Notes on the Nervous System

Introduction to the Nervous System

Functions of the Nervous System

• The nervous system plays a critical role in detecting stimuli and initiating appropriate responses.

Major Functions

• Sensory function: Responsible for sensing internal and external changes in the environment.

• Integrative function: Involves analyzing and storing sensory information to make decisions regarding appropriate behaviors.

• Motor function: Involves responding to sensory stimuli through muscle and gland activity.

Nervous System Divisions

• Cranial Nervous System

  • Comprises the brain and spinal cord.

  • Functions include:

    • Integration of different pieces of sensory information.

    • Generation of thoughts and emotions, often linked to memory processes.

    • Origin of impulses that regulate muscle and gland activities.

• Peripheral Nervous System

  • Consists of cranial nerves and spinal nerves, serving as pathways for signals between the Central Nervous System and the rest of the body.

Summary of Key Components

• The nervous system enables detection of environmental changes, processes information, and elicits bodily responses through its various divisions and functions.