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Blockage, whether caused by salivary duct stones or external compression, may cause pain and swelling of the parotid gland . Koplik's spots which are pathognomonic of measles are found near the opening of the parotid duct. The parotid duct may be cannulated by inserting a tube through the internal orifice in the mouth. [2]
Sometimes accessory parotid glands are found as an anatomic variation. These are close to the main glands and consist of ectopic salivary gland tissue. [2] Capsule of parotid gland. A capsule of the parotid gland is formed from the investing layer of the deep cervical fascia. It is supplied by the great auricular nerve.
The parotid fascia is described as consisting of an outer leaf and an inner leaf that are formed by a split of the deep cervical fascia: the outer leaf represents parotideomasseteric fascia and extends superiorly to the zygomatic arch; the parotid fascia is said to be considered the parotid capsule where it covers the gland while anteriorly to ...
The parotid fascia (or parotid capsule [1]) is a tough [2] fascia enclosing the parotid gland. [1] [2] [3] It has a superficial layer and a deep layer. [1] Current scientific knowledge regards the superficial layer to be continuous with the fascia of the platysma, and the deep layer to be derived from the deep cervical fascia. [1]
The tympanic nerve (Jacobson's nerve) is a branch of the glossopharyngeal nerve passing through the petrous part of the temporal bone to reach the middle ear.It provides sensory innervation for the middle ear, the Eustachian tube, the parotid gland, and mastoid cells.
Striated duct in parotid gland A striated duct ( Pflüger's ducts ) is a gland duct which connects an intercalated duct to an interlobular duct. It is characterized by the basal infoldings of its plasma membrane, characteristic of ion-pumping activity by the numerous mitochondria.
The SML is pierced by the mylohyoid nerve (a branch of the inferior alveolvar nerve) and the accompanying mylohyoid artery and vein. [3] Any remaining space between the SML and mandible is taken up by the parotid gland. [3] Between the SML and the pharynx are situated adipose tissue, and a pharyngeal vein. [1]
In insects, polytene chromosomes are commonly found in the salivary glands; they are also referred to as "salivary gland chromosomes". The large size of the chromosome is due to the presence of many longitudinal strands called chromonemata; hence the name polytene (many stranded). They are about 0.5 mm in length and 20 μm in diameter.