Quiz #1 Flashcards
Helix
The outermost ridge of external ear
The “?” shape (not including lobe)

Helix Root
Center of ear to face
LM0 to LM1

Superior Helix
The most superior section of Helix
LM1 to LM4

Helix Tail
The vertical aspect of Helix which goes toward lobe
LM4 to LM6

Antihelix
“Y” shaped raised structure running vertically through center of ear

Superior Crus of AH
Upper “arm” of AH
Stretches vertically

Inferior Crus of AH
Lower “arm” of AH
Stretches horizontally

Body of AH
Center third of AH
Level of LM16 to LM15

Tail of AH
Lower third of AH
LM15 to LM14

Tragus
Verticle “flap” which covers the opening to ear canal

Antitragus
L-shaped horizontal “flap” inferior to tail of Antihelix

Intertragic Notch
Curved “U” separating Tragus from Antitragus

Lobe
“U” shaped soft tissue at base of external ear
Scaphoid Fossa
Groove between the Helix and Antihelix
Triangular Fossa (Navicular Fossa)
Triangular “bowl” between Inferior crus and Superior crus of Antihelix

Concha
Shell-shaped valley in center of ear

Superior Concha (Cymba)
Upper “bowl”, above Concha Ridge

Inferior Concha (Cavum)
Lower “bowl”, below concha ridge

Concha Ridge
Raised verticle ridge in center of ear
LM0 toward Antihelix
Concha Wall
The surface leading from the Concha Ridge up to the spine of Antihelix tail
Subtragus (underside)
Underside of tragus
Internal Helix (hidden areas)
Hidden underside of Superior Helix
Darwinian Tubercle (DT)
A protrusion that seperates the Superior Helix from the Helix Tail, generally parallel to tip of Triangular Fossa
Posterior Lobe
Underside of lobe









