Lecture 11 Flashcards
A tendon in the lacrimal gland separates it into what two parts?
orbital and palpebral
part of lacrimal gland located in lacrimal fossa in frontal bone
orbital
part of lacrimal gland inferior to levator palpebrae superioris
palpebral
(T/F) Tears drain from lateral to medial.
true
What are the 7 bones of the orbit?
- frontal
- zygomatic
- maxilla
- lacrimal
- sphenoid
- ethmoid
- palatine
What are the 3 passageways in the orbit?
- optic canal
- superior orbital fissure
- inferior orbital fissure
Axes of the eyeball?
- AP axis
- vertical axis
What are the 6 extraocular muscles?
- medial rectus
- lateral rectus
- superior rectus
- inferior rectus
- superior oblique
- inferior oblique
The superior oblique muscle is innervated by which cranial nerve?
-trochlear nerve
The lateral rectus muscle is innervated by which cranial nerve?
-abducens nerve
The oculomotor nerve innervates which 4 muscles?
- superior rectus
- medial rectus
- inferior rectus
- inferior oblique muscle
The optic canal is innervated by which cranial nerve?
CN2
The superior orbital fissure is innervated by which cranial nerves?
CN 3, 4, 5, 6
The inferior orbital fissure is innervated by which cranial nerve?
CN5
The orbital ring is innervated by which cranial nerves?
CN 2, 3, 5, 6
The superior ophthalmic vein passes through which 2 structures?
-superior orbital fissure and within the ring
The ophthalmic artery passes through which two structures?
optic canal and within the ring
What is the movement for inferior oblique muscles and for superior oblique muscles?
- IO: medial and upward
- SO: medial and downward
What is the major blood supply of the eye?
- ophthalmic artery (major)
- central retinal artery (minor)
What region does the central retinal artery supply?
-nerve and retina tissue
What are the 3 intrinsic eye muscles?
- ciliary muscle
- sphincter pupillae
- dilator pupillae
Which intrinsic muscles have parasympathetic innervation and which is sympathetic?
- parasympathetic: ciliary muscle and sphincter pupillae
- sympathetic-dilator pupillae
- (X) causes lens to become round
- (Y) constricts the pupil.
- (Z) dilates pupil
X-ciliary muscle
Y-sphincter pupillae
Z-dilator pupillae
Where is the oral cavity?
- inferior to nasal cavities
- continue to oropharynx and pharynx
Between teeth and lining of lips and cheeks
oral vestibule
Where is oral cavity proper?
- lateral-teeth and gums
- superior-palates
- posterior-to oropharynx
- floor-tongue
What are the 4 main parts of the lip?
- philtrum
- skin
- fat
- oral commissure
What 2 things does the oral vestibule consist of?
-lips and cheeks
From the oral cavity proper, what is the difference between hard and soft palate?
- hard-help chew food
- soft- close nasopharynx
What 2 bones form hard palate?
-maxilla and palatine bone
What are the 3 sets of foramina in the hard palate?
- incisive fossa
- greater palatine foramen
- lesser palatine foramen
Where is the nasopalatine nerve found?
-incisive fossa
What are the 5 sets of muscles in the soft palate?
- tensor veli palatini
- levator veli palatini
- palatopharyngeus
- palatoglossus
- musