APEX Airway Anatomy Flashcards
Intrinsic Muscles of the larynx
Chubby tired leprochauns piss terrible venom- Kanye, oblique (8)
1 Cricothyroid
2 Thyroarytenoids
3 Lateral cricoarytenoids
4 Posterior cricoarytenoids
5 Traverse arytenoids
6 Vocalis
7 Aryepiglottic
8 Obliquie arytenoid
Extrinsic muscles of larynx
hyoid x 6
Digastric x 2
1st 3 depress, last 5 elevate
Omohyoid
Sternohyoid
Sternothyroid
Mylohyoid
Stylohyoid
Thyrohyoid
Anterior belly digastric
Posterior belly digastric
Posterior cricoarytenoids
Post- ab
Do abs last (post)
Abduct vocal cords
The ONLY TO ABDUCT
Lateral cricoarytenoids
Adduct vocal cords
Cricothyroid
Elongates (tense) vocal cords
Cricothyroid is long
The only thing to ELONGATE (TENSE)
The rest rest bc theyre lazy
Thyroarytenoids
They are short (inside when you see them)
Shorten(relax) vocal cords
SLN
IB- sensory above glottis (to the bottom of epiglottis)
EB- innervation to cricothyroid
RLN
Sensory below glottisMotor to all larynx muscles except (cricothyroid)
Vocalis
Shortens vocal chords
Short people are vocal
Thyroarytenoids
Adducts
Only one thing abducts- pc
CN5
Provides sensory to face and head
V1 Opthalmic- nares, ant 1/3 of septum
V2 maxillary- Turbinates, nasal septum
V3 Mandibular- anterior 2/3 of tongue
CN9
Glossopharyngeal nerve
Sensation from oropharynx to anterior epiglottis
Affferant limb of gag reflex
CN10
Vagus
SLN+RLN
SLN- IB & EB
IB sensory above cords to bottom of epiglottis
EB- Motor to circoythroid
RLN- Sensory below glottis to trachea, motor to all except cricothyroid
Efferent of gag reflex
RLN injury outcomes
Unilateral- no issue
Bilateral acute- major distress
Bilateral chronic- no issue
Risk factor for RLN injury (either side)
Overinflated ETT
Tumor
Excessive neck stretching
Neck surgery
Risk factor for L RLN injury
PDA Ligation, LA enlargment (mitral stenosis), AAA, thoracic tumor
Risk factor for R RLN injury
Rare, doesnt cause respiratory distress