The Eustachian tube passes between -
High-Yield Explanation
GAPS BETWEEN PHARYNGEAL MUSCLES AND RELATED STRUCTURES
I. Between the base of the skull and superior constrictor i.e. above superior constrictor (Sinus of Morgagni) :
Levator veli palatini
Auditory tube(eustachian tube)
Ascending palatine artery
II. Between superior and middle constrictors :
Stylopharyngeus muscle
Glossopharyngeal nerve
III. Between Middle and Inferior constrictors :
Internal laryngeal nerve
Superior laryngeal vessels
These structures pierce the thyrohyoid membrane.
IV. Between lower border of inferior constrictor and esophagus :
Recurrent laryngeal nerve
Inferior laryngeal vessels