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Thyroid & Larynx Anatomy
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Thyroglossal Duct Cysts:
What are they? How do you distinguish if it's a cyst or the thyroid?
Remnants of the gland in the duct
Deglutition Test or Protrusion of tongue
moves the cyst
Tx
: Sistrunk's operation cyst excision careful w/hypoglossal n.
Near Total Thyroidectomy?
Thyroidotomy?
Near Total Thyroidectomy:
post. part of each lobe preserved to protect
recurrent
&
sup. laryngeal n.
& spare
PT
Thyroidotomy:
cut into thyroid to access larynx or biopsy
Complications of Thyroidectomy
injury to
recurrent laryngeal nerves
inadverten removal of
PT glands
- tetany
Vocal Cords
vocal cords = vocal ligament + vocalis m.
Rima vestibuli vs. Rima glottitis
Rima vestibuli
: space between
TRUE
vocal cords
Rima glottitis
: space between
FALSE
vocal cords
Nerves, Arteries & Veins of the Larynx
Sup. laryngeal A & V w/Internal laryngeal N
- internal surface of larynx
Inf. laryngeal A & V w/Recurrent laryngeal N
- mucous membrane & inf. muscles
Cricothyroid A.
Veinous Drainage
Sup. Laryngeal V --> Sup. thyroid V --> IJV
Inf. Laryngeal V --> Inf thyroid V --> L brachiocephalic V.
Innervation of Laryngeal muscles
All
intrinsic
muscles
Recurrent Laryngeal N.
EXCEPT
cricothyroid
muscle
External Laryngeal N.
Recurrent Laryngeal Nerve
Function?
Lesion?
Function:
ALL intrinsic m. EXCEPT cricothyroid
Lesion:
respiratory obstruction
hoarseness
loss of sensation
BELOW
vocal cord
Internal Laryngeal Nerve
Function?
Lesion?
Function:
mucous membrane ABOVE vocal cords
taste buds on epiglottis
Lesion:
loss of sensation
ABOVE
vocal cords
loss of taste on epiglottis
External
Laryngeal Nerve
Function?
Lesion?
Function:
cricothyroid
inf. pharyngeal constrictor
Lesion:
fatigued voice
weak hoarseness
Author
catitasilva
ID
122967
Card Set
Thyroid & Larynx Anatomy
Description
thyroid larynx
Updated
2011-12-12T05:07:16Z
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