Biology Tutorials > Human Neurology > Neurology of Illusions

Neurology of Illusions

Neurology of Illusions

Illusions can be caused by mental disorders or misreading of the sensory data obtained from the external environment.

As mentioned in the previous tutorial, Human Perception, illusions can be caused by mental disorders or misreading of the sensory data obtained from the external environment. For now, we will look at the latter.

Visual Illusions

  • Ambiguities. These types of illusions are perceptual changes, leaving the brain to second guess the actual position of the elusive object.
  • Distortions. Caused by sensory misreadings in regards to spatial awareness, where the illusion can be distorted from its actual location and outline.
  • Paradoxes. Illusions that appear to be logically impossible, and therefore makes the brain unsure if it is real or really an illusion.
  • Fictions. This is caused by the brain ‘assuming’ the presence of hard surfaces when they are maybe not there, therefore, creating the potential of an illusion if the brain’s assumption about the external object is incorrect.

Auditory Illusions

One of the most famous of these is the Doppler Effect, where a noise situated close to you has a higher pitch of sound to that of a sound further away. This is the case if you should and get an echo, your voice will always sound deeper in the echo when it is not. This is effectively an illusion.

The Study of Illusions

As mentioned previously, the study of illusions in sufferers of a mental disorder provides a key to a deeper understanding of what is going on in their minds. This is also the case of a healthy brain, where the study of illusions can work out the parameters at which it compensates for its own lack of ability.

It is worth noting that the trial and error the sensory organs function have, they are as just as foolproof as any other conscious human thought. The chances of your brain not being able to guess the spatial distance of a fuzzy moving object are the same lack in the ability that people have in typing an error-free document

In this sense, illusions are studying the perceptions and sensory data obtained from situations where human error prevents us from seeing the real deal.

Another interesting fact is that the retina is read by the brain every 0.1 seconds, meaning that you are not actually seeing anything in the present, but something that just happened a fraction of a second ago.

 

Credit: Concerning Reality

Quiz

Choose the correct answer. Write it in the space provided.

Ambiguities
Distortions
Paradoxes
Fictions
Auditory Illusions
1. Visual illusions caused by the brain's assuming the presence of hard surfaces when in reality they're not present
2. Visual illusions caused by the sensory misreadings in regards to spatial awareness
3. Visual illusions that makes the brain uncertain if it is real or really an illusion
4. Visual illusions that are perceptual changes, leaving the brain to second guess the actual position of the elusive object.
5. Exemplified by a noise situated close to you has a higher pitch of sound to that of a sound further away

Send Your Results (Optional)

Your Name
To Email
Biology Tutorials > Human Neurology > Neurology of Illusions

You will also like...

Chromosome Mutations
Chromosome Mutations

Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

The Human Physiology
The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

Fossil trilobite imprint in the sediment
Insects

There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

primitive arthropods
Arthropods

The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

Birth of a Human Baby
Birth of a Human Baby

Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

Biological Cell schematic diagram
Biological Cell Introduction

It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..