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23 lut 2017 · The position of the ear is advantageous for assessing vital status and detecting diseases through reliable and comfortable sensing devices.
Figure 2: External ear. a) Pinna or Auricle b) External Auditory Canal c) Tympanic membrane Pinna : (Figure 3 & 3.1) Single piece of yellow Elastic cartilage except at: The ear lobule and incisura terminalis: depression between the tragus and the anterior crus of helix. Cartilage is avascular structure - >
Internal (inner) ear consists of: bony labyrinth (vestibule, cochlea, semicircular canals) internal auditory canal membranous labyrinth (utricule, saccule, cochlear duct, semicircular ducts)
The first part of the external ear is the pinna or auricle. This is formed of irregular-shaped cartilage covered by firmly adherent skin. The dependent lobule is mainly fat. Anteriorly the cartilage forms the tragus, which covers the entrance of the external auditory meatus. The main anatomical features of the pinna are shown in Figure 2.2.
16 sie 2020 · This article will focus on the anatomy of the external ear – its structure, neurovascular supply and clinical correlations. The external ear can be divided functionally and structurally into two parts; the auricle (or pinna), and the external acoustic meatus – which ends at the tympanic membrane.
The sound vibrations picked up by the pinna travel down the ear canal to the ear drum causing the ear drum to vibrate. The ear canal makes yellow or brown coloured wax. Wax is made by the ear canal to clean the ear of dirt and normally is expelled from the canal by the ear itself.
The ear starts to develop as early as in the sixth week of pregnancy. During foetal development, the pinna (the visible part of the ear) forms from little bumps (hillocks) on the side of the head, which grow and fuse. Sometimes the pinna fails to develop fully – known as microtia – and in some babies the ear canal may also be absent.
