ADL_Chapter_6_Fluent_Aphasia_

Fluent Aphasia Overview

  • Definition: A type of aphasia characterized by abundant speech output.

  • Verbal Output: Typically ranges from 100-200 words per minute (wpm).

  • Communication Effectiveness: Despite fluency, patients communicate less effectively than those with nonfluent aphasia.

  • Speech Characteristics: Often includes omissions of meaningful words, filled with paraphasias making speech less coherent.

Types of Fluent Aphasia

  • Wernicke's Aphasia

  • Transcortical Sensory Aphasia

  • Conduction Aphasia

  • Anomic Aphasia

Wernicke's Aphasia

  • Characteristics:

    • Fluent speech with good articulation, intonation, and prosody.

    • Speech often meaningless; comprehension is significantly impaired.

    • Patients show poor insight into their condition and do not realize that their speech lacks sense.

  • Lesion Location: Posterior portion of the left hemisphere's first temporal gyrus.

  • Patient Awareness: Patients may be unaware of their disabilities and often experience little frustration.

Language Characteristics

  • Fluent yet jargony speech coupled with poor auditory comprehension.

  • High rate of speech, normal prosodic features, and good articulation.

  • Speech is filled with semantic and literal paraphasias, neologisms, and extraneous syllables.

  • Example output: “Well for the umpig and its leedwa in the geebug” when asked, “How are you?”

  • Additional Impairments: Repetition, reading comprehension, and writing are significantly impaired.

Important Considerations

  • Patients may be misdiagnosed as psychiatric conditions such as schizophrenia due to confused speech and lack of insight.

  • Symptoms can resemble paranoia and depression but are linked to neurological impairments.

Transcortical Sensory Aphasia

  • Cause: Damage to the watershed areas of the middle cerebral artery.

  • Characteristics: Patients are able to repeat and read (Wernicke’s shadow), often confused with Wernicke's Aphasia, exhibit hemiparesis, and unilateral neglect.

Language Characteristics

  • Generally fluent speech with good syntactic skills.

  • Features paraphasias and empty speech with impaired naming; however, repetition skills are good.

  • Patients may show echolalic behavior and preserved oral reading despite poor auditory comprehension.

Conduction Aphasia

  • Lesion Location: Involves damage to the arcuate fasciculus, deep supramarginal gyrus, or superior temporal gyrus.

  • General Characteristics: Right-sided paresis, oral and limb apraxia, and possible sensory impairments including hearing and sight loss.

Language Characteristics

  • Moderately fluent speech, significant phonemic paraphasias, and challenges with imitation and word finding.

  • Recognition of errors is present, but correcting them may not be any more successful than in Broca’s aphasia.

  • Good comprehension but impaired repetition alongside naming and writing issues.

Anomic Aphasia

  • Characteristics: Severe difficulties in word-finding but grammatically fluent speech; comprehension remains intact.

  • Lesion Location: Angular gyrus region.

  • Overriding Feature: Persistent naming problems alongside intact language skills.

Summary Chart of Fluent and Nonfluent Aphasia

  • Wernicke's Aphasia: Fluent, poor comprehension; impaired repetition.

  • Conduction Aphasia: Fluent, relatively good comprehension; impaired repetition.

  • Transcortical Sensory Aphasia: Fluent, poor comprehension; good repetition.

  • Anomic Aphasia: Fluent, good comprehension; impaired naming and repetition.

Mnemonics for Aphasia Types

  • Transcortical Aphasia:

    • Broca’s- Transcortical MOTOR (BMWS: Broca’s Motor/Wernicke’s Sensory).

  • Conduction Aphasia: "CRAPP" - Comprehension good, Repetition impaired, Aware of deficits, Paraphasic, Parietal lesion.

Aphasia Case Examples

  • Wernicke's Aphasia: Patient displays fluent speech yet is unable to communicate effectively due to the nature of their output, leading to frustration and confusion.

  • Broca's Aphasia: Difficulty expressing thoughts while retaining comprehension; may exhibit emotional distress due to communicative challenges.