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    Ans Ans Presentation Transcript

    • ANS Prof. Vajira Weerasinghe Dept of Physiology
    •  
    • Sympathetic vs parasympathetic
      • Distribution on different organs
      • Actions on different organs
      • Drugs acting on receptors
      • Reflexes in different systems
    • Sympathetic vs parasympathetic
      • Distribution on different organs
    • Fig. 9.6
    • Sympathetic (Thoracolumbar) Division
      • Preganglionic cell bodies in lateral horns of spinal cord T1-L2: thoracolumbar
      • Preganglionic axons pass through ventral roots to white rami communicantes to the retroperitoneal sympathetic chain ganglia
    • Parasympathetic (Craniosacral) Division
      • Preganglionic cell bodies in nuclei of brainstem or lateral parts of spinal cord gray matter from S2-S4
        • Preganglionic axons from brain pass to terminal ganglia through cranial nerves III, VII, IX and X
        • Preganglionic axons from sacral region pass through pelvic nerves to terminal ganglia
      • Terminal ganglia located near organ innervated or embedded in wall of organ
    •  
    •  
    • Sympathetic vs parasympathetic
      • Actions on different organs
    •  
    • Sympathetic vs parasympathetic
      • Drugs acting on receptors
    • Parasympathetic Sympathetic
    •  
    •  
    •  
    • salbutamol
    • Sympathetic vs parasympathetic
      • Reflexes in different systems
    • ANS reflexes
      • CVS:
        • baroreceptor reflex
        • Control of heart rate
        • chemoreceptor reflex
      • GIT:
        • GIT secretions and motility
      • Other:
        • Urinary bladder control
        • Sexual reflexes
        • Sweating
        • Other visceral reflexes