Gross Anatomy of Autonomic Nervous System Flashcards Preview

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Flashcards in Gross Anatomy of Autonomic Nervous System Deck (24):
1

GVE

general visceral efferent fibers
controlling INVOLUNTARY FUNCTIONS- like vascular tone, glandular secretions

2

what are gve fibers accompanied by

GVA - general visceral afferent

3

GVA

general visceral affarent - accompany the GVE fibers and carry pain information to the CNS and represent the afferent limb of the auotonomic reflex

4

General organization of the ANS (autonomic nervous system)

Sympathetic and Parasympathetic Divisions - both consist of a two neuronal chain
FIRST SOMA neuron = CNS
SECOND SOMA = PNS

5

major characteristic of the pre ganglionic neuron in the CNS

MYELINATED

6

GVE make up what

general visceral efferent for the cranial and spinal nerves

7

Soma of the pre-ganglionic sympathetic neurons

LATERAL HORN of the spinal cord (intermerdiolateral cell column) T1-L2/L3

8

Preganglionic sympathetic fibers leave..

anterior horn of spinal cord

9

Three things Preganglionic sympathetic fibers do when leave ...

1. Synapse in sympathetic chain at same level
2. Ascend or descend in the sympathetic chain/trunk prior to synapsing at a different level
3. PASS THROUGH the sympathetic chain WITHOUT SYNAPSING and travel to prevertebral ganglia
like celiac, superior mesenteric, inferior-mesenteric, aorticorenal

10

what forms the sympathetic chain ganglia

Soma of the postganglionic sympathetic neurons

11

Sympathetic ganglia

3 cervical - superior middle and inferior cervical
10-12 thoracic ganglia
4 lumbar
4-5 sacral

12

locations of the cervical ganglia
superior, middle, and inferior

superior - c1-c2
middle - C6 at cricoid cartilage
inferior- c7

13

stellate ganglia

in about 80% of individuals C7 ganglia and and T1 ganglia are fused forming this stellate ganglia

14

T/F parasympathetic fibers do NOT travel to limbs or body wall.
elaborate on the fact

TRUE -
POST GANGLIONIC SYMPATHETIC they course to all spinal nerves- and into most of the nerves that course into extremities and along the body wall (like intercostal nerves)
AND to blood vessels, sweat glands, arrector pili muscles - and virtually reach all parts of body
NO INNERVATION AT AVASCULAR TISSUE AND CARTILAGE AND NAILS

IT IS THE PARASYMPATHETIC FIBERS THAT DO NOT TRAVEL TO THE LIMBS OR BODY WALL

15

Fibers in dental plexus

GVE- general visceral efferent

16

what fibers does the dental pulp receive? what do they control?

receives postganglionic sympathetic fibers from the superior cervical ganglion
The GVE fibers enter the pulp cavity along the blood vessesl and control vascular tone
may be GSA - transmit pain
may be GVA - provide CNS with information regarding the vascular tone

17

Superior cervical ganglion

receives preganglionic sympathetic fibers from T1-T3 spinal cord levels
Fibers will ascend in the sympathetic chain until they hit the superior cervical - location of synapse

18

post-ganglionic sympathetic fibers of the superior cervical ganglion leave and do what? (5 things)

when they leave - they 1. form the internal carotid plexus. Course along the ICA (internal carotid artery) to enter the cranial cavity - distributed with cranial nerves
2. form the external carotid plexus
3. course to the carotid body and carotid sinus (chemoreceptors and baroreceptors)
4. contribute to C1-C4 spinal nerves
5. contribute to the cardiac plexus via the cardiopulmonary splanchnic nerve

19

external carotid plexus

formed from the postganglionic sympathetic fibers that leave the superior cervical ganglion and course along with the ECA (external carotid artery) into the face

20

innervation to carotid body and sinus?

from postganglionic sympathetic fibers that leave the superior cervical ganglion

21

innervation of C1-C4 spinal nerves?

post ganglionic sympathetic fibers from the superior cervical ganglion

22

cardiac plexus and cardiopulmonary splanchnic nerve form from?

the post ganglionic sympathetic fibers from the superior cervical ganglion

23

middle cervical ganglion (pre and post)

smallest and may be absent
receives pregnaglionic sympathetic fibers from T1-T3 (maybe T4 and T5)
post ganglionic fibers from here fo and form the 1. C5 and C6 spinal nerves
2. cardiac plexus via the cardiopulmonary splanchnic neuron

24

inferior cervical ganglion

aka the stellate ganglion if fused with T1
mainly receives preganglionic sympathetic fibers from T1-T3 and post ganglionic give rise to 1. C7 and C8 spinal nerves and 2. the cardiac plexus via the cardiopulmonary splanchnic neuron