18 Questions
What is the nerve supply of the parotid gland responsible for watery secretion?
Parasympathetic supply
From which spinal segment do the preganglionic sympathetic fibers for the parotid gland arise?
T1
What syndrome is associated with damage to the auriculotemporal and great auricular nerves?
Frey's syndrome
What type of secretion is produced upon stimulation of the sympathetic supply to the parotid gland?
Thick sticky secretion
Which nerve is responsible for the sensory supply of the parotid fascia?
Great auricular nerve (C2 and C3)
How can calculi lodged in the distal portion of the parotid gland be removed?
By splitting up the duct from its opening in the mouth
What are the components found in the auriculotemporal nerve?
Parasympathetic (secretomotor), sensory, and sympathetic fibres.
What is Frey's syndrome characterized by?
Redness, heat, and pain in the ipsilateral cheek (parotid region) when eating, associated with gustatory sweating.
Where does the arterial blood supply for the parotid gland come from?
External carotid and superficial temporal arteries.
Describe the lymphatic drainage pathway of the parotid gland.
Lymphatics from the parotid gland drain into superficial and deep parotid lymph nodes, which then drain into deep cervical lymph nodes.
What happens during regeneration when the great auricular nerve is cut?
Sensory and sudomotor fibers grow into endoneurial sheaths of fibers supplying cutaneous receptors, sweat glands, and blood vessels.
How are the venous drainage routes of the parotid gland?
Venous drainage occurs into retromandibular and external jugular veins.
What is the function of the tortuous course of the parotid duct?
Provide a valve-like mechanism to prevent inflation of the duct system during excessive blowing of the mouth.
How is the parotid duct represented on the face?
By the middle third of the line extending from the lower border of the tragus to the midpoint between the ala of the nose and the red margin of the upper lip.
Why is probing the parotid duct difficult?
Due to its tortuous course.
Where can the parotid duct be found in relation to the zygomatic arch?
One finger’s breadth below it.
How can the parotid duct be damaged in facial injuries?
It may be cut inadvertently during surgical procedures on the face or injured due to facial trauma.
How can calculi (stones) in the parotid gland and duct be visualized radiologically?
By injecting radio-opaque dye through a fine needle or canula inserted into the mouth of the duct in the vestibule of the oral cavity (parotid sialogram).
Test your knowledge on the functions of the auriculotemporal and great auricular nerves, including the pathways of parasympathetic, sensory, sympathetic, and sudomotor fibers. Explore how nerve injuries can lead to unique sensory responses during regeneration.
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