Just above the tubercles, the posterior aspect of the medulla is occupied by a triangular fossa, which forms the lower part of the floor of the fourth ventricle.
2.
The perforators of the PAA were identified lying in a vertical line 1 cm posterior to the tragus, supplying the concha, inferior crus, triangular fossa, antihelix and the earlobe . " The study confirmed the constant presence of the helical rim arcade ( Zilinsky-Cotofana ), consistent perforating branches of the PAA, and the helical arcade ( Erdman ).
3.
The study, " Ear Molding in Newborn Infants with Auricular Deformities " ( 2010 ), reported the efficacy of the EarWell device in correcting deformities of the antihelix, the triangular fossa, the helical rim, and an over-prominent conchal-mastoid angle, in 831 ear deformities, in 488 newborn infants who featured : ( i ) prominent ear, ( cup ear ) : 373 ears ( 45 % ); ( ii ) lop ear : 224 ears ( 27 % ); mixed-type ear deformities : 83 ears ( 10 % ) all with associated conchal crus; Stahl s ear : 66 ears ( 8.0 % ); helical rim deformity : 58 ears ( 7.0 % ); conchal crus : 25 ears ( 3.0 % ); and cryptotia : 2 ears ( 0.2 % ).
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