Aff erent (centripetal) pathways
Eff erent (centrifugal) pathways
– transmit impulses from the CNS to eff ector organs in the periphery through eff erent neurones
– the eff erent neurone is the (somatomotor or visceromotor) lower motor neuron
– the cell body of the eff erent neuron is located in the spinal cord,
its axon leaves the CNS to form the motor part of the peripheral nerve
1 Somatomotor tracts – innervate striated muscle
2 Visceromotor tracts – innervate smooth muscles and glandular cells
The nervous system constantly monitors changes of external and internal environ-
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