Broca aphasia (expressive aphasia):

Broca aphasia mainly affects the ability to produce speech. Aphasia patients often speak very slowly, seem to take a long time to order their thoughts, or seem unable to find the right words. Any communication takes place in “telegraphic speech”: Affected patients speak in sentences containing only one or two words, often with grammatical errors. Also articulation of words (dysarthria) reading and writing are affected.

Speech comprehension is often not or only partially affected.

Many of those who are affected are impatient with the inability to express themselves or with the long-time communication needs. This can reduce verbal communication even more.

Wernicke aphasia (sensory aphasia):

Patients with Wernicke aphasia often talk a lot and use words incorrectly. They do not realize that their speech lacks coherence and meaning.

Patients also struggle to understand others, to read, and to write. Sometimes, this means verbal communication is impossible. Non-verbal communication is possible to a certain extent.

Affected patients often respond to their surroundings with severe incomprehension. They cannot understand why the person they are talking to cannot understand them.

Amnesic aphasia:

Amnesic aphasia mainly affects the ability to find the rights words. Speech comprehension, reading, and writing are usually only moderately affected. Communication with the patient is reasonably easy.

Global aphasia:

Severe strokes affecting the middle cerebral artery (Arteria Cerebri Media) can cause both expressive and sensory aphasia, resulting in a complete loss of both the ability to speak and to understand speech. Affected patients use many automatisms, repeat phrases over and over, or speak little to not at all. Reading, writing, and body language are also affected.

This makes communicating with stroke survivors affected by global aphasia extremely difficult and requires patience and empathy from those involved.

Speech disorders often occur in connection with a stroke. If there is no obvious cause for a speech disorder, it is necessary to exclude other possible reasons (deafness, etc.).

• Spontaneous speech: How many words are used? How fluent is the speech? Does the patient hesitate?
• Repetition: Is the patient able to repeat complex grammatical structures?
• Comprehension: Does the patient identify the named objects? Are they able to follow simple or complex instructions? Is the patient able to answer simple or complex yes-or-no questions?
• Naming objects: Patients often paraphrase (using phrases such as “the thing you use to tell the time” instead of “clock”).
• Reading and writing: The abilities to understand written words, to spell correctly, and to write from dictation are assessed.

Standardized aphasia tests are carried out to diagnose aphasia.

The prognosis depends on the degree of cerebral damage and on the severity of the disorder. Other important factors are general health, co-existing symptoms, and motivation.

It is possible that aphasic symptoms disappear by themselves within the first six months of a stroke. Speech therapy supports the reduction of speech disorders and improves the expression and comprehension of speech.

The sooner the patient starts therapy and the more regular the sessions, the better the prognosis. Goal of the therapy is to reactivate verbal communication.

Aphasia, such as triggered by a stroke, does not primarily affect mental abilities. It is a speech disorder, not a mental disability. The difference is key when interacting with patients affected by communication problems.

Author: Saskia Wibner

Quellen: 

Lutz, L. (2011). Das Schweigen verstehen, Über Aphasie. Springer-Verlag Berlin Heidelberg 

Efficacy of Intensive Aphasia Therapy in Patients with Chronic Stroke: A Randomised Controlled Trial, 2018

Aphasia Recovery: When, How and Who to Treat?, 2018

Screening tests for aphasia in patients with stroke: a systematic review, 2017