Anatomy theme 6 Flashcards
What are the 4 layers of the Pharyngeal wall ?
areolar coat
muscular coat
submucosa/pharyngobasilar fascia
mucosa
What is the areolar coat ?
covers the exterior of the pharynx
acts as a neurovascular transport medium
What is the muscular coat ?
it consists of the circular and longitudinal muscles
What are the circular muscles ?
sup/middle/inferior constrictors
What are the longitudinal muscles ?
stylopharyngeus
palatopharyngeus
What is the submucosa/pharyngobasilar fascia ?
tough fibrous coat
anchors the pharynx to the base of the skull as U shaped attachment
What is the path of the fascia that connects the pharynx to the base of the skull ?
from the medial pterygoid plate to the carotid canal
through the pharyngeal tubercle
What does the mucosa do ?
coats the internal aspect of the pharynx
What are the semi lunar constrictor muscles ?
superior
middle
inferior
What are the attachments of the superior constrictor muscle ?
arises from the pterygomandibular raphe and fans out posteriorly to meet the pharyngeal raphe
Where is the pharyngeal raphe anchored ?
to the base of the skull at the pharyngeal tubercle
What are the attachments of the middle constrictor muscle ?
arises from the bony interval between the lesser and greater cornu of the hyoid bone and a small part of the stylohyoid ligament and insert into the pharyngeal raphe
What are the 2 parts of the inferior constrictor muscle ?
cricopharyngeus
thyropharyngeus
Where do the parts of the inferior constrictor arise and insert ?
they arise from the cricoid and thyroid cartilages and insert into the pharyngeal raphe
What are the longitudinal muscles ?
palatopharyngeus and stylopharyngeus
What are the attachments of palatopharyngeus ?
from the palatal aponeurosis and auditory tube to the hyoid bone and thyroid cartilage
What are the attachments of stylopharyngeus ?
arises from the styloid process and inserts into the hyoid bone and thyroid cartilage
What in the innervation of the muscles of the pharynx ?
all supplied by the pharyngeal plexus of the vagus except for stylopharyngeus - glossopharyngeal
What is the interior of the pharynx divided into ?
oropharynx
nasopharynx
laryngopharynx
What is the nasopharynx ?
superior portion of the pharynx
it lies above the soft palate
communicates with the nasal cavity through the choanae
What are the walls of the nasopharynx lined with ?
respiratory ciliated columnar pseudostratified epithelium.
What are the structures found in the nasopharynx ?
opening of the auditory tube
salpingopharyngeal fold
pharyngeal recess
pharyngeal tonsil
What is the salpingopharyngeal fold ?
a muscle covered with a mucous membrane and is a small part of the palatopharyngeus - it helps control the opening of the auditory tube
What is the pharyngeal tonsil ?
a collection of lymphoid tissue found on the superoposterior wall of the nasopharynx