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What is a Nervous System?

What is a Nervous System?

Nervous System

Nervous System

The nervous system coordinates body functions through its complex network of nerve cells, enabling sensation and movement. It is divided into two primary parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is composed of the brain and the spinal cord. The brain acts as the body's control center, processing sensory information and coordinating responses. The spinal cord functions as a major signaling pathway for the brain and the rest of the body.

Organization of the Nervous System

Organization of the Nervous System

The nervous system is one of the most complex systems in our body. It is organized into two main divisions: the central nervous system (CNS) and the peripheral nervous system (PNS).
The CNS, comprising the brain and spinal cord, houses billions of neurons. The brain is housed in the skull, while the spinal cord is linked to the brain through the foramen magnum of the occipital bone and is surrounded by the protective structure of the vertebral column. It is responsible for processing various...

Autonomic Nervous System: Overview

Autonomic Nervous System: Overview

The human nervous system is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is composed of the brain and spinal cord, while the PNS contains nerve cells, clusters of nerve cells, and the sensory receptors that are outside the CNS. The PNS has two types of nerve cells: sensory (afferent) and motor (efferent). Sensory cells send signals to the CNS from receptors, and motor cells carry signals from the CNS to organs, muscles, and...

Functions of the Nervous System

Functions of the Nervous System

The nervous system is responsible for coordinating and regulating the body's functions. It functions through three main processes: sensory, integrative, and motor processes. Sensory function involves the detection and transmission of information about internal and external stimuli from sensory receptors to the CNS. The CNS processes this information through an integrative function, where it interprets and makes decisions based on the incoming sensory information. Finally, the motor function...

Functional Divisions of the Nervous System

Functional Divisions of the Nervous System

The nervous system, responsible for sensing, integrating, and responding to various stimuli, is divided into the central nervous system (CNS) and the peripheral nervous system (PNS). The PNS has two functional divisions: the sensory or afferent division and the motor or efferent division.
The sensory division transmits information from sensory receptors in the body to the CNS. It provides the CNS with knowledge about somatic senses (such as tactile, thermal, pain, and proprioceptive sensations)...

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Nervous system: part 3.

Alistair Farley¹, Ella McLafferty, Carolyn Johnstone

¹School of Nursing and Midwifery, University of Dundee, Dundee, Scotland.

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|April 17, 2014

Summary

This summary is machine-generated.

This article details the peripheral nervous system, covering its major divisions like motor and sensory nerves, cranial nerves, and spinal nerves. It also explores the autonomic nervous system and spinal reflexes for homeostasis.

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Area of Science:

Neuroscience
Life Sciences

Background:

This article is the final in a three-part series on the nervous system.
It focuses specifically on the peripheral nervous system's structure and function.

Purpose of the Study:

To explore the major divisions of the peripheral nervous system.
To describe motor and sensory nerves, cranial nerves, and spinal nerves.
To examine the autonomic nervous system and its divisions.

Main Methods:

Descriptive review of the peripheral nervous system.
Explanation of nerve types and functions.
Discussion of autonomic nervous system divisions (parasympathetic and sympathetic).

Main Results:

Detailed examination of cranial and spinal nerves.
Exploration of the autonomic nervous system's roles.
Identification of spinal reflexes in maintaining homeostasis.

Conclusions:

The peripheral nervous system comprises motor and sensory pathways.
The autonomic nervous system regulates involuntary functions via sympathetic and parasympathetic actions.
Spinal reflexes are crucial for maintaining bodily equilibrium, with disorders like motor neurone disease impacting peripheral nerve function.