What are the four major components of the central nervous system?

What are the four main components of the nervous system?

The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts.

What are the major components of the CNS and PNS?

The central nervous system includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs.

What are the parts of the central nervous system and their functions?

The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.

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What are the major functions of the CNS?

The central nervous system (CNS) functions as the processing center for the nervous system. It receives information from and sends information to the peripheral nervous system. The brain processes and interprets sensory information sent from the spinal cord.

What organs are in nervous system?

The anatomy of the nervous system in humans consists of the brain and spinal cord, along with the primary sense organs and all the nerves associated with these organs. The brain and the spinal cord form the central nervous system (CNS).

What is nervous system and its function?

The nervous system is involved in receiving information about the environment around us (sensation) and generating responses to that information (motor responses). The nervous system can be divided into regions that are responsible for sensation (sensory functions) and for the response (motor functions).

What is the main component of the nervous system?

The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

What is the main difference between CNS and PNS?

The CNS consists of the brain and spinal cord, while the PNS includes all other nervous system tissue. All sensory receptors, sensory neurons and motor neurons are part of the PNS.

What are the 6 main components of PNS?

Contents

  • 1.1 Somatic nervous system. 1.1.1 Cervical spinal nerves (C1–C4) 1.1.2 Brachial plexus (C5–T1) 1.1.3 Lumbosacral plexus (L1–Co1)
  • 1.2 Autonomic nervous system. 1.2.1 Sympathetic nervous system. 1.2.2 Parasympathetic nervous system. 1.2.3 Enteric nervous system.
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What is an example of the central nervous system?

For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain. … The central nervous system (CNS) includes the nerves in the brain and spinal cord. It is safely contained within the skull and vertebral canal of the spine.

What happens if the central nervous system is damaged?

You may experience the sudden onset of one or more symptoms, such as: Numbness, tingling, weakness, or inability to move a part or all of one side of the body (paralysis). Dimness, blurring, double vision, or loss of vision in one or both eyes. Loss of speech, trouble talking, or trouble understanding speech.

What are the top 3 common nervous system disorders?

Nervous system diseases

  • Alzheimer’s disease. Alzheimer’s disease affects brain function, memory and behaviour. …
  • Bell’s palsy. Bell’s palsy is a sudden weakness or paralysis of facial muscles on one side of the face. …
  • Cerebral palsy. …
  • Epilepsy. …
  • Motor neurone disease (MND) …
  • Multiple sclerosis (MS) …
  • Neurofibromatosis. …
  • Parkinson’s disease.

Why the nervous system is the most important?

The nervous system plays a role in nearly every aspect of our health and well-being. It guides everyday activities such as waking up; automatic activities such as breathing; and complex processes such as thinking, reading, remembering, and feeling emotions. The nervous system controls: Brain growth and development.

How does the central nervous system affect behavior?

The central nervous system has a fundamental role in the control of behavior. It contains the brain and the spinal cord which are both encased in bone which shows their importance. Both the brain and spinal cord receive signals from the afferent neurons and send signals to muscles and glands through efferent neurons.

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