AUTONOMIC NERVOUS SYSTEM

1
AUTONOMIC NERVOUS SYSTEM

• PNS Visceral Efferent to smooth muscle, cardiac
  muscle, gland
• Preganglionic Neuron
• Postganglionic Neuron

2
(No Transcript)
3
ANS

• Preganglionic neuron White
• Postganglionic neuron - Gray

4
(No Transcript)
5
(No Transcript)
6
SYMPATHETIC Division

• Expends Energy
• Preganglionic Neurons
• T1-L2

7
(No Transcript)
8
Sympathetic Pathway

• White Ramus Communicans
• Gray Ramus Communicans

9
(No Transcript)
10
(No Transcript)
11
Sympathetic Pathway

• Directly synapses with postganglionic neuron

12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
Sympathetic Pathway

• Sympathetic Chain Ganglia
• Sympathetic Trunk

17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
Sympathetic Pathway

• Through Chain Ganglia to
• Collateral Prevertebral Ganglia
• Splanchnic Nerves
• Celiac Ganglion
• Superior Mesenteric Ganglion
• Inferior Mesenteric Ganglion

21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
Sympathetic Pathway

• Adrenal Medulla
• Preganglionic Neuron only (the exception)

26
(No Transcript)
27
(No Transcript)
28
Sympathetic Pathway

• Divergence

29
(No Transcript)
30
PARASYMPATHETIC Division

• Conserves Energy
• Brain Stem (III, VII, IX, X)
• S2-S4 via Pelvic Splanchnic Nerves
• Not to skin or blood vessel

31
(No Transcript)
32
(No Transcript)
33
Comparisons between SNS and PNS
34
(No Transcript)
35
Neurotransmitters

• Acetylcholine
• Cholinergic
• Pre- and Postganglionic neurons in PNS
• Preganglionic in SNS

36
(No Transcript)
37
Neurotransmitters

• Norephinephrine
• Adrenergic
• Postganglionic fiber in SNS

38
(No Transcript)
39
(No Transcript)
40
Neurotransmitters

• Adrenal Medulla
• Norepinephrine
• Epinephrine
• Exaggerates the fight or flight response

41
Receptors - Acetylcholine

• Muscarinic
• Blocked by Atropine
• Nicotinic
• Blocked by curare in SOMATIC system only

42
(No Transcript)
43
Receptors Norepinephrine/Epinephrine

• Alpha
• Alpha 1 most common
• Stimulatory response constricts muscle
• Responds to Epi and Norepi

44
(No Transcript)
45
Receptors Norepinephrine/Epinephrine

• Beta 1
• Heart
• Stimulatory
• Responds to Epi and Norepi
• Propanolol is a Beta 1 BLOCKER

46
Receptors Norepinephrine/Epinephrine

• Beta 2
• Most common Beta receptor
• Generally inhibitory
• Responds ONLY to Epi

47
(No Transcript)
48
(No Transcript)
49
FUNCTIONS

• Heart
• Airways
• Digestive Structures
• Pupil
• Sweat Glands

50
FUNCTIONS

• Adrenal medulla
• SNS causes release of Epi and Norepi
• Urinary bladder
• SNS Wall relaxes and sphincter contracts
• PNS Wall contracts and sphincter relaxes

51
FUNCTIONS

• Cutaneous Blood vessels
• Abdominal Blood vessels
• Skeletal Muscle Blood vessels

52
CONTROLS of ANS