From advertisements for medications to treat depression and other psychiatric conditions to stories about celebrities and their battles with illegal drugs, information about the nervous system is everywhere.
The nervous system controls our perception and experience of the world. Also, directs voluntary movement, seat of our consciousness, personality, learning and memory.
Anatomical Divisions of Nervous System
It can be divided anatomically into the central nervous system (CNS) and the peripheral nervous system (PNS).
-The Central Nervous System
+Consists brain which enclosed by the skull, composed primarily of nervous tissue.
+Consists spinal cord which enables brain to communicate with most parts of the body below head and neck.
-The Peripheral Nervous System
Made up of nerves that consists of long neuron "arma" called axons. Nerves can be classfied according to their origin or destination:
*Cranial Nerves: Originating from or travelling to the brain.
*Spinal Nerves: Originating from or travelling to the spinal cord.
Functional Divisions of the Nervous System
All the functions belong to one of these three types:
-Sensory functions gather information about the internal and external environments of the body.
-Integrative functions analyze incoming information and determine response.
-Motor functions are the actions performed in response to integration.
An Example:
Comments