The somatic nervous system is part of the peripheral nervous system, which is the entire nervous system outside the brain and spinal cord. In particular, the somatic nervous system is responsible for the movements of voluntary muscles and a process name is a reflex arc. This system transfers nerve impulses back and forth between the central nervous system, which is the brain and spinal cord as well as skeletal muscles, skin and sensory organs. One of the most composite systems in the body is the nervous system. In this lesson you will learn about the somatic nervous system and how important the body’s functions are. Examples and illustrations will provide to facilitate the understanding Somatic Nervous System function. The somatic nervous system plays a very important role in bringing the ball to the alley – especially if you want to strike.
Somatic Nervous System function
The basic role of the somatic nervous system is to connect the central nervous system with organs, muscles and the skin. This enables you to perform compound movements and behaviors. Somatic neurons carry messages from external areas of the body that are related to the senses. It’s like moving from the environment to the central nervous system. Sensory/afferent neurons carry impulses to the central nervous system and the brain. After processing by the central nervous system, the somatic motor or efferent neurons receive a signal to the muscles and organs of the senses.
Remember the pairs of nerves described above under the parts of the somatic nervous system. Some of the nerve pairs only have sensory neurons, such as those that involve in sense of smell and vision. Others have only motor neurons, such as those involved in the movement of the eyeball (not seeing) and hearing. In somatic nervous system function, some pairs of nerves have both sensory and motor neurons, such as those associated with taste and some aspects of swallowing.
Parts of the somatic nervous system
The somatic system consists of two different types of neurons, which are also called nerve cells. Two types of neurons are sensory neurons or afferent neurons that transmit messages to the central nervous system and motor neurons, also called outgoing neurons that transmit information from the central nervous system to additional zone of the body. The neuron has a body and axon; The body of the neuron is located in the central nervous system. The axon is embedded in the skeletal muscles, sensory organs or skin.
Now we will talk about how the somatic nervous system fits the peripheral nervous system. In the peripheral nervous system there are 12 pairs of cranial nerves and 31 pairs of spinal nerves, which are composed of sensory neurons and motor neurons. Some pairs of nerves have only sensory cells, some have only motor cells, and still, others have both sensory and motor cells. Cellular nerve cells are somatic or autonomous. Because this lesson is about the somatic nervous system, we will not discuss autonomic nerve cells in detail.