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The auricle or auricula is the visible part of the ear that is outside the head. It is also called the pinna ( Latin for ' wing ' or ' fin ', pl. : pinnae ), a term that is used more in zoology . Structure
The extrinsic auricular muscles are the three muscles surrounding the auricula or outer ear: anterior auricular muscle; superior auricular muscle; posterior auricular muscle; The superior muscle is the largest of the three, followed by the posterior and the anterior. In some mammals these muscles can adjust the direction of the pinna.
The outer ear is the external portion of the ear and includes the fleshy visible auricle, the ear canal, and the outer layer of the eardrum (also called the tympanic membrane). [2] [3] The auricle consists of the curving outer rim called the helix, the inner curved rim called the antihelix, and opens into the ear canal.
Auricle, auricula or auricula may refer to: Auricle (anatomy), the external portion of the ear; Auricle, former name of the atrium of the heart; still used to describe this chamber in some other animals; Auricle (botany), an ear-like projection on the base of a leaf or petal; Auricles, ear-like projections at the base of the head of a planarium
The helix is the prominent rim of the auricle. ... External ear. Right auricle. Lateral view. External ear. Right auricle. Lateral view. External ear. Right auricle.
Pinna (anatomy), or auricle, the outer part of the ear; Pinna, a genus of molluscs; Pinna (botany), a primary segment of a compound leaf; People. Surname ...
The folds of cartilage surrounding the ear canal are called the auricle. Sound waves are reflected and attenuated when they hit the auricle, and these changes provide additional information that will help the brain determine the sound direction. The sound waves enter the auditory canal, a deceptively simple tube.
The several components or degrees of development range from an ear tag, preauricular appendage, preauricular tag, or accessory tragus, to supernumerary ears or polyotia. [7] It is a relatively common congenital anomaly of the first branchial arch or second branchial arches.