Biology Tutorials > Human Neurology > Human Perception – Neurology

Human Perception – Neurology

Human perception in action

Human perception in action

A better understanding of human perception unlocks the key to how the mind works, an advantage when working with people with mental disorders.

Visual Perception

The below diagram is an illustration as to how we all perceive things in our own way, as suggested by the theories of Jung and Freud.

perception-min

Human Perception in Action

What do you see? Some of you may see 2 green faces, others may see a white chalice. This all depends on your initial perception of the diagram. You may find that when you look again, you may see the alternate picture within the diagram.

The retina is responsible for interpreting visual stimuli such as this, where it picks up photons of light via the 130 000 000 rods and cones situated on it. In pre-modern times it was considered that visual perception simply encompassed what was seen by the eye on the outside. This external stimuli would, in turn, produce a perception in the brain caused by the stimulus.

However, this is not the case. Modern medicine now knows that information from the eye is simply a physiological process that does not actually process the signals it receives. This job is left to the brain.

The senses simply act as a messenger to a particular stimulus that is seen, the brain is the place where external stimuli are actually perceived.

Spatial Awareness

The environment we live in is 3 dimensional, thus needs a 3-dimensional approach to understand it. Therefore height, width and depth must be measured by the eyes.

This is possible by the way the eyes are situated on the head. Positioned either side of the nose, the right eye picks up vision on the left hemisphere and the left eye picks up vision in the right hemisphere.

The images picked up by the eyes are projected upside down on each of the eyes’ retina. This, in turn, will be perceived the right way up by the brain, which will interpret the three-dimensional values of the external environment at a very fast and effective rate

Illusions

It is possible for the physiological state of the brain to deviate from the norm and trigger of a mental disorder. Illusions are a symptom of such mental disorders.

However, it is also possible to trick the senses of a perfectly functional healthy brain. Illusions, such as the mirages that appear in the desert are caused by trickery of the sense, leading us to believe there is something out there when this is not the case.

More information on illusions and mind trickery are looked upon in the next tutorial, Neurology of Illusions.

Biology Tutorials > Human Neurology > Human Perception – Neurology

You will also like...

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Peppered moth ("Biston betularia") melanic and light form
Theory of Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

Freshwater lake ecosystem
Freshwater Producers and Consumers

Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..

Circulation
Circulation

The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

"Cronopio dentiacutus", a prehistoric mammal (an illustration)
Mammalian Ancestors

Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

Physical growth
Physical Development in Humans

This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..