1 - Zill - Pharynxx

Question 1

Pharynx Definition

What opens into the Pharynx?

Answer 1

Tube of muscles and fascia that opens to nasal and oral cavities

Larynx and Esophagus

Question 2

Palatoglossa Arch

What membrane is here?

What is does this boundary represent?

Answer 2

Site of oropharyngeal membrane

Boundary between oral cavity (precise somatic sensory) and Pharynx (imprecise visceral sensory)

Question 3

Clinical: Retropharyngeal Abscess

Answer 3

Infection in retropharyngeal space can spread unimpeded to mediastinum (middle of thoracic cavity

Can also block off airway

Question 4

Muscles of the Pharynx: Constrictors

Superior Constrictor

Origin?

Level of Insertion?

Answer 4

Muscles of the Pharynx: Constrictors

Superior Constrictor

Origin: Pterygo-mandibular Raphe

Level of Insertion: Region superior to hyoid

Continuous Ant. with Buccinator

Question 5

Muscles of the Pharynx: Constrictors

Middle Constrictor

Origin?

Level of Insertion?

Answer 5

Middle Constrictor

Origin: Hyoid

Level of Insertion: Middle to Hyoid

Question 6

Muscles of the Pharynx: Longitudinal

Stylopharyngeus

Origin?

Insertion?

Action?

Nerve?

Answer 6

Stylopharyngeus

Origin: Styloid Process of Temporal Bone

Insertion: Thyroid Cartilage

Action: Raise pharynx, pull walls laterally (make room for passage of food)

Nerve: CN IX (Branchiomotor)

Question 7

Divisions of Pharynx and Boundaries?

Answer 7

1. Nasopharynx: Posterior to nasal cavity, superior to soft palate
2. Oropharynx: Inferior to soft palate, upper border of epiglottis
3. Laryngopharynx: Below epiglottis to, right above lower border of cricoid cartilage

Question 8

Contents of Regions of Pharynx:

Nasopharynx

Oropharynx

Laryngopharynx

Answer 8

Nasopharynx: Paryngeal Tonsil (adenoids), opening of Auditory Tube

Oropharynx: Palatine Tonsils (Tonsilitis), Valleculae (Popcorn 1),

Laryngo Pharynx: Piriform Recesses (Popcorn 2)

Question 9

Clinical: Locations food can get stuck in pharynx?

“Back of Tongue”

“Throat”

Why can you not localize the object?

Answer 9

Oropharynx: Valleculae

Laryngopharynx: Piriform Recesses

The pharynx in Visceral Sensory

Question 10

Innervation of Pharynx

Answer 10

Motor - Branchiomotor

All Vagus (X) except Stylopharyngeus (IX)

Sensory - Visceral Sensory

Nasopharynx - VII

Oropharynx - IX

Laryngopharynx - X

Question 11

Blood Supply to Pharynx

Answer 11

Ascending Pharyngeal

Facial

Lingual

Maxillary