12. Nerve Supply
• The glossopharyngeal nerve carries
preganglionic parasympathetic
secretomotor fibers.
• These pass into the tympanic nerve and
synapse in the otic ganglion
• Postganglionic fibers attach to the
auriculotemporal nerve and follow that
to the gland.
13.
14. Parotid Duct Injury
The parotid duct, which is a comparatively superficial structure on the
face,may be damaged in injuries to the face or may be inadvertently cut
during surgical operations on the face. The duct is about 2 in. (5 cm) long
and passes forward across the masseter about a fingerbreadth below the
zygomatic arch.
15. Parotid Salivary Gland and Facial Nerve
Lesions
• The important facial nerve lies in the interval
between deep & superficial parts.
• A benign parotid neoplasm rarely, if ever, causes
facial palsy.
• However, a malignant tumor of the parotid is
usually highly invasive and quickly involves the
facial nerve, causing unilateral facial paralysis.
16. Parotid Gland Infections
• The parotid gland may become acutely
inflamed as a result of retrograde
bacterial infection from the mouth via the
parotid duct.
• The gland may also become infected via
the bloodstream, as in mumps. In both
cases, the gland is swollen; it is painful
because the fascial capsule derived from
the investing layer of deep cervical fascia
is strong and limits the swelling of the
gland.
17. Frey’s Syndrome
• Is complication develops after penetrating wounds of the parotid gland.
When the patient eats, beads of perspiration appear on the skin
covering the parotid. This condition is caused by damage to the
auriculotemporal and great auricular nerves.
• During the process of healing, the parasympathetic secretomotor fibers
in the auriculotemporal nerve grow out and join the distal end of the
great auricular nerve.
23. Submandibular Salivary Gland: Calculus Formation
is a common site of calculus formation., Rare
condition
The presence of a tense swelling below the body of
the mandible, which is greatest before or during a
meal and is reduced in size or absent between meals,
is diagnostic of the condition.
Examination of the floor of the mouth will reveal
absence of ejection of saliva from the orifice of the
duct of the affected gland.stone can be palpated in
the duct, which lies below the mucous membrane of
the floor of the mouth.
24. • Submandibular Lymph Node Enlargement and Submandibular
Salivary Gland Swelling
• The submandibular lymph nodes are commonly enlarged as a result of
a pathologic condition of the scalp, face, maxillary sinus, or oral cavity.
• E.g acute infection of the teeth.
25. Coronal section through the superficial and deep parts of the submandibular salivary glands.
C. Coronal section(anterior to B) through the sublingual salivary glands and the ducts of the
submandibular salivary glands.
26. Nerve Supply
• The facial nerve provides the
parasympathetic
secretomotor supply via its
chorda tympani branch and
the submandibular ganglion
• The postganglionic fibers pass
directly to the gland.
