The posterior pharyngeal raphe is the midline tendinous band where the bilateral inferior pharyngeal constrictor muscles meet at the posterior midline, extending from the pharyngeal tubercle to the cricopharyngeus. It provides the posterior attachment for the pharyngeal constrictor pair.
The inferior constrictor raphe is the midline landmark in posterior pharyngeal approaches and in Zenker's diverticulum repair where the cricopharyngeus muscle is divided. The raphe is incised in laser cricopharyngeal myotomy. Weakening of this raphe may contribute to Killian's triangle (the weak point above the cricopharyngeus where Zenker's diverticulum herniates).
Pulsion diverticulum herniating through Killian's triangle — the weak point between the inferior constrictor and cricopharyngeus adjacent to the pharyngeal raphe — producing dysphagia and regurgitation, treated by cricopharyngeal myotomy.
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