There are two broad categories of aphasia: fluent and non-fluent. Damage to the temporal lobe (the side portion) of the brain may result in a fluent aphasia called Wernicke's aphasia (see figure). In most people, the damage occurs in the left temporal lobe, although it can result from damage to the right lobe as well.
What is double dissociation in memory?
a research process for demonstrating the action of two separable psychological or biological systems , such as differentiating between types of memory or the function of brain areas. One experimental variable is found to affect one of the systems, whereas a second variable affects the other.
Which two types of aphasia provide evidence of a double dissociation between brain regions involved in syntax vs semantics?
There are two broad categories of aphasia: fluent and non-fluent. Damage to the temporal lobe (the side portion) of the brain may result in a fluent aphasia called Wernicke's aphasia (see figure). In most people, the damage occurs in the left temporal lobe, although it can result from damage to the right lobe as well.
What is the Broca's aphasia?
Broca's dysphasia (also known as Broca's aphasia)
It involves damage to a part of the brain known as Broca's area . Broca's area is responsible for speech production. People with Broca's dysphasia have extreme difficulty forming words and sentences, and may speak with difficulty or not at all.
What is Wernicke aphasia?
Wernicke aphasia is characterized by impaired language comprehension . Despite this impaired comprehension, speech may have a normal rate, rhythm, and grammar. The most common cause of Wernicke's aphasia is an ischemic stroke affecting the posterior temporal lobe of the dominant hemisphere.
What are the 3 types of aphasia?
The three kinds of aphasia are Broca's aphasia, Wernicke's aphasia, and global aphasia . All three interfere with your ability to speak and/or understand language.
What is the most common cause of aphasia?
The most common cause of aphasia is brain damage resulting from a stroke — the blockage or rupture of a blood vessel in the brain. Loss of blood to the brain leads to brain cell death or damage in areas that control language.
What do double Dissociations prove?
Double dissociations relate functional behavior to brain lesions . They are reference points for the causal chains running through mind and brain.
What is Single vs Double dissociation?
Establishing a single dissociation between two functions provides limited and potentially misleading information , whereas a double dissociation can conclusively demonstrate that the two functions are localized in different areas of the brain.
What is double dissociation brain damage?
Double Dissociation is when two related mental processes are shown to function independently of each other. A classic example of Double Dissociation is speech and language comprehension. ... When a part of the brain called the Broca's area is damaged, patients may still understand language but be unable to speak fluently .
Which of the following is an example of Broca's aphasia?
For example, a person with Broca's aphasia may say, “ Walk dog ,” meaning, “I will take the dog for a walk,” or “book book two table,” for “There are two books on the table.” People with Broca's aphasia typically understand the speech of others fairly well.
How long does Broca's aphasia last?
When the cause of Broca's aphasia is a stroke, recovery of language function peaks within two to six months , after which time further progress is limited. However, patients should be encouraged to work on speech production, because cases of improvement have been seen long after a stroke.
How would you treat someone with Broca's aphasia?
Some therapy strategies include listening to a recording of yourself speaking, repeating and rehearsing phrases, and reading out loud . In addition to speech therapy, you will likely also need treatment for the cause of your aphasia, whether it is a stroke, a brain tumor, an infection, or a head injury.
What are the 4 types of aphasia?
- Global Aphasia. Global aphasia is the most severe type of aphasia. ...
- Broca's Aphasia. Broca's aphasia is also called non-fluent or expressive aphasia. ...
- Mixed Non-Fluent Aphasia. ...
- Wernicke's Aphasia. ...
- Anomic Aphasia. ...
- Primary Progressive Aphasia (PPA)
How do you test for Wernicke's aphasia?
Your doctor will need to perform tests to determine what has caused Wernicke's aphasia. This will likely include brain imaging tests such as an MRI or CT scan . These test can also help your doctor determine if other parts of your brain have been affected.
Do people with Wernicke's aphasia understand what they are saying?
People who have Wernicke's aphasia can't understand words . They speak with regular rhythm and grammar. But the words don't make sense. They don't realize that what they're saying is nonsense.
