Neck 2 Flashcards
what is the formal name for the voice box
Larynx
what is the larynx continuous with
trachea
what is the continuation of the pharynx
esophagus
level of thyroid
C5-T1
what connects the 2 lobes of the thyroid
Isthmus
what percentage of the population have an extra lobe called the pyramidal lobe on the thyroid
50%
what artery supplies the thyroid
superior thyroid (External carotid) inferior thyroid (thyrocerviacl trunk)
Ima thyroid artery in what percentage of population
10%
two veins that drain thyroid
- Superior thyroid vein
- middle thyroid vein
- Inferior thyroid vein
- Superior thyroid vein
- middle thyroid vein
drain into what vein
Internal jugular vein
Inferior thyroid vein drains into what
brachiocephalic vein
what glands on the back of the thyroid glands
parathyroid
what is the pharynx posterior to
- Nasal cavity
- Oro cavity
- larynx
what is inferior to the pharynx
esophagus
3 sections of the pharynx
- Nasopharynx
- Oropharynx
- Laryngopharynx
Constrictor Muscles (3)
- Superior
- Middle
- Inferior
Constrictor Muscles constrict when
swallowing
Constrictor Muscles innervation
vagus
origins of Superior Constrictor (2)
- Pterygoid hamulus of sphenoid bone and 2. mandible
origins of middle Constrictor
Hyoid
origins of inferior Constrictor
Thyroid Cartilage and Cricoid Cartilage
Stylopharyngeus
innervation
Glossopharyngeal (CN IX)
where can food get stuck
Piriform recesses
what nerve sensory to Mucosa of
Oropharynx
Glossopharyngeal nerve (CN IX)
what nerve Sensory:
Mucosa of
Laryngopharynx
vagus
gag reflex what nerves
9, 10
2 functions of larynx
- sound production
2. respiration protection
The larynx is what to the hyoid
inferior
what vertebral levels cover the larynx
C3-C6
flat portion of thyroid
laminae
point of thyroid is called
Laryngeal prominence
2 horns of thyroid are called
- superior horn
2. Inferior horn
below the thyroid is the
cricoid cartilage
what covers the laryngeal inlet
Epiglottic Cartilage
sit on top of cricoid
Arytenoid Cartilages
function of Arytenoid Cartilages
change pitch of voice
what levels for Tracheotomy
2-4 tracheal ring
done in an emergency situations for a blocked airway
Cricothyrotomy
Connects epiglottic and arytenoid cartilages
Quadrangular Membrane
between inlet and vestibular folds
Vestibule
False vocal cords
Vestibular Folds
between vestibular and vocal folds
Ventricle
true vocal cords are also called
Vocal folds
during speaking vocal folds are in what position
adducted
what folds Located between thyroid cartilage and arytenoid cartilage
Vocal folds
Length, size, and tension determine pitch
vocal folds
what group and muscle elevate larynx (1,1)
- suprahyoid group
2. thyrohyoid muscle
2 Infrahyoid muscles that depress larynx
sternothyroid depress (ana cervicalsis)
Intrinsic Muscles of the Larynx
innervation
Inferior laryngeal nerve
Intrinsic Muscles of the Larynx
exception
Exception: Cricothyroid muscle (innervated by external branch of superior laryngeal nerve)
Aryepiglottic action
Action: Close laryngeal inlet
Intrinsic Muscles of the Larynx
that adduct vocal folds
Lateral Cricoarytenoid
Transverse Arytenoid
Oblique Arytenoid
Superior Laryngeal Nerve branch of
vagus
what muscle causes voice to be higher
Cricothyroid
causes voice to be deeper
Thyroarytenoid
innervation to the larynx
vagus nerve
sensory only to mucosa of larynx superior to vocal folds
Internal branch of Superior Laryngeal Nerve
2 terminal braches of recurrent larangeal
superior Laryngeal Nerve
Inferior Laryngeal Nerve
Sensory: mucosa inferior to vocal folds
Inferior Laryngeal Nerve
thyroid is deep to what muscles
- sternohyoid
2. sternothyroid
• Motor to constrictor muscles
vagus
• Sensory from mucosa of oropharynx
Glossopharyngeal (CN IX)
• Connects epiglottic and arytenoid cartilages; border is vestibular fold
o Quadrangular membrane
Aperture between
vocal folds
Rima Glottidis
Depressor of Larynx
Sternothyroid
Elevator of Larynx
Thyrohyoid
what muscle Action: Abduct vocal folds
Posterior Cricoarytenoid
pierces thyrohyoid
membrane
superior larengeal nerve internal branch
Horners
- Drooping upper eyelid
- Decreased sweating
- Constricted pupil
Horners syndrome is damage to what
o Results from unilateral damage to the sympathetic nervous system (cervical or thoracic)
Horners associated with what ganglia
paravertebral ganglia