Anatomy Flashcards
What innervates cricothyroid muscle
external laryngeal
What is action of cricothyroid muscle
tenses vocal cords
What innervates muscles of intrinsic larynx
inferior laryngeal except cricothyroid muscle
What is action of posterior cricoarytenoid muscle
abducts vocal cords
What is action of thyroarytenoid muscle
relaxes vocal cords, responsible for change in pitch, also known as vocalis muscle
What is action of aryepiglottic muscle
closes the vestibule, prevents food from entering trachea
Which intrinsic muscles of larynx are continuous
oblique arytenoid and aryepiglottic
Carries sensory info from conus elasticus
inferior laryngeal
Carries sensory info from quadrangular membrane
internal laryngeal
motor neuron to cricothyroid and inferior constrictor
external laryngeal
pyriform aperture stenosis
narrow opening of nose due to overgrowth of maxilla, congenital defect requiring surgery
which arteries supply blood to the lateral wall
ophthalamic (internal carotid) and maxillary (external carotid)
Kiesselbach’s plexus
anastomoses between arteries of septum: sphenopalantine, greater palantine, and superior labial
sensory nerves from mucous membranes
maxillary and ophthamalic- branches of trigeminal (CN 5)
preganglionic parasympathetics to nose
greater petrosal nerve (from facial, CN 7), mucous membrane secretion in nose, nasopharynx, hard and soft palates
postganglionic sympathetics to nose
deep petrosal nerve (from internal carotid n.), innervates VSMC
drains into middle meatus
frontal, anterior ethmoid, middle ethmoid, and maxillary sinuses
drains into superior meatus
posterior ethmoid sinus
drains into inferior meatus
nasolacrimal duct
drains into sphenoethmoid recess
sphenoid sinus
boundaries and sensory innervation of nasopharynx
nasal cavity, hard and soft palates
maxillary n. (branch of CN 5)
boundaries and sensory innervation of oropharynx
oral cavity
glossopharyngeal n. (CN 9)
boundaries and sensory innervation of laryngopharynx
epiglottis to cricoid cartilage
vagus n. (CN 10)
what connects nasopharynx with middle ear?
eustachian tube/ pharygotympanic tube
what are the 3 MALTs and where do they drain?
pharyngeal (adenoids), palantine (tonsils), lingual jugulodigastric LN (part of deep cervical LN)
VATER
vertebral defects
anal atresia
trachesophageal fistula
renal defects and radial forearm anomalies
VACTERL
verterbral defects anal atresia cardiovascular defects trachesophageal fistula renal defects limb defects
Which muscles adduct vocal ligaments
transverse arytenoid and oblique arytenoid
embryonic state
weeks 3-6
development up to tertiary segments
pseudoglandular period
weeks 6-18
development thru terminal bronchioles
canalicular period
weeks 16-26
development of respiratory bronchioles
saccular period
weeks 26- birth
development of primordial alveoli, type I and II pneumocytes
alveolar period
week 32- 3 years
alveolar ducts and sacs that mature after birth
