Innervation of Laryngeal Muscles Flashcards
exam 2
Carry impulses from sensory receptors; aka ascending/afferent
Sensory nerves
Contract muscles or innervate glands; aka descending/efferent
motor nerves
How many pairs of cranial nerves are there?
12
Cranial nerves branch off from where?
brainstem
What are the two branches of the vagus (X) nerve?
Superior laryngeal nerve (SLN)
Recurrent laryngeal nerve (RLN)
What branch of the vagus nerve supplies motor to the crico-thyroid?
external SLN
What branch of the vagus nerve penetrates the thyrohyoid membrane to supply sensation to the upper half of the larynx (above VFs)?
internal SLN
What branch of the vagus nerve supplies motor innervation for all intrinsic laryngeal muscles besides the CT?
RLN
What branch of the vagus nerve supplies sensory innervation for the low half of the VFs?
RLN
The recurrent laryngeal branch of the vagus nerve innervates all of the intrinsic laryngeal muscle except the:
a) Lateral cricoarytenoid muscle
b) Thyroarytenoid muscle
c) Posterior cricoarytenoid muscle
d) Cricothyroid muscle
e) Arytenoid muscle
D - CT
The ( ) branch of the ( ) laryngeal nerve is responsible for sensation from the upper half of the larynx system such as touch, pain, and temperature.
a) Internal, recurrent
b) Internal, superior
c) External, recurrent
d) External, superior
B - internal SLN
The major cranial nerve providing innervation to the larynx is:
a) CN I (olfactory)
b) CN II (optic)
c) CN V (Trigeminal)
d) CN VII (facial)
e) CN VIII (auditory)
f) CN IX (glossopharyngeal)
g) CN X (vagus)
G- Vagus (X) nerve
