pain fibers will travel

A

Pelvic Pain line

22
Q

Viscera above the pelvic pain line

A

Intraperitoneal Viscera

23
Q

Above the pelvic pain line, visceral pain from the intraperitoneal pelvic viscera accompanies

A

Sympathetic fibers via hypogastric plexuses to T11-L1

24
Q

What are the structures of the intraperitoneal viscera?

A

Fundus and body of uterus, uterine tubes, and ovaries

25
Q

Thus, uterine contractions are referred to regions supplied by these levels and manifest as

A

Lower back pain

26
Q

Viscera below the pelvic pain line

A

Subperitoneal Viscera

27
Q

Below the pelvic pain line, visceral pain travels via

A

Pelvic splanchnic (parasympathetic) nerves to S2-S4 spinal cord levels

28
Q

What are the structures of the subperitoneal viscera?

A

Cervix, upper vagina, and bladder

29
Q

What are the 5 autonomic structures of the pelvic viscera?

A
  1. ) Lumbar splanchnic nerves
  2. ) Intermesenteric plexus
  3. ) Superior hypogastric Plexus
  4. ) Right and left hypogastric nerves
  5. ) Inferior hypogastric plexus
30
Q

Contain PREGANGLIONIC SYMPATHETIC fibers from spinal cord levels T11-L2 that enter the preaortic ganglia

-Also carry visceral afferents

A

Lumbar splanchnic nerves

31
Q

Contains PRE- and POSTGANGLIONIC SYMPATHETIC nerve fibers running between preaortic ganglia

A

Intermesenteric plexus

32
Q

At the bifurcation of the aorta, the intermesenteric plexus ends as the

A

Superior hypogastric plexus

33
Q

Contains PRE- and POSTGANGLIONIC SYMPATHETIC fibers from the intermesenteric plexus

A

Superior Hypogastric Plexus

34
Q

NO synapses occur within the

A

Superior Hypogastric plexus

35
Q

Carry PRE- and POSTGANGLIONIC SYMPATHETIC fibers from the superior hypogastric plexus down into the pelvis to the right and left inferior hypogastric plexuses

-Also carry visceral afferents

A

Right and Left Hypogastric nerves

36
Q

Contain cell bodies of POSTGANGLIONIC SYMPATHETIC neurons

A

Inferior hypogastric plexuses

37
Q

PREGANGLIONIC SYMPATHETIC fibers synapse on POSTGANGLIONIC cell bodies here

A

Inferior Hypogastric plexuses

38
Q

POSTGANGLIONIC SYMPATHETIC fibers then travel from the inferior hypogastric plexuses with branches of the

A

Internal iliac artery

39
Q

Contains PRE- AND POSTGANGLIONIC SYMPATHETIC and PRE- AND POSTGANGLIONIC PARASYMPATHETIC nerves as well as visceral afferents

A

Inferior hypogastric plexuses

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