The 8 types of aphasia

Unlocking communication is one of the most vital parts of healing after a neurological event. When a stroke, brain injury, or illness damages the brain’s language centers, it can cause aphasia—a condition that affects how a person speaks, understands, reads, or writes, without impacting their intelligence.

Because language pathways are complex, aphasia presents differently depending on where the brain injury occurred. Clinicians generally group aphasia into two broad categories: non-fluent (difficulty forming words) and fluent (words flow easily, but the meaning is distorted).

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Non-Fluent Aphasias

In non-fluent aphasia, stringing words together requires immense physical and mental effort.

• Broca’s Aphasia: Often called “expressive” aphasia. People know exactly what they want to say, but struggle to produce the words. Speech is halting and short, though language comprehension remains relatively strong.
• Global Aphasia: The most severe form, caused by widespread damage to language areas. It severely limits both speech production and the ability to understand spoken or written language.
• Transcortical Motor Aphasia: Very similar to Broca’s aphasia with halting speech and good comprehension, but with one key difference: the ability to repeat phrases spoken by others is surprisingly intact.
• Mixed Transcortical Aphasia: A rare condition similar to Global Aphasia where both expression and comprehension are severely impaired, yet the person can still repeat words and phrases spoken to them.

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Fluent Aphasias

In fluent aphasia, speech output sounds natural in rhythm and speed, but the content often lacks accuracy or meaning.

• Wernicke’s Aphasia: Often called “receptive” aphasia. Speech flows easily and rapidly, but sentences may contain made-up words or incorrect word choices (“word salad“). Understanding what others are saying is significantly impaired.
• Conduction Aphasia: Speech and comprehension are both fairly good, but the bridge between them is damaged. Repeating words or sentences spoken by someone else is disproportionately difficult.
• Transcortical Sensory Aphasia: Similar to Wernicke’s aphasia, speech flows well but lacks meaning and comprehension is poor. However, the ability to repeat words remains intact, often leading to involuntarily repeating spoken words (echolalia).
• Anomic Aphasia: A milder, persistent form where speech grammar and comprehension are clear, but the person constantly struggles to find specific nouns or names, often talking around the missing word (circumlocution).

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Summary Overview

Aphasia Type	Speech Output	Language Comprehension	Ability to Repeat
Broca’s	Halting / Effortful	Good	Impaired
Global	Very Limited	Severely Impaired	Severely Impaired
Transcortical Motor	Halting / Effortful	Good	Intact
Mixed Transcortical	Very Limited	Severely Impaired	Intact
Wernicke’s	Fluent / Meaningless	Severely Impaired	Impaired
Conduction	Fluent / Clear	Good	Impaired
Transcortical Sensory	Fluent / Meaningless	Severely Impaired	Intact
Anomic	Fluent / Word-finding gaps	Good	Good

Understanding these distinctions helps care teams, speech therapists, and families tailor their support—ensuring every individual gets the right tools to rebuild their communication skills.