While sensation is the process of sensory input arriving at the cerebral cortex, perception is the brain making sense of this input. Perception is an experience that is unique to each individual, whereas the initial input of sensation is usually the same for all people.Know More
Although it is difficult to absolutely define the relationship between sensation and perception, it does have the following characteristics:
Sensation can be input from the outside worldSensations arise when something outside the body stimulates a reaction. For example, if someone walks past a restaurant, its aromas stimulate the olfactory senses. This is a sensation.
Some sensations come from the body itselfIn some cases, sensations arise inside the body. For example, when something disrupts the digestive system's normal functioning, it is likely to send pain sensations to the brain.
Perception is how the brain interprets the sensationOnce the brain receives incoming information, perception begins. Each person may therefore make sense of sensations in different ways. For example, while some people love the smell of bacon cooking, others do not. Therefore, some perceive it as pleasurable, whereas others see it as repugnant. With regards to pain, perceptions can vary in terms of how powerful the person perceives the pain to be. Learn more about Nerves
The inferior alveolar nerve is a bundle of nerve fibers that provides sensation and motor control to the lower jaw. It also provides pain sensation to the lower teeth. For that reason, it is sometimes also called the inferior dental nerve.Full Answer >
Enlarged ventricles in the brain may be a sign of normal pressure hydrocephalus. It happens when one or more ventricals, which are normally hollow areas in the brain, have too much cerebrospinal fluid.Full Answer >
The corneal reflex is an involuntary closing of the eyelids when the cornea is touched by a foreign object. The function of this reflex is to protect the eye from damage. Absence of a corneal reflex may indicate damage to the fifth and seventh cranial nerves, which mediate the reflex.Full Answer >
Three major association areas of the brain include limbic, posterior and the anterior association areas, according to the University of Texas Medical School at Houston. Association areas link sensory input areas of the brain with motor output portions of the central nervous system.Full Answer >