PART 5 THE AUTONOMIC NERVOUS SYSTEM Unit 3
- Slides: 36
PART 5 THE AUTONOMIC NERVOUS SYSTEM Unit 3 Communication and Control
Nervous System Divisions
A. INTRODUCTION
The Autonomic Nervous System Autonomic = visceral A subdivision of the PNS Sympathetic, parasympathetic and enteric divisions Regulates Glands Smooth muscle Cardiac muscle ANS activities are automatic (involuntary)
i. CLICKER Your client is prescribed a medication that targets the autonomic nervous system. Which effector will NOT be directly affected? a) b) c) d) Cardiac muscle Glands Smooth muscle Skeletal muscle
Review of SNS Voluntary and reflexive movements If somatic neurons stop = all communication with effector stops
The Autonomic Nervous System ANS components similar to those in SNS Sensory Receptor (intero, chemo, mechano) Autonomic Sensory Neuron Integrating Center Table 15. 1 Autonomic (preganglionic) Motor Neuron Effector Autonomic (postganglionic) Motor Neuron
i. CLICKER How many neurons are in an autonomic motor pathway ? a) b) c) d) 1 2 3 4
ANS Focuses on Efferent System Autonomic pathways = two motor neurons connecting SC effector Preganglionic Motor Neuron SC or brainstem (cell body) ganglion Myelinated Postganglionic Motor Neuron Ganglion (cell body) effector Unmyelinated NOTE: SNS has uninterrupted synapse
B. ANATOMY OF THE ANS Most organs have dual innervation
Sympathetic Nervous System
Sympathetic Nervous System Autonomic motor neurons Spinal cord Sympathetic preganglionic neuron (myelinated) Autonomic ganglion NE Sympathetic postganglionic neuron (unmyelinated) Effectors: glands, cardiac muscle, smooth muscle (e. g. , in urinary bladder)
Sympathetic Nervous System Exception to typical SANS system
Sympatheti c Chains
Sympathet ic Ganglia Right sympathetic trunk ganglion CELIAC GANGLION SUPERIOR MESENTERIC GANGLION INFERIOR MESENTERIC GANGLION Right sympathetic trunk ganglion Anterior view
Figure 15. 2 Structure of the Sympathetic ANS
i. CLICKER Which nerves carry sympathetic motor output? a) b) c) cranial nerves spinal nerves cranial nerves and spinal nerves
i. CLICKER Which neurotransmitter is released by sympathetic postganglionic neurons? a) b) c) d) acetylcholine epinephrine norepinephrine both b) and c)
Parasympathetic Nervous System
Parasympathetic Nervous System Autonomic ganglion Spinal cord Parasympathetic preganglionic neuron (myelinated) ACh Parasympathetic postganglionic neuron (unmyelinated) Effectors: glands, cardiac muscle, smooth muscle
Terminal ganglia
Figure 15. 3 Structure of the Parasympathe tic ANS
i. CLICKER Which nerves carry parasympathetic motor output? a) b) c) cranial nerves spinal nerves cranial nerves and spinal nerves
i. CLICKER Which neurotransmitter is released by parasympathetic postganglionic neurons? a) b) c) d) acetylcholine epinephrine norepinephrine both b) and c)
Enteric Nervous System Nerves & ganglia Wall of GI tract, pancreas, gallbladder GI tract needs to respond to environmental stimuli to fnc (like skin) ENS usually fnc independently from CNS
ANS Receptors
ANS Receptors
i. CLICKER Which receptor is found on effector cells of the parasympathetic nervous system? a) b) c) d) alpha beta muscarinic nicotinic
C. PHYSIOLOGY OF THE ANS
Autonomic Reflexes Interoreceptor Sensory Neuron Integrating Center Preganglionic. N euron Effector Postganglionic Neuron
Pupillary Light Reflex
Pupillary Light Reflex
The Effect of Higher Brain Centers on ANS Functions
D. FUNCTIONS OF THE ANS
Sympathetic Responses Four Es
Parasympathetic Responses SLUDD
- Somatic motor pathway
- Autonomic nervous system pathway
- Autonomic nervous system consists of
- Ans
- Ans
- Autonomic nervous system
- The autonomic nervous system controls
- Visceral nervous system
- Autonomic nervous system
- Nervous system main division
- Neuronal pool
- Sensory input and motor output
- Nerve cell process
- Chemical synapses
- Cns diagram
- Autonomic nerveous system
- Basic unit of nervous system
- Homeostasis positive feedback examples
- Subthalamus
- Nervous system and digestive system
- Endocrine system vs nervous system
- Endocrine vs nervous system venn diagram
- Endocrine system and nervous system
- Anal wink reflex
- Visceral reflex arc in order
- Preganglionic and postganglionic parasympathetic neurons
- Autonomic network management
- An architectural blueprint for autonomic computing
- Autonomic drugs
- Autonomic drugs
- The vision of autonomic computing
- Hypothalamus ans
- Autonomic state
- Autonomic computing ibm
- Diabetic autonomic neuropathy
- Autonomic bladder
- Autonomic decision making