![]() These are the ganglion situated close to the abdominal cavity.These lies close to the spinal cord and therefore the pre-ganglionic fibres are short.These are the ganglia lie in a vertical row on either side of the vertebral column.It consists of two types of autonomic ganglia.It is called as thoracolumbar division. ![]() The autonomic ganglion is the collection of cell bodies outside the CNS.Its axon is called as post-ganglionic fibres. Post-ganglionic neurons: The second motor neuron which lies after the ganglion and terminates in the effector organ is called as post-ganglionic neuron.The myelinated axon is called as pre-ganglionic fibre. Pre-ganglionic neurons: The first motor neurons which lies before the ganglion is called as pre-ganglionic neuron.Each division has two motor neurons, autonomic ganglia and effector organs.They normally work in the opposite manner.These two divisions have both structural and functional differences.Parasympathetic (Craniosacral outflow) division.Sympathetic (Thoracolumbar outflow) division.The autonomic nervous system is separated into two divisions:.Change in diameter of pupil, dilation or constriction of blood vessels, adjusting the rate and force of heart rate. These regulates visceral activities by either increases or decreases in ongoing activities in their effector tissues (cardiac muscle, smooth muscles or glands).Sensory neurons are responsible for receiving information from sensory receptors to the central nervous system.These neurons are associated with interoceptors which are sensory receptors located in blood vessels, visceral organs, and muscles.The autonomic or involuntary part of the nervous system which controls the autonomic function of the body.Motor neurons innervate the skeletal muscles and lead to voluntary movements. ![]()
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