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Published byHenry Norton Modified over 9 years ago
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THE AUTONOMIC NERVOUS SYSTEM D. C. MIKULECKY PROFESSOR OF PHYSIOLOGY
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ORGANIZATION OF THE NERVOUS SYSTEM BRAIN SPINAL CORD CENTRAL NERVOUS SYSTEM (CNS) PERIPHERAL NERVOUS SYSTEM AFFERENT NERVES EFFERENT NERVES EXTERO- RECEPTORS INTERO- RECEPTORS SOMATICAUTONOMIC EFFECTOR ORGANS SKELETAL MUSCLES SMOOTH AND CARDIAC MUSCLES AND GLANDS
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THE AUTONOMIC NERVOUS SYSTEM TWO NEURON CHAINS SYMPATHETIC PARASYMATHETIC
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ORGANIZATION OF THE AUTONOMIC NERVOUS SYSTEM SYMPATHETIC GANGLIA TARGET ORGANS BRAIN SPINAL CORD PARASYMPATHETIC GANGLIA
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TWO NEURON CHAINS SPINE EFFECTOR ORGAN PRESYNAPTIC NEURON POSTSYNAPTIC NEURON
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SYMPATHETIC SPINE EFFECTOR ORGAN SYMPATHETIC GANGLIA (NEAR SPINE)
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PARASYMPATHETIC SPINE EFFECTOR ORGAN PARASYMPATHETIC GANGLIA (NEAR EFFECTOR ORGAN)
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AUTONOMIC CONTROL IS IN BRAIN STEM HYPOTHALAMUS PITUITARY PONS MEDULLA
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PARASYMPATHETIC GANGLION NEAR EFFECTOR ORGAN LONG PREGANGLIONIC NEURONS SHORT POSTGANGLIONIC NEURONS “COUCH POTATO” POSTGANGLIONIC NEURONS ARE CHOLINERGIC CRANIAL AND SPINAL NERVES
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SYMPATHETIC GANGLION NEAR SPINE SHORT PREGANGLIONIC NEURONS LONG POSTGANGLIONIC NEURONS FLIGHT OR FIGHT POSTGANGLIONIC NEURONS ARE ADRENERGIC THORACIC AND LUMBAR NERVES
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EFFECTS OF ANS
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DUAL INNERVATION OF MOST VISCERAL ORGANS MOST INNERVATED BY BOTH SYSTEMS EFFECTS ARE OPPOSITE IN MOST CASES TONIC ACTIVITY DOMINANCE
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EFFECTS OF PRE AND POSTGANGLIONIC NEUROTRANSMITTERS: PHYSIOLOGY AND PHARMACOLOGY NOREPINEPHRINE (ADRENERGIC):FLIGHT OR FIGHT REACTION (SYMPATHETIC POSTGANGLIONIC) ACETYLCHOLINE (CHOLINERGIC): “COUCH POTATO” RESPONSE (PARASYMPATHETIC POSTGANGLIONIC AND ALL PREGANGLIONIC).
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NICOTINIC RECEPTORS (PREGANGLIONIC) MUSCARINIC RECEPTORS (POSTGANGLIONIC)
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NICOTINIC RECEPTORS (PREGANGLIONIC) ACTIVATED BY ACETYL CHOLINE ENDOGENOUSLY AND NICOTINE EXOGENOUSLY BLOCKED BY CURARE AND HEXAMETHONIUM
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MUSCARINIC RECEPTORS (POSTGANGLIONIC) ACTIVATED BY ACETYL CHOLINE ENDOGENOUSLY AND MUSCARINE EXOGENOUSLY BLOCKED BY ATROPINE
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THE ADRENAL MEDULLA SECRETES EPINEPHRINE ANALOG TO A LARGE POST GANGLIONIC SYMPATHETIC NERVE TERMINAL IS AN ENDOCRINE GLAND: SECRETES THE HORMONE INTO THE BLOOD
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TYPES OF RECEPTORS ALPHA: MORE SENSITIVE TO NOREPINEPHRINE BETA: MORE SENSITIVE TO EPINEPHRINE
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ALPHA RECEPTORS ALPHA-1: POSTSYNAPTIC TARGET CELLS OF SYMPATHETICALLY INNERVATED ORGANS ALPHA-2: PRESYNAPTIC TERMINALS OF CHOLINERGIC NERVE FIBERS
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BETA RECEPTORS BETA-1: EPINEPHRINE AND NE EQUALLY POTENT BETA-2: RESPOND BETTER TO EPINEPHRINE THAN TO NE (PROBABLY TO CIRCULATING HORMONE THAN TO NEUROTRANSMITTER)
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FACTORS AFFECTING THE CONCENTRATION OF NE IN THE JUNCTIONAL CLEFT NEURONAL UPTAKE DIFFUSION INTO CAPILARIES UPTAKE INTO EFFECTOR CELLS
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AUTONOMIC REFLEXES REFLEX ARCS MIMIC SOMATIC SPINAL REFLEXES DEFICATION AND URINATION AMONG OTHERS
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REFERRED PAIN PAIN PATHWAYS FROM VISCERA SHARE SECONDARY NEURONS WITH SOMATIC PAIN NEURONS HYPERALGESIC ZONES
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