Trismus in parapharyngeal abscess is due to spasm of:: (A) Masseter muscle, (B) Medial pterygoid, (C) Lateral pterygoid, (D) Temporalis
Answer is B. Styloid process divides the pharynx into anterior and posterior compament. Trismus occurs in infection of anterior compament whereas toicollis (due to spasm of paraveebral muscles) occurs in the infection of posterior compament.