Masseter

Motor — feel for masseter wasting; ask patient to clench teeth (masseters) and open mouth against resistance on the chin (pterygoids)

What our notes say

• Motor — feel for masseter wasting; ask patient to clench teeth (masseters) and open mouth against resistance on the chin (pterygoids) (CNS History Taking & Neurological Exam Guide | Clinical Skills)
• Jaw deviation toward the lesion side with temporal/masseter hollowing = muscle atrophy/motor weakness (V3 motor lesion) (CNS History Taking & Neurological Exam Guide | Clinical Skills)
• Motor: clench teeth (masseters), open against resistance (pterygoids); jaw deviates toward weak side (CNS & Abdominal Exam: Clinical Techniques, History & Neurology)

Study material on Masseter

• CNS History Taking & Neurological Exam Guide | Clinical Skills

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