Salivary glands 0
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Transcript of Salivary glands 0
Anatomy of
Salivary Glands
Parotid Gland -It is the largest salivary gland
-Secretes serous fluids
Site
Angle of Mandible
Sternomastoid
Auricle
RelationsRelations
Relations
Upper Part
1.Superficial Temporal vessels.Auriculotemporal nerve.
2.Cartilaginous part of External Auditory Meatus.
3.Temporal branch of Facial n.
1.Superficial Temporal vessels.Auriculotemporal nerve.
2.Cartilaginous part of External Auditory Meatus.
3.Temporal branch of Facial n.
Relations
Lower Part
1.Cervical branch of Facial n.
2.Retromandibular vein.
3.Posterior belly of digastric.
4.External Carotid artery.
1.Cervical branch of Facial n.
2.Retromandibular vein.
3.Posterior belly of digastric.
4.External Carotid artery.
Relations
• Zygomatic branch of Facial n.
• Transverse Facial artery.
• Buccal branch of Facial n.
• Accessory Parotid gland.
• Parotid duct.
• Mandibular branch of Facial n.
• Zygomatic branch of Facial n.
• Transverse Facial artery.
• Buccal branch of Facial n.
• Accessory Parotid gland.
• Parotid duct.
• Mandibular branch of Facial n.
Anterior Border
Relations
Lateral Surface
1.Great Auricular nerve.
2.Parotid lymph nodes.
3.Skin and Fascia
1.Great Auricular nerve.
2.Parotid lymph nodes.
3.Skin and Fascia
Relations
Antero-Medial Surface
1.Ramus of the mandible.
2.Masseter muscle.
3.Medial pterygoid muscle
1.Ramus of the mandible.
2.Masseter muscle.
3.Medial pterygoid muscle
Relations
Postero-Medial Surface1.Mastoid process
2.Sternomastoid muscle
3.Posterior belly of Digastric
4.Styloid process and the muscle & ligaments attached to it.
5. Internal carotid artery & Internal jugular vein (carotid sheath).
1.Mastoid process
2.Sternomastoid muscle
3.Posterior belly of Digastric
4.Styloid process and the muscle & ligaments attached to it.
5. Internal carotid artery & Internal jugular vein (carotid sheath).
Relations
Structures within the Gland
1.External carotid artery
2.Retromandibular vein
3.Facial nerve
1.External carotid artery
2.Retromandibular vein
3.Facial nerve
Capsule
1.False Capsule1.False Capsule
Capsule
1.False Capsule
2.True Capsule
1.False Capsule
2.True Capsule
Accesory PartSemidetached part of the gland, which lies just above the parotid
duct
Semidetached part of the gland, which lies just above the parotid
duct
Parotid Duct5 cm long & emerges from
the anterior border & runs superficial to masseter m.
5 cm long & emerges from
the anterior border & runs superficial to masseter m.
Parotid Duct
Then pierces the buccinator to open in the vestibule of
mouth, opposite the upper 2nd molar tooth
Then pierces the buccinator to open in the vestibule of
mouth, opposite the upper 2nd molar tooth
Arterial SupplyExternal Carotid Artery
Venous DrainageRetromandibular Vein
Nerve Supply1. Sensory:
Auriculotemporal nerve
a. Capsule:
a. Gland:
Great Auricular nerve
Nerve Supply2. Sympathetic:
From the sympathetic plexus around the external carotid.
Nerve Supply3. Parasympathetic:
The secretomotor fibers arise from the inferior salivary nucleus in the medulla oblongata.
Joins the glossopharyngeal nerve (9th cranial)
Leaves the 9th nerve through its tympanic branch which enters the middle ear where it joins the tympanic plexus.
Lesser Petrosal nerve arises from the tympanic plexus as a continuation of the tympanic branch
Enters the foramen ovale to relay in the otic ganglion
Joins auriculotemporal nerve through which they reach the gland
MedullaOblangata
InferiorSalivaryNucleus
Glossopharyngeal n.
TympanicPlexus
LesserPetrosal n.
OticGanglion
Auriculotemporal n.
Surface Anatomy of Parotid Gland
Head ofMandible
Middle ofMasseter m.
2 cm belowAngle ofMandible
MastoidProcess
Surface Anatomy of Parotid Duct
Tragus ofthe ear
Midway between the ala of the nose
and the angle of the mouth
Middle ⅓ of the horizontal line
SubmandibularGland
SubmandibularGland
SiteDigastric triangle,
partly below & partly deep to the mandible
Parts1. Superficial part
2. Deep part
3. Submandibular duct
Superficial partDeep part
Submandibular duct
Superficial Part Wedge shaped, extending:Posteriorly: to the angle of mandible.Superiorly: to mylohyoid line of mandible.Inferiorly: it overlaps the 2 bellies of digastric m
Relations1. Inferolateral surface: related to skin, superficial fascia (containing
platysma, cervical branch of facial n., ant. facial v., LNs) & deep fascia.
2. Lateral surface: related to body of mandible, facial a., mylohyoid n. & a.
3. Medial surface: related to 2 muscles (mylohyoid & hyoglossus) & 2 nerves (lingual & hypoglossal).
Triple Relations of Facial Artery to the Gland
Facial a.
Triple Relations of Lingual Nerve to the Duct
Lingual n.
Hypoglossal n.
Deep PartSmall part lying deep to mylohyoidSuperficial to hyoglossusBetween lingual n. above & hypoglossal n. below
Mylohyoid
Lingual n.
Submandibular Duct5cm long Triple relations with the lingual nerve
Lingual n.
Submandibular Duct5cm long Triple relations with the lingual nerveOpening into the floor of mouth close to frenulum of
the tongue
Frenulum
Nerve Supply
1.Sensory: Lingual nerve
2.Sympathetic: Plexus around the facial artery
3.Parasympathetic:Chorda tympani from Facial nerve
ThankYou