What is the major function of the peripheral nervous system?
The PNS has three basic functions: (1) conveying motor commands to all voluntary striated muscles in the body; (2) carrying sensory information about the external world and the body to the brain and spinal cord (except visual information: the optic nerves, which convey information from the retina to the brain, are in …
What are the main parts of the peripheral nervous system and their function?
The PNS consists of the nerves and ganglia outside the brain and spinal cord. The main function of the PNS is to connect the CNS to the limbs and organs, essentially serving as a relay between the brain and spinal cord and the rest of the body.
What are the two main divisions of the peripheral nervous system?
Peripheral Nervous System. The peripheral nervous system is divided into two major parts: the somatic nervous system and the autonomic nervous system.
How is nervous system classified?
The nervous system is classified into the central and peripheral nervous system. The central nervous system (CNS) consists of the brain and spinal cord, leaving everything else in the peripheral nervous system (PNS).
Which is not part of the central nervous system?
The other part of the nervous system is called the peripheral nervous system (PNS). This is made up of all the parts of the nervous system that are not part of the CNS.
Is the brainstem part of the central nervous system?
The CNS includes the brain, brain stem, and spinal cord, while the PNS includes all other sensory neurons, clusters of neurons called ganglia, and connector neurons that attach to the CNS and other neurons.
What part of the brain controls the central nervous system?
The pons and the medulla, along with the midbrain, are often called the brainstem. The brainstem takes in, sends out, and coordinates the brain’s messages. It also controls many of the body’s automatic functions, like breathing, heart rate, blood pressure, swallowing, digestion, and blinking.
Why brain and spinal cord are considered as central nervous system?
The central nervous system consists of the brain and spinal cord. It is referred to as “central” because it combines information from the entire body and coordinates activity across the whole organism.
What is central nervous system and its function?
The central nervous system CNS is responsible for integrating sensory information and responding accordingly. It consists of two main components: The spinal cord serves as a conduit for signals between the brain and the rest of the body. It also controls simple musculoskeletal reflexes without input from the brain.
What would happens if the somatic nervous system is damaged?
Diseases of the Somatic Nervous System Diseases that impact the peripheral nerve fibers of the somatic nervous system can cause what is known as peripheral neuropathy. 4 This leads to nerve damage that causes numbness, weakness, and pain, often in the hands and feet.
What organs are controlled by the somatic nervous system?
The somatic nervous system provides control of skeletal muscle movement. Conscious control of movement originates in the motor cortex (both premotor and primary motor cortex). However, movement is refined and coordinated by various structures in the CNS, including extrapyramidal regions and the cerebellum.
What are the two branches of the somatic nervous system?
The somatic nervous system (SNS or voluntary nervous system) is the part of the peripheral nervous system associated with the voluntary controlof body movements via skeletal muscles. The somatic nervous system consists of afferent nerves or sensory nerves, and efferent nerves or motor nerves.
What is the difference between the somatic and visceral nervous system?
Somatic sensory input comes from the receptors of the eyes, ears, nose, tongue, and skin. These organs transmit information we associate with the five senses. Visceral sensory input comes from (surprise!) the viscera, or internal organs.