PNS Autonomic Organisation¶

graph TD 
  X(Autonomic Nervous System) ==> x1[Parasympathetic];
  X==> x2[Sympathetic];

Nerves of Autonomic Nervous System¶

graph TD
    X{Autonomic Nerves} ==> x1{Sensory nerves};
    x1 ==> x1a[Senses Bp etc.. ];
    X ==> x2{Motor Nerves};
    x2 ==> x2a[for smooth muscle contraction to raise Bp];

Cell organisation of Sympathetic Nervous System¶

graph TD
  X(Sympathetic Motor) ==>xx{2 nerve pathway= Pre-synaptic,Post-synaptic};
  xx ==>|Pre-synaptic Axon leaves from lateral Horn of spine| X1[Pre-synaptic ]
  X1 ==>|Post-synaptic ganglion parallel to vertebra| x1a[Para-Vertebral= parallel to Para-Vertebra];
  X1 ==>|Post synaptic ganglion @| x1b[Pre-vetebral ganglion = in front of spine ];

|Characteristics|DRG|Sympathetic-Ganglion|Parasympathetic Ganglion| |---------|---------|---------|------| |Neurophil|less = no axon dentrite connection|prominent = axon dentrite connection|same as Sympathetic-Ganglion| |shape|round= only one axon coming out|irregular = many dentrites and axon|| |satellite cells|surrounding completely|irregularly surrounding||

Cell Organisation of Parasympathetic¶

graph TD
  X{Parasympathetic nerves} ==> x1[2 neuron pathway];
  x1 ==>|Pre-synaptic| x1a[from brain stem and sacral];
  x1a ==>|Post-ganglion| x1a1[very near the target organ ];