Stimulus Organism Response

Decent Essays
Nervous System: The human nervous system is a communication that controls all parts of your body (communication within environment) — whether it is voluntary or involuntary.
 S.O.R: Stimulus Organism Response

There are two parts of the nervous system:
 ◦ The central nervous system (CNS), made up of your brain and spinal cord (vertebrate protects spinal cord)
 ◦ The peripheral nervous system (PNS), made up of the nerves that carry messages to and from the CNS and other parts of you body.

The CNS receives information from all over the body, processes that information, and then sends out messages telling the body how to respond.

Nerve Cells:
 The nervous system is made up of trillions of nerve cells, or neurones, even though we don’t use…show more content…
The human brain contains about 100 billion neurones, and has an average volume of 1200-1400mL. Once brain cells die, they stay dead forever.
The brain controls and regulates body functions. Without it you cannot survive. Damage to the brain is repaired slowly. Sometimes other parts of the brain take over the function of the damaged parts, but there are instances where brain damage is permanent.

The Cerebrum:
Associated with higher brain function, such as thought and action. The cerebrum obtains information from an individual’s surroundings and their body, and then sends that information to a specific part of the cerebrum. The cerebrum interprets this knowledge and decides what must happen next. The muscles and sensory information from the left side of the body is controlled by the right side of the brain, and vice versa.

Occupies more than 80% of the brain, and contains over 10 billions neurones. The folds in the cerebrum are called ‘convolutions’, and are used to fit more neurones and information in. These folds increase its surface area by three times. It is here that the high intellectual functions of humans take place. The cerebrum controls you conscious thoughts and the intentional (voluntary)…show more content…
The cerebrum is divided into two hemispheres, each of which are specialised for certain behaviours — called the right and left cerebral hemispheres. When it comes to intended actions such as walking or hitting a ball, the right hemisphere controls the left side of your body, and the left hemisphere controls the right side of the body. The right side of the brain specialises in visual imagery and spatial abilities, whereas the left side of the brain dominates in logical abilities and language.

Cerebellum and Medulla:
In general, the cerebellum is responsible for controlling motor movement and muscle coordination. The cerebellum receives information from the sensory systems, the spinal cord, and other parts of the brain — and regulates motor movements. The cerebellum coordinates voluntary movements including posture, balance and speech, which are factors that provide for smooth movement and activity. In addition, the cerebellum is responsible for motor learning. This means that it is responsible for learning an individual movement or action and facilitates the development of it. 

The brain stem is the stem-like part of the brain that connects to the spinal cord. The medulla has many basic functions, including the regulation of heart rate,
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