Theme 5 Anatomy quiz Flashcards
what are the posterior relationships of the ITF
Common carotid artery
Internal jugular vein
CNIX,X,XI
styloid apparatus
what are the boundaries of the submandibular region
Anterior belly of digastric Posterior belly of digastric Inferior border of body of mandible Floor- mylohyoid, hyoglossus and middle constrictor Roof- deep cervical fascia
what would happen if the inferior alveolar nerve was cut
loss of sensation to the mandibular teeth and skin of the lower lip
what is attached to the mylohyoid line
mylohyoid muscle
the pterygomandibular raphe is attached to the posterior end of that line
what does ps activation to the submandibular gland cause
production on an enzyme rich secretion
which muscles does the hypoglossal nerve cross as ot passes anteriorly
medial surface of mylohyoid
lateral surface of hyoglossus
what muscle is attached to inferior genial tubercle
geniohyoid
What structure normally occupies the sublingual fossa
sublingual salivary gland
what is the fucntion of the submandibular ganglion
contains postganglionic neurones that innervate the submandibular and sublingual salivary glands. It is also a structure of passage for sympathetic and sensory axons going to and from these glands respectively.
what is the function & innervation of styloglossus
elevates sides of tongue
retracts
hypoglossal nerve
what is the function & innervation of stylohyoid
raised hyoid bone
facial nerve
what is the function & innervation of stylopharngnyeus
muscle raises the larynx and pharynx
glossopharyngeal nerve
what the fucntion of the mylohyoid
muscle from a mobile diaphragm for the floor of the mouth. When it contracts it will raise the floor of the mouth, tongue and hyoid bone or if the hyoid bone is fixed it will depress the mandible and lower the tongue
what structures does the lingual artery supply
tongue and structures forming the floor of the mouth.
what important br does the facial artery give in the neck
submental
what do sensory roots of ganglia do
conveys sensory axons from the target organ(s) of the ganglion, and that have passed through the ganglion also without synapsing, to a branch of the trigeminal nerve to be conveyed back to the brain.
what nerve receives info from the taste buds in cirumvallate papilla
IX
Which nerve receives information about touch from the mucous membrane posterior to sulcus terminalis
IX
What nerve receives information about taste from the mucous membrane posterior to the structure sulcus terminalis
IX
What folds of mucous membrane bound the vallecula
The lateral and median glossoepiglottic folds.
what lies posterior to vallecula
epiglottis
Describe the route taken by taste fibres from the ant 2/3 of the tongue until the point that they enter the skull
Taste axons pass from the taste buds and enter the lingual nerve. They leave to join the chorda tympani within the infratemporal fossa and enter the brainstem within the facial nerve of which the chorda tympani is a branch
Which of the extrinsic muscles pull the back of the tongue upwards
Styloglossus and palatoglossus.
Which arch is usually considered the junction between the oral cavity and the pharynx
the palatoglossal arches.
Describe the relationship that the lingual nerve has to the submandibular duct
The lingual nerve lies initially above the deep portion of the submandibular gland and on the lateral surface of the hyoglossus from where it descends to cross the duct superficially. It then ascends on the medial side of the duct and then breaks up into its terminal branches as it passes into the tongue. Thus, it is sometimes said to ‘double-cross’ the duct.
The lingual nerve may be injured during surgery on one particular tooth because of its proximity to that tooth. Name the tooth in question.
The 3rd mandibular molar (lower 8).
If you were unfortunate (or clumsy) enough to sever the lingual nerve completely on one side, what functional deficits would you expect your patient to suffer
You would leave your patient with a unilateral loss of touch and taste sensation from the anterior two thirds of the tongue, and loss of sensation from the floor of the mouth and lingual gingivae. Salivation on that side from the submandibular and sublingual salivary glands would also be impaired.
What is the relationship of hypoglossal nerve to (a) the carotid arteries and (b) the posterior digastric muscle?
The hypoglossal nerve crosses the external and internal carotid arteries superficially and lies deep to the posterior belly of the digastric muscle.
What structure normally covers IX medially
palatine tonsil.
What would be the effect of damage to IX
Loss of taste and touch sensation from the posterior one third of the tongue, loss of sensation from the posterior part of the oropharynx and as a result usually accompanied by disturbances of swallowing (dysphagia).
