Anatomy of the larynx-Must know Flashcards
Motor innervation:
what innervates the cricothyroid muscle?
external branch of SLR
Motor innervation:
bc it supplies all the muscles of the larynx except the cricothyroid, the _____ nerve is the MAJOR MOTOR NERVE of teh larynx
RLN
Motor innervation:
what branch of the SLN is motor?
External (Me)
Sensory innervation:
what is the major sensory nerve
INTERNAL branch on the SLN
(Is)
Me= motor external
Is = Internal sensory
Sensory innervation:
what nerve supplies the laryngeal tissue from the vocal cords up? (including the VC)
Superior Laryngeal Nerve (SLN)
Sensory innervation:
what nerve supplies the sensory innervation to the laryngeal mucosa inferior to the vocal cords?
Recurrent Laryngeal Nerve (RLN)
Larynx Innervation:
what does the SLN do?
3 things
Motor external branch ( cricothyroid)
Sensory Internal branch
Sensory for everything from Vocal cords up (vocal cords and epiglottis)
Larynx Innervation:
what does the RLN do?
2 main things
Controls sensory below the vocal cords
controlls all muscles except cricothyroid
Label the larynx:
where is the thyroid cartilage and what level is it at?
b/t hyoid bone and cricord cartilage
Label the larynx:
where is the thyroid bone and what level is it at?
Above thyroid cartilage
C2
Label the larynx:
where is the cricoid cartilage and what level is it located at?
below the thyroid cartilage
C6
Anatomy 101:
how many cartilagles are there?
9
Anatomy 101:
how many paired cartilages are there?
3
Anatomy 101:
how many non paired cartilages are there?
3
Anatomy 101:
Name the 3 non paired cartilages
epiglottis
thyroid
cricord
Anatomy 101:
name the 3 paired cartilages
Cunieform x2
Corniculates x 2
Arytenoids x 2
(in that order from superior to inferior- just know the C’s are first in ABC order then the A)
Anatomy 101:
List all of the 9 cartilages of the larynx in order from superior to inferior
Epiglottis Cartilage
Thyroid Cartilage
Conieform Cartilage x 2
Corniculates x 2
Arytenoids x 2
Cricord cartilage
Anatomy 101:
what nerve does the right and left RLN branch (or arise) from
Vagus Nerve
Anatomy 101:
what cranial nerve is the sensory below the cords
Vagus
Intrinsic Laryngeal Muscles:
what is the function of the Posterior Cricoarytenoids
ABducts the cords (dialates the cords)
think: Pulls Cords Away
Posterior CricoArytenoids
Intrinsic Laryngeal Muscles:
what is the function of the lateral cricoarytenoid muscles
ADDucts the cords
Intrinsic Laryngeal Muscles:
what is the function of the Cricothyroid muscles
Tenses the cords
Intrinsic Laryngeal Muscles:
what is the function of the Thyroarytenoid muscles?
Relaxes the cords
LOOK at diagram understand
what muscles are involved in a laryngospasm
CricoThyroid
Lateral CricoArytenoids
Thyroarytenoids
Think of CAT
