Pathophysiology and Prevention of CVA

Motor Speech Disorders - Week 9

Overview

  • Focus on prevention and differential diagnosis in motor speech disorders, particularly related to cerebrovascular accidents (CVA).

Cerebrovascular Accident (CVA)

  • Commonly known as stroke; can be ischemic (60-90%) or hemorrhagic (10-40%).

    • Ischemic: Caused by occlusion (thrombosis, embolism).

    • Hemorrhagic: Caused by arterial hemorrhage or aneurysm.

Epidemiology of Stroke

  • Leading cause of motor speech disorders.

  • 610,000 new strokes/year in the U.S. (2023).

  • Prevalence: ~7 million in the U.S. (2019).

  • Major risk factors include hypertension, hyperlipidemia, smoking, obesity, and diabetes.

Stroke Prevention - Modifiable Risk Factors

  • High cholesterol, insulin issues, hypertension, obesity, smoking, heart disease, and diet.

  • Recommendations include behavioral changes and pharmacotherapy for at-risk individuals.

Dietary Contributions to Stroke Risk

  • Emphasis on diets that reduce risk factors: Mediterranean or DASH-style diets are recommended.

  • Key foods: fruits, vegetables, whole grains, nuts, and unsaturated fats; limit processed foods and sugars.

Differential Diagnosis - Overview

  • Definition emphasizes iterative processes for clinical diagnosis.

Clinical Reasoning in Differential Diagnosis

  • Requires critical thinking and synthesizing case history, professional reports, and patient feedback.

  • Uses deductive, inductive, and abductive reasoning to reach and communicate diagnoses effectively.

Types of Dysarthria and Distinguishing Features

  • Dysarthrias can be identified based on lesion localization (e.g., flaccid, spastic, ataxic).

  • Oral Mechanism Examination can help identify characteristic signs for each type.

Key Points

  • The underlying neuroanatomy and neurophysiology aid in understanding symptoms rather than solely memorizing them.

  • Effective communication with patients and other healthcare providers is crucial for treatment success.