Difference between Somatic Nervous Systems and Autonomic Nervous Systems
Difference between Somatic Nervous Systems and Autonomic Nervous Systems

Difference between Somatic Nervous Systems and Autonomic Nervous Systems

The sensory system gives living beings a chance to feel the transcendence of life, and it works through transferring of signals all through the body to manage different movements and activities. Autonomic and somatic sensory systems are the two primary parts of the peripheral sensory system in view of the ability to deal with the developments of the muscles deliberately.

Somatic Nervous Systems

The somatic nervous system (SONS) is the component of the peripheral nervous system connected with skeletal muscle willful control of movements related to body. The SONS comprises of afferent nerves and efferent nerves. Afferent nerves are in charge of transferring sensation from the body to central sensory system (CNS); efferent nerves are in charge of conveying summons from CNS to body.

 Autonomic Nervous Systems

The autonomic nervous system (ANS) is a component of peripheral nervous system that impacts the function of interior organs. The autonomic sensory system is actually a control framework that demonstrations to a great extent unwittingly and directs functions of body, for example, the heart rate, respiratory rate, digestion, pupillary reaction and urination.

Somatic Nervous Systems VS Autonomic Nervous Systems

This article audits the most essential and fascinating contrasts displayed amongst somatic and autonomic nervous systems.

  • Definition:

Somatic nervous system (SONS) is otherwise called the “Voluntary nervous system”. This nervous system is equipped for dealing with the movements of skeletal muscles intentionally.

Autonomic nervous system (ANS) is otherwise called the involuntary or visceral nervous system which controls the most crucial movement of muscles to support the life of a creature.

  • Structure:

Somatic nervous system comprises of two sections: one is spinal nerves and other is cranial nerves. Spinal nerves are peripheral nerves that convey sensory data into and motor information out of spinal cord.  Cranial nerves are the nerve filaments that convey data out and into of brain stem. They incorporate vision, smell, eye muscles, mouth, ear, taste, shoulders, neck and tongue.

The autonomic nervous system is partitioned into the sympathetic and parasympathetic sensory system. The sympathetic division rises up out of the spinal string in thoracic and lumbar ranges, ending around L2-3. The parasympathetic part has craniosacral “outpouring”, implying that the neurons start at the cranial nerves and sacral (S2-S4) spinal cord.

  • Function:

Functions of somatic nervous system are not so complex.

Functions of autonomic nervous system are more complex than SONS.

  • Vertebrates:

In vertebrates, somatic nervous system includes excitatory neurotransmitters.

In vertebrates, autonomic nervous system has excitatory as well as inhibitory neurotransmitters.

  • Acts:

Somatic nervous system acts dependably on skeletal muscles.

Autonomic nervous system follows up on smooth muscles, cardiovascular muscles, and different glands

  • Efferent neuron:

Somatic nervous system requires one and only efferent neuron.

 Autonomic nervous system ought to have two efferent neurons as well as ganglia to convey a signal.

  • Muscular movement:

Somatic nervous system governs less muscular movements.

Autonomic nervous system governs more muscular actions.


From the above article we can conclude that the somatic and autonomic sensory systems have notable anatomic and basic contrasts that offer ascent to various functions. Somatic nervous system arises from spinal cord while the other one comes from spinal cord as well as from brain.