Innervation of Abdominal Viscera: Regulation of G-I Function and Pain Perception Flashcards Preview

Structure and Function Test 1 > Innervation of Abdominal Viscera: Regulation of G-I Function and Pain Perception > Flashcards

Flashcards in Innervation of Abdominal Viscera: Regulation of G-I Function and Pain Perception Deck (79):
1

For sympathetic innervation with the T5-9 (or 10) spinal cor segment, what is the
1.) Pre-ganglionic splanchnic nerve
2.) Prevertebral ganglion

1.) Greater splanchnic nerve
2.) Celiac ganglion

2

For sympthetic innervation with the T10-11 spinal cord segment what is the
1.) Pre-ganglionic splanchnic nerve
2.) Prevertebral ganglion

1.) Lesser Splanchnic nerve
2.) Superior mesenteric (or aorticorenal) ganglia

3

For sympathetic innervation with the T12 spinal cord segment, what is the
1.) Pre-ganglionic splanchnic nerve
2.) Prevertebral ganglion

1.) Least Splanchnic nerve
2.) Aorticorenal (or cell bodies in renal plexus) ganglia

4

For sympathetic innervation with the L1-2 spinal cord segment, what is the
1.) Pre-ganglionic splanchnic nerve
2.) Prevertebral ganglion

1.) Lumbar Splanchnic nerve
2.) Inferior mesenteric ganglia

5

What is the destination of the sympathetic innervation from
1.) T5-6
2.) T7-9
3.) T6-10

1.) Abdominal esophagus
2.) Liver and biliary tree
3.) Stomach, spleen, pancreas, and proximal duodenum

6

What is the destination of the sympathetic innervation from
1.) T9-T10
2.) T10
3.) T10-T11

1.) Distal duodenum, pancreas, jejunum, and ileum
2.) Appendix
3.) Proximal colon

7

What is the destination of the sympathetic innervation from
1.) T12
2.) L1-2

1.) Proximal colon
2.) Distal colon

8

Pain and pressure afferents follow

-sensitive to distension

Sympathetic pathways

9

What is the function of sympathetic G-I innervation?

Decreases motility and secretion

10

Site of synapse in intestinal wall for foregut and midgut

Myenteric and submucous plexuses

11

Site of synapse in intestinal wall for hindgut

Enteric plexuses

12

What is the function of parasympathetic G-I innervation?

Increases motility and secretion

13

What are the two preganglionic nerves of parasympathetic G-I innervation?

1.) Vagus nerve trunks
2.) S2-4 ventral rami

14

For the vagus nerve trunks, what is the autonomic plexus?

Celiac plexus and superior mesenteric plexus

15

For the S2-4 ventral rami, what is the autonomic plexus?

Inferior hypogastric plexus

16

What is the destination of innervation from the vagus nerve trunks?

Esophagus through proximal 2/3 of transverse colon

17

Synapse within alimentary tract from esophagus through proximal 2/3 of transverse colon

Intrinsic (enteric) Ganglia

18

What is the destination of innervation from the S2-4 ventral rami?

Distal 1/3 of transverse colon to rectum

19

Synapse within alimentary tract from distal 1/3 of transverse colon to rectum

Intrinsic (enteric) Ganglia

20

Reflex afferents follow

Parasympathetic pathways

21

The system of neurons and their supporting cells that is found within the walls of the alimentary tract

Enteric Nervous System

22

Neurons are within ganglia in

Intrinsic plexuses

23

The main plexuses which contain neurons in ganglia are the

Myenteric (Auerbach's) and Submucosal (Meissner's)

24

The myenteric (Auerbach's) plexus is between the

Longituginal and circular muscles

25

The submucosal (Meissner's) plexus is between the

Circular muscle and muscularis mucosae

26

Synapse with cells in the same or other ganglia

Intrinsic neurons

27

Intrinsic neurons project to effectors in the walls of the

Alimentary tract (e.g. muscle, mucosae)

28

Outside the walls of the alimentary tract, intrinsic neurons connect with

Autonomic ganglia

29

Intrinsic neurons send afferents to the

CNS

30

Intrinsic neurons innervate

Mesenteric arteries and arterioles of the colon

31

Governs the normal motility and secretory functions of the intestine

Enteric nervous system

32

The enteric nervous systems actions are affected and modified by the

Extrinsic nerve supply

33

Retains many functions after all central connections are severed

Enteric nervous system

34

Sympathetic and parasympathetic denervation have a transient effect on

Gut motility

35

Intrinsic plexuses contain complete reflex pathways consisting of

Enteric neurons, interneurons, and motor neurons

36

Monitor intestinal wall tension and intestinal contents

Enteric neurons

37

Form information links between enteric neurons

Interneurons

38

Change the activity of the intestine

Motor neurons

39

Involves transfer of impulses from intrinsic sensory neurons via the interneurons to cephalad directed excitatory motor neurons and caudally directed inhibitory motor neuron

Peristaltic reflex

40

An unpleasant sensation associated with actual or potential tissue damage, and mediated by specific nerve fibers to the brain where its conscious appreciation may be modified by various factors

Pain (symptom/subjective)

41

Sensitive or painful as a result of pressure or contact that is not sufficient to cause discomfort in normal tissues

Tenderness (sign/objective)

