Theme 5 Anatomy quiz

Question 1

what are the posterior relationships of the ITF

Answer 1

Common carotid artery
Internal jugular vein
CNIX,X,XI
styloid apparatus

Question 2

what are the boundaries of the submandibular region

Answer 2

Anterior belly of digastric 
Posterior belly of digastric 
Inferior border of body of mandible 
Floor- mylohyoid, hyoglossus and middle constrictor 
Roof- deep cervical fascia

Question 3

what would happen if the inferior alveolar nerve was cut

Answer 3

loss of sensation to the mandibular teeth and skin of the lower lip

Question 4

what is attached to the mylohyoid line

Answer 4

mylohyoid muscle

the pterygomandibular raphe is attached to the posterior end of that line

Question 5

what does ps activation to the submandibular gland cause

Answer 5

production on an enzyme rich secretion

Question 6

which muscles does the hypoglossal nerve cross as ot passes anteriorly

Answer 6

medial surface of mylohyoid

lateral surface of hyoglossus

Question 7

what muscle is attached to inferior genial tubercle

Answer 7

geniohyoid

Question 8

What structure normally occupies the sublingual fossa

Answer 8

sublingual salivary gland

Question 9

what is the fucntion of the submandibular ganglion

Answer 9

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.

Question 10

what is the function & innervation of styloglossus

Answer 10

elevates sides of tongue
retracts
hypoglossal nerve

Question 11

what is the function & innervation of stylohyoid

Answer 11

raised hyoid bone

facial nerve

Question 12

what is the function & innervation of stylopharngnyeus

Answer 12

muscle raises the larynx and pharynx

glossopharyngeal nerve

Question 13

what the fucntion of the mylohyoid

Answer 13

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

Question 14

what structures does the lingual artery supply

Answer 14

tongue and structures forming the floor of the mouth.

Question 15

what important br does the facial artery give in the neck

Answer 15

submental

Question 16

what do sensory roots of ganglia do

Answer 16

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.

Question 17

what nerve receives info from the taste buds in cirumvallate papilla

Answer 17

IX

Question 18

Which nerve receives information about touch from the mucous membrane posterior to sulcus terminalis

Answer 18

IX

Question 19

What nerve receives information about taste from the mucous membrane posterior to the structure sulcus terminalis

Answer 19

IX

Question 20

What folds of mucous membrane bound the vallecula

Answer 20

The lateral and median glossoepiglottic folds.

Question 21

what lies posterior to vallecula

Answer 21

epiglottis

Question 22

Describe the route taken by taste fibres from the ant 2/3 of the tongue until the point that they enter the skull

Answer 22

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

Question 23

Which of the extrinsic muscles pull the back of the tongue upwards

Answer 23

Styloglossus and palatoglossus.

Question 24

Which arch is usually considered the junction between the oral cavity and the pharynx

Answer 24

the palatoglossal arches.

Question 25

Describe the relationship that the lingual nerve has to the submandibular duct

Answer 25

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.

Question 26

The lingual nerve may be injured during surgery on one particular tooth because of its proximity to that tooth. Name the tooth in question.

Answer 26

The 3rd mandibular molar (lower 8).

Question 27

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

Answer 27

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.

Question 28

What is the relationship of hypoglossal nerve to (a) the carotid arteries and (b) the posterior digastric muscle?

Answer 28

The hypoglossal nerve crosses the external and internal carotid arteries superficially and lies deep to the posterior belly of the digastric muscle.

Question 29

What structure normally covers IX medially

Answer 29

palatine tonsil.

Question 30

What would be the effect of damage to IX

Answer 30

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).