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The helix is the prominent rim of the auricle. Where the helix turns downwards posteriorly, a small tubercle is sometimes seen, namely the auricular tubercle of Darwin.
Helix is the folded over outside edge of the ear; Incisura anterior auris, or intertragic incisure, or intertragal notch, is the space between the tragus and antitragus; Lobe (lobule) Scapha, the depression or groove between the helix and the anthelix; Tragus
The antitragus is located just above the earlobe and points anteriorly. It is separated from the tragus by the intertragic notch. The antitragicus muscle, an intrinsic muscle of the ear, arises from the outer part of the antitragus. [1] [2] The antitragus can be much larger in some other species, most notably bats. The antitragus can be pierced ...
The auricle consists of the curving outer rim called the helix, the inner curved rim called the antihelix, and opens into the ear canal. The tragus protrudes and partially obscures the ear canal, as does the facing antitragus. The hollow region in front of the ear canal is called the concha.
Antihelix: The raised ridge of cartilage between the helix and ear canal. Rook: The upper ridge of cartilage of the antihelix; between the tragus and apex of the helix. For most people, a rook piercing through a prominent ridge of cartilage will give the jewelry a vertical appearance as the piercing goes from top to bottom of the surface.
The Helix Nebula (also known as NGC 7293 or Caldwell 63) is a planetary nebula (PN) located in the constellation Aquarius. Discovered by Karl Ludwig Harding, most likely before 1824, this object is one of the closest of all the bright planetary nebulae to Earth. [3] The distance, measured by the Gaia mission, is 655±13 light-years. [4]
The antihelix (anthelix) is a part of the visible ear; the pinna.The antihelix is a curved prominence of cartilage parallel with and in front of the helix on the pinna.. The antihelix divides above into two legs or crura; the crura antihelicis, between which is a triangular depression, the fossa triangularis.
The pitch of a helix is the height of one complete helix turn, measured parallel to the axis of the helix. A double helix consists of two (typically congruent) helices with the same axis, differing by a translation along the axis. [3] A circular helix (i.e. one with constant radius) has constant band curvature and constant torsion. The slope of ...