42

Dull and poorly localized pain resulting from noxious stimulus to abdominal viscus

Abdominal pain

43

Perceived in the midline because sensory afferents come from both sides of spinal cord

Abdominal pain

44

What type of abdominal pain is seen in the
1.) Foregut
2.) Midgut
3.) Hindgut

1.) Epigastric
2.) Unbilical
3.) Suprapubic

45

Corresponds roughly to dermatomes which are innervated by the same spinal cord level from which
diseased organ receives its innervation

Site of abdominal pain

46

Nerve impulses pass through the pre-vertebral splanchnic ganglia, reach the sympathetic chain in the splanchnic nerves, and enter the dorsal root via the

White ramus communicans

47

Perceived as originating in areas supplied by the somatic nerves entering the spinal cord at the same segment as the sensory nerves from the organ producing the pain because of shared central pathways by afferent neurons from different sites

Referred pain

48

usually fairly well localized

Referred pain

49

Referred pain usually appears when the noxious visceral stimulus becomes

More intense

50

Results from noxious stimulus to the parietal peritoneum

-Aggrevated by movement or coughing

Parietal pain

51

What is more intense, parietal pain or visceral pain?

Parietal

52

In parietal pain, nerve impulses travel within

Somatic sensory nerves

53

In parietal pain, nerve impulses travel within somatic sensory nerves and the fibers reach the spinal cord in the peripheral nerves corresponding to the

Cutaneous dermatomes from T6 to L1-3

54

What is the following innervation for the biliary tree and gullbladder?
1.) Parasympathetic via
2.) Sympthetic and visceral sensory via
3.) Somatic afferent fibers via

1.) Vagus nerves
2.) Greater splanchnic nerves
3.) Phrenic nerve

55

The physiological sphincter at the esophogastric junction is controlled by

Vagal innervation

56

What is the parasympathetic innervation of the stomach?

anterior and posterior vagal trunks --> celiac plexus --> intrinsice (enteric) ganglia

57

What does parasympathetic innervation to the stomach do?

Increases motility and acid secretion

58

What is the sympathetic innervation of the stomach?

T6-9 --> Greater splanchnic --> celiac ganglia --> celiac plexus

59

What is the parasympathetic and reflex afferent innervation to the appendix?

Vagus nerve

60

What is the sympathetic and visceral sensory innervation of the appendix?

T10 spinal cord segment

61

Responsible for regulating peristalsis

Myenteric (Auerbach's) Plexus

62

For the parasympathetic system, what is the preganglionic cell body location?

Brainstem (vagus) and S2-S4 (pelvic splanchnic)

63

For the parasympathetic system, what is the postganglionic cell body location?

Terminal ganglia

64

For the sympathetic system, what is the preganglionic cell body location?

Lateral horn of T5-L2

65

For the sympathetic system, what is the postganglionic cell body location?

Prevertebral ganglia

66

Caused by mutation of the RET gene which causes failure of neural crest cell migration to enteric plexuses

Aganglionic megacolon (Hirschsprung's Disease)

67

In Hirschsprung's the aganglionic (Myenteric Plexus) bowel segment becomes constricted and the proximal segment becomes

Dilated

68

What is the path of sympathetic innervation to the G-I system starting from the lateral horn of T5-L2?

Lateral horn, through the ventral root, into the ventral ramus, through the white rami communicans into the paravertebral canal, and through the splanchnic nerve into the prevertebral ganglion (synapse) and onto the organ

69

What is the embryonic region for
1.) T5-T9
2.) T10-T11
3.) T12
4.) L1-L2

1.) Foregut
2.) Midgut
3.) Midgut
4.) Hindgut

70

In the foregut sympathetic innervation, preganglionic fibers in the greater splanchnic nerves synapse on postganglionic neurons in the

Celiac ganglia

71

In the midgut sympathetic innervation, preganglionic fibers in the lesser thoracic splanchnic nerves sinapse on postganglionic neurons in the

Superior mesenteric ganglia

72

In the hindgut sympathetic innervation, preganglionic fibers in the lumbar splanchnic nerves synapse on postganglionic fibers in the

Inferior mesenteric ganglia

73

The post ganglionic fibers are then distributed to the organ wall/enteric plexus on the branches of the

Inferior mesenteric artery

74

What is the embryonic region for the parasympathetic nerves with cell bodies located in
1.) Brainstem
2.) S2-S4

1.) Foregut and midgut
2.) Hindgut

75

In the foregut parasympathetic innervation, preganglionic fibers in anterior and posterior vagal trunks synapse on postganglionic neurons in

Enteric ganglia

76

In the midgut parasympathetic innervation, preganglionic fibers in vagal trunks pass through superior mesenteric ganglia and synapse on cell bodies in the

Enteric plexus

77

In the hindgut parasympathetic innervation, preganglionic fibers in pelvic splanchnic nerves (S2-S4) are distributed on

-synapse on cell bodies in enteric plexus

Arteries within mesentery of rectum and colon

78

In the foregut, postganglionic sympathetic and parasympathetic fibers are distributed by traveling on the

Celiac trunk

79

In the midgut, sympathetic (postganglionic) and parasympathetic (preganglionic) fibers are distributed by traveling on the

Superior mesenteric artery

Decks in Structure and Function Test 1 Class (61):