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Crus of the helix is just above the tragus; Cymba conchae is the narrowest end of the concha; External auditory meatus is the ear canal; Fossa triangularis is the depression in the fork of the antihelix; Helix is the folded over outside edge of the ear
The helicis major is a narrow vertical band situated upon the anterior margin of the helix. It arises below, from the spina helicis, and is inserted into the anterior border of the helix, just where it is about to curve backward. The helicis minor is an oblique fasciculus, covering the crus helicis.
The Helicis minor (musculus helicis minor or smaller muscle of helix) is a small skeletal muscle. The helicis minor is an intrinsic muscle of the outer ear . The muscle runs obliques and covers the helical crus , part of the helix located just above the tragus .
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.
Helices are important in biology, as the DNA molecule is formed as two intertwined helices, and many proteins have helical substructures, known as alpha helices. The word helix comes from the Greek word ἕλιξ, "twisted, curved". [1] A "filled-in" helix – for example, a "spiral" (helical) ramp – is a surface called a helicoid. [2]
The two crura flank the bulb – one to each side of the bulb. Each crus is attached at the angle between the perineal membrane and ischiopubic ramus. The deep artery of the penis enters the anterior portion of the crus. Distally, each crus transitions into either corpus spongiosum of the body of the penis. [1]
The cerebral crus (crus cerebri. crus means ‘leg’ in Latin.) is the anterior portion of the cerebral peduncle which contains the motor tracts , traveling from the cerebral cortex to the pons and spine .
Crus can refer to: Crus, a subgenus of the fly genus Metopochetus; Crus (lower leg) Crus, a plural of Cru (wine) CRUs, an abbreviation of Civil Resettlement Units; Rektorenkonferenz der Schweizer Universitäten (CRUS; English: Rectors' Conference of the Swiss Universities) Crus (pl.: crura) can also refer to other anatomical structures that are ...