"The cartilaginous portion is approximately 24 mm long and consists of a triangular plate of elastic fibrocartilage, the apex of which is attached to the margin of the medial end of the osseous portion of the tube, while its base lies directly under the mucous membrane of the nasopharynx, where it forms an elevation, the torus tubarius or cushion, behind the pharyngeal orifice of the tube. The upper edge of the cartilage is curled upon itself, being bent laterally causing a hook-like appearance on cross-sectional images; a groove or furrow is thus produced, which is open below and laterally, and this part of the canal is completed by a fibrous membrane. The cartilage lies in a groove between the petrous part of the temporal bone and the great wing of the sphenoid bone; this groove ends opposite the centre of the medial pterygoid plate."
"The diameter of the tube is not uniform throughout, being greatest at the pharyngeal orifice, least at the junction of the bony and cartilaginous portions, and again increased toward the tympanic cavity; the narrowest part of the tube is termed the isthmus."
"Eustachian tube dysfunction"
"Eustachian tube cyst"
Expected headings
"Osseous portion"
"Cartilaginous portion"
"Mucous membrane"
"The cartilaginous portion is approximately 24 mm long and consists of a triangular plate of elastic fibrocartilage, the apex of which is attached to the margin of the medial end of the osseous portion of the tube, while its base lies directly under the mucous membrane of the nasopharynx, where it forms an elevation, the torus tubarius or cushion, behind the pharyngeal orifice of the tube. The upper edge of the cartilage is curled upon itself, being bent laterally causing a hook-like appearance on cross-sectional images; a groove or furrow is thus produced, which is open below and laterally, and this part of the canal is completed by a fibrous membrane. The cartilage lies in a groove between the petrous part of the temporal bone and the great wing of the sphenoid bone; this groove ends opposite the centre of the medial pterygoid plate."
"The cartilaginous portion is approximately 24 mm long and consists of a triangular plate of elastic fibrocartilage, the apex of which is attached to the margin of the medial end of the osseous portion of the tube, while its base lies directly under the mucous membrane of the nasopharynx, where it forms an elevation, the torus tubarius or cushion, behind the pharyngeal orifice of the tube. The upper edge of the cartilage is curled upon itself, being bent laterally causing a hook-like appearance on cross-sectional images; a groove or furrow is thus produced, which is open below and laterally, and this part of the canal is completed by a fibrous membrane. The cartilage lies in a groove between the petrous part of the temporal bone and the great wing of the sphenoid bone; this groove ends opposite the centre of the medial pterygoid plate."
"The diameter of the tube is not uniform throughout, being greatest at the pharyngeal orifice, least at the junction of the bony and cartilaginous portions, and again increased toward the tympanic cavity; the narrowest part of the tube is termed the isthmus."
"History and etymology"