Agnosia : Definition, Causes, Types, and Treatment


Agnosia is a relatively unusual condition in which you lose your capacity to recognise items or individuals. Agnosia is frequently caused by impairment to certain brain locations. Because it usually only impacts one information pathway, you may still be able to think normally in other areas.

What Are the Causes of Agnosia?

Agnosia can be brought on by anything that damages or degenerates your brain. If the region of your brain that connects your memories to your senses and perception is damaged, you may develop agnosia. These areas can be found in the brain’s parietal, temporal, or occipital lobes.

Agnosia can also be caused by other disorders that damage or impair the brain. These are some of the conditions:

  • Stroke
  • Tumor
  • Infection
  • Dementia
  • Hypoxia
  • Toxins
  • Injuries to the head
  • Disorders of development

Agnosia comes in a variety of forms.

Agnosia can manifest in a variety of ways depending on the location of the damage. It could affect any of your senses. However, in most cases, just one person is engaged. Some types of agnosia result in very distinct and intricate symptoms that only affect one sense.

Auditory agnosia

  • Auditory agnosia is a condition in which a person is unable to hear.
  • This has an effect on your hearing. If you have this sort of agnosia, you might not recognise a sound like a telephone ringing. You can, however, hear it.

Olfactory agnosia

  • Olfactory agnosia is a condition in which a person is unable to detect odours.
  • This has an impact on your perception of smell. You can still detect odours. You simply can’t place what you’re smelling.

Visual agnosia

  • Visual agnosia is a condition in which a person is unable to see what is
  • With this sort of agnosia, you can perceive familiar objects like a spoon but have no idea what they are. When you touch them, you know who they are.

Agnosia of the oesophagus.

  • This has an impact on your sense of taste. When you taste anything, you don’t recognise it.

Somatosensory agnosia

  • Somatosensory agnosia is a type of agnosia that affects the sense of touch.
  • This is a type of agnosia that inhibits your ability to feel touch. You can’t recognise a familiar object, such as a key, without looking at it. It’s easy to detect when you look at it.


  • Face blindness is another name for this condition. You may have problems recognising familiar faces if you have prosopagnosia. Symptoms of prosopagnosia can also be more severe. They may make it difficult for you to distinguish between familiar and new faces. In severe circumstances, you may not be able to distinguish a face from an object or recognise your own face.

Environmental agnosia

  • Environmental agnosia is a condition in which a person is unaware of their surroundings.
  • This is the inability to recognise areas that are known to you, such as your house or neighbourhood.


  • Color blindness can be partial or full.


  • At any given time, you cannot see more than one thing or part of an object. You might only see the spoon if you look at a table with a plate, glass, and spoon on it. You could notice the glass but not the spoon if someone points it out.

How Do You Know If You Have Agnosia?

Your doctor will examine you and listen to your symptoms. They might put you through some tests to check if you can recognise objects with your senses. Brain imaging examinations such as computed tomography (CT) scans or magnetic resonance imaging may be required (MRI).

What Is Agnosia and How Is It Treated?

Agnosia does not have a specific treatment. If possible, the underlying cause will be addressed. You can learn to adjust for your agnosia through speech and occupational therapy. They may also be able to assist you in improving your communication skills, task planning, issue solving, and interpersonal interactions.

Agnosia: Key Points to Remember

Agnosia is a neurological condition in which people have trouble recognising or perceiving visual, aural, or tactile stimuli. It’s brought on by injury to the parts of the brain that process sensory information.

Individuals can learn to rely on their other senses to compensate for inadequacies and improve their quality of life if only one of their senses is impaired. Individuals can also engage in specific exercises and activities to create neuroadaptive changes in the brain and increase sensory processing abilities.

Agnosia’s prognosis

The prognosis for agnosia is determined by a number of factors, including :

  • Where does the damage to your brain occur?
  • What is the extent of the damage?
  • What is the severity of your symptoms?
  • How effective is the underlying cause’s treatment?
  • What is your age?

If whatever is causing the damage can be adequately addressed, you can begin to improve within the first three months. You can keep improving for up to a year.

0 200

You might also like

No Comments

Leave a Reply

Solve : *
35 ⁄ 7 =