![]() The nervous system consists of two parts- the central nervous system and the peripheral nervous system. From the point of origin, they are cranio-spinal nerves in nature. Thus, the somatic nervous system only consists of motor nerves and helps us to control the voluntary functions of the body. They again are subdivided into three main types: These nerves originate from the lateral horn of the grey matter in the spinal cord. Autonomic nervous system: This system consists of the motor neurons that regulate the involuntary parts of the body. They originate from the anterior horn of the grey matter.Ģ. Somatic nervous system: This system consists of the motor neurons that are supplied to those organs that can be controlled by our own will like the skeletal muscles. The motor neurons are broadly classified into two main types:ġ. Sensory nerves: originate from the posterior horn of grey matter in the spinal cord. On the basis of origin, the peripheral nervous system consists of two parts:Ĭranio-spinal nerves: They again comprise the spinal nerves (12 pairs) and cranial nerves (12 pairs).Īutonomic nerves: They consist of the parasympathetic and sympathetic nerves.Īgain, on the basis of nerve type, i.e., either motor and sensory, the peripheral nerves are again classified into two main types: This part of the nervous system constitutes non-myelinated nerve fibers. The peripheral nervous system is defined as that part of the nervous system that consists of the afferent (sensory) and efferent (motor) nerves, which connect the different parts of the body with the CNS. Hint: This nervous system is actually a part of the peripheral nervous system. ![]()
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