[...] Broca's aphasics, i.e. for non-fluent patients with anterior focal lesions involving Broca's area. In fact, agrammatism is often viewed as a criterial symptom for a diagnosis of Broca's aphasia [...].
- Bates & Friederici & Wulfeck (2004), Pag. 264

Broca's aphasia is defined by non-fluent and dyprosodic speech, with reduced utterance lenght and sentence complexity, together with more omission of function words and/or grammatical inflections than we would expect in a normal speaker of that language. Patients should demonstrate relatively normal comprehension, at the level of clinical interviews and reports from the family about the patient's functioning in everyday life.
- Bates & Friederici & Wulfeck (2004), Pag. 269

This facts led earlier investigators (including Pick) to view Broca's aphasia as a motor deficit, i.e. "motor aphasia" [...].
- Bates & Friederici & Wulfeck (2004), Pag. 267