Enteric Nervous System Flashcards
1
Q
neurons and glial cells of ENS are derived from…
A
neural crest
2
Q
IPAN
A
Intrinsic primary afferent neurons
project from submucosal plexus to myenteric plexus
3
Q
where is the submucosal plexus found?
A
large and small intestine
4
Q
where is the myenteric plexus?
A
b/t inner circular layer and outer longitudinal layer - throughout GI tract
5
Q
Interstitial cells of cajal
A
pacemaker cells of the gut - located in muscular layers of GI tract, mostly in greater curvature
6
Q
causes of nausea and vomiting
A
- INFECTIONS!!!
- toxins
- metabolic disorders
- CNS disorders
- oculovestibular disorders
- pregnancy
- medications
7
Q
common causes of chronic nausea and vomiting
A
- gastroparesis
- intestinal pseudo-obstruction
- psychogenic
8
Q
areas of GI tract affected by scleroderma
A
loss of SM
- esophagus most common
- small intestine next
- NOT stomach
9
Q
Normal colonic motor patterns
A
- Low amplitude contractions: short distances
- High amplitude propagating contractions: longer distances, assoc w/ defecation
