Gag Reflex Flashcards
What su the pharynx involved in
Breathing Sneezing Coughing Speech Vomiting Swallowing Gagging
How does the pharynx protect against aspiration
Aspiration - inhalation of solids/liquids into lungs such a fragments of teeth etc
Where is the nasopharynx
Posterior to nasal cav
Base of sphenoid down soft palate to inferior border
Pharyngeal tonsils
Where is the oropharynx
Beihind oral cav
Where is the laryngopharynx
From superior border of epiglottis and runs down and meets oes start at C6
What does the eustanchion/auditory tube do
Connects pharynx up to Middle ear
What are the layers from the pharynx to cervical vertebrae
Pharynx Pharyngeal muscle Buccooharyngeal fascia Alar fascia Retropharyngeal space Prevertebral fascia Prevertebral muscle Anterior longitudinal ligament Vertebrae
What are the external layer of muscles of the pharynx known as
Circular muscles which overlap eachother
are the circular muscles vol or invol
Vol
Even though the circular muscles are said to be vol what is unusual
Contract sequentially out with control
What innervates the circular muscles
Vagus never via pharyngeal plexus
Where do all the circular muscles insert onto
Midline raphe
What muscle attaches to cricoid cartilage and where is this
Cricopharyngeus at inferior constrictor muscle
What are the 3 constrictor muscles
Superior
Middle
Inferior
What su the fascia which connects the occipital bone to the constrictor muscles
Pharyngobasilar fascia
What are the gaps between the pharyngeal muscles called
Gateway to the mouth
What passes thro the gateway to the mouth
Glossopharyngeal
Lingual artery
Stylopharyngeus muscle
What is the different longitudinal muscle
Stylopharyngeus
Styloid process
Passes thro gateway to the mouth with Glossopharyngeal nerve
Only muscle supplied by Glossopharyngeal
What are the other longitudinal muscles
Palatopjaryngeus.
Salpingopharungeus
What is the palatopharyngeus
Connect from soft palate
What is the salpingopharyngeus
Opening of auditory tube
Cartilage of pharyngotympanic tube
What do the longitudinal muscles do and where do they insert to
They elevate pharynx and larynx
Insert onto posterior border of thyroid cartilage and wall of pharynx
What cranial nevre innervates the palatopharyngeus and salpingopharyngeus
Vagus
What kind of cartilage is the epiglottis
Elastic
