Muscles, Layers, Nerve Supply, Parts Of Pharynx

Muscles, Layers, Nerve Supply, Parts Of Pharynx

Discuss the origin and insertion of the constrictors of the pharynx.
Answer.

Constrictors of the Pharynx Origin

Superior Constrictor: It arises from the pterygoid hamulus, pterygomandibular raphe, posterior end of mylohyoid line and the side of the tongue.

Middle Constrictor: It arises from the lower part of the stylohyoid ligament, lesser and greater cornua of the hyoid bone.

Inferior Constrictor: It consists of two parts – thyropharyngeus and cricopharyngeus.

• Thyropharyngeus: From the oblique line of thyroid cartilage.
• Cricopharyngeus: From the side of cricoid cartilage.

Pharynx Anatomy

Pharynx  Insertion All the constrictors of the pharynx are inserted into a median raphe, on the posterior wall of the pharynx. The upper end of this raphe is attached to the pharyngeal tubercle on the basilar part of the occipital bone.