AUTONOMIC NERVOUS SYSTEM GENERAL CONSIDERATIONS MS Nageswararao Dept

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AUTONOMIC NERVOUS SYSTEM GENERAL CONSIDERATIONS MS. Nageswararao Dept. of Medical Pharmacology

AUTONOMIC NERVOUS SYSTEM GENERAL CONSIDERATIONS MS. Nageswararao Dept. of Medical Pharmacology

NERVOUS SYSTEM CNS PNS somatic autonomic

NERVOUS SYSTEM CNS PNS somatic autonomic

Differences between Autonomic nervous system 1. Auto: Self; nomos: governing; Somatic nervous system 1.

Differences between Autonomic nervous system 1. Auto: Self; nomos: governing; Somatic nervous system 1. It is under voluntary control. This system is involuntary and maintains homeostasis 2. Each autonomic fibre is made up of two neurons arranged in series. 3. ANS innervates the heart , smooth muscles and exocrine glands 4. ANS controls visceral functions such as circulation, digestion, excretion etc. 2. Each somatic fibre is made up of single motor neuron, which connects the CNS to the skeletal muscle 3. It innervates the skeletal muscle 4. It controls the skeletal muscle tone

5. Nerve fibres pregang – myelinated postgang-non myelinated 5. Nerve fibres are myelinated 6.

5. Nerve fibres pregang – myelinated postgang-non myelinated 5. Nerve fibres are myelinated 6. Efferent transmitter is Ach and noradrenaline 6. Acetylcholine

 • NEUROHUMORAL TRANSMISSION • Neurohumoral transmission implies that nerves transmit their message across

• NEUROHUMORAL TRANSMISSION • Neurohumoral transmission implies that nerves transmit their message across synapses and neuroeffector junctions by the release of humoral (chemical) messengers • STEPS IN NEUROHUMORAL TRANSMISSION: • 1) Impulse conduction • 2) Transmitter release • 3) Transmitter action on post synaptic membrane • 4) Post junctional activity • 5) Termination of transmitters

THANK YOU

THANK YOU