Health
Fact-checked

At WiseGEEK, we're committed to delivering accurate, trustworthy information. Our expert-authored content is rigorously fact-checked and sourced from credible authorities. Discover how we uphold the highest standards in providing you with reliable knowledge.

Learn more...

What is Semantic Dementia?

Mary McMahon
Mary McMahon
Mary McMahon
Mary McMahon

Semantic dementia is a form of neurological disorder characterized by damage to the semantic memory. This causes the patient to forget the meanings of words and to lose memories relating to abstract concepts. For example, a person with semantic dementia might look at and recognize a dog, but be unable to come up with the word “dog,” and would not recognize the word “dog” if it was presented.

This condition is a form of frontotemporal lobal degeneration, formerly known as Pick's disease. Several different conditions are lumped under this umbrella heading. All of them involve atrophy of the frontal lobe of the brain, leading to progressive dementia. Neurodegenerative diseases like semantic dementia can onset slowly and may progress at varying rates as a patient becomes increasingly incapacitated. As the condition progresses, the patient can develop problems like lack of motor coordination and behavioral outbursts.

The symptoms of semantic dementia tends to appear during old age.
The symptoms of semantic dementia tends to appear during old age.

This condition tends to onset in old age. There may be some genetic components, but in other cases, the origins of semantic dementia are not clear. Initially, people may simply fumble for words or use words oddly. As the condition becomes more pronounced, the patient will “talk around” an unknown word, describing something in an attempt to convey meaning without being able to use the desired word. Eventually, more and more words will be lost and it will become increasingly difficult for the patient to communicate.

Although dementia medication cannot stop the condition from worsening, it can be used to slow the progression of the condition.
Although dementia medication cannot stop the condition from worsening, it can be used to slow the progression of the condition.

Patients can become very frustrated by semantic dementia. As with many progressive neurological disorders, the patient is aware of the decline in cognitive function and may become angry and irritated. This can express in the form of emotional outbursts. Patients can also become frustrated as people around them attempt to interpret or finish sentences. As the condition progresses and the patient develops poor motor coordination and other problems, depression and other psychological symptoms can emerge as the patient struggles to adapt.

Individuals with semantic dementia are aware of their surroundings, but often cannot express themselves.
Individuals with semantic dementia are aware of their surroundings, but often cannot express themselves.

There is no cure for semantic dementia. Some medications have been shown to slow the progress of atrophy, helping patients retain cognitive function longer. Treatments like physical therapy can help patients prepare for problems like uncoordinated motor skills, and some patients also find it helpful to develop simplified communication methods so they can communicate with friends, family, and caregivers. It is important for people to remember that individuals with semantic dementia are very much aware of their surroundings and many of their memories are intact, even if they cannot express themselves.

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a WiseGEEK researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Learn more...
Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a WiseGEEK researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Learn more...

Discuss this Article

Post your comments
Login:
Forgot password?
Register:
    • The symptoms of semantic dementia tends to appear during old age.
      By: rainbow33
      The symptoms of semantic dementia tends to appear during old age.
    • Although dementia medication cannot stop the condition from worsening, it can be used to slow the progression of the condition.
      By: Sandor Kacso
      Although dementia medication cannot stop the condition from worsening, it can be used to slow the progression of the condition.
    • Individuals with semantic dementia are aware of their surroundings, but often cannot express themselves.
      By: kolotype
      Individuals with semantic dementia are aware of their surroundings, but often cannot express themselves.
    • There is currently no cure available to patients who are suffering from semantic dementia.
      By: Grafvision
      There is currently no cure available to patients who are suffering from semantic dementia.