NEET PG DENTAL EXAM

Detailed explanation-1: -The ninth cranial nerve curves around the posterolateral border of the stylopharyngeus muscle to pass between the superior and middle constrictor muscles and reach the tongue.

Detailed explanation-2: -Pharyngeal Gaps Between the Superior and Middle Constrictors is the second gap. The structures passing through this gap include Stylopharyngeus, the Glossopharyngeal nerve (CN IX), and the Stylohyoid ligament. Between the Middle and Inferior Constrictors is the third gap.

Detailed explanation-3: -In the pharynx, the sinus of Morgagni is the enclosed space between the upper border of the superior pharyngeal constrictor muscle, the base of the skull and the pharyngeal aponeurosis.

Detailed explanation-4: -The superior pharyngeal constrictor muscle at the buccopharyngeal part (which originates from the fourth and sixth branchial arches) comes in contact with the buccinator muscle (which originates from the second branchial arch), which displays a different embryological origin.