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Trigeminal Nerve (Mandibular Branch). Ahmad Fais (1090312) Aimi Amalina (1091312). Anatomy of Mandibular Division of Trigeminal Nerve. Mandibular Division of Trigeminal Nerve. Anterior Division of Mandibular Nerve. Anterior Division of Mandibular Nerve.
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Trigeminal Nerve (Mandibular Branch) Ahmad Fais (1090312) AimiAmalina (1091312)
Clinical Examination • Test the sensory branches by lightly touching the face with a piece of cotton wool followed by a blunt pin (pain) along the jawline • Test the motor supply: • Ask the patient to clench their teeth together, observing and feeling the bulk of the masseter and temporalis muscles. • Ask the patient to then open their mouth against resistance. • Perform the jaw jerk on the patient by placing left index finger on their chin and striking it with a tendon hammer. This should cause slight protrusion of the jaw
Abnormalities Associated with Mandibular Nerve • Lesions: • Brain lesions, Facial bone fractures/Trauma • Abnormal findings: • Facial hypoasthesia or paraesthesia • Upon mouth opening: • Mandible deviates toward the paralyzed side when there is unilateral paralysis of the masticatory muscles • mandible droops and no jaw movement is possible with bilateral paralysis • Abnormal reflexes • Absent corneal reflex • Jaw jerk: • Associated with upper motor neuron lesions : hyperactive or repeating reflex (clonus) • Associated with nuclear or infranuclear lesions, the reflex is absent • Weakness and wasting of masticatory muscles