Final answer:
Expressive aphasia is a loss of ability to produce language due to damage to Broca's area, resulting in non-fluent, broken speech and possible loss of grammar.
Step-by-step explanation:
Expressive aphasia occurs when there is a loss of the ability to produce language, typically associated with damage to Broca's area in the frontal lobe of the brain. This type of aphasia is characterized by non-fluent speech where an individual may be able to say some words but the speech is often broken or interrupted, and grammar may also appear to be lost. In contrast to receptive aphasia, which affects the understanding of received language, expressive aphasia impairs the ability to formulate language expressions.
It is important to distinguish expressive aphasia from other forms such as conduction aphasia, which is a loss of language function related to connecting the understanding of speech with the production of speech without loss of either specific function, and receptive aphasia, where comprehension is impacted. Moreover, patients with expressive aphasia may understand spoken and written language but struggle to produce coherent speech themselves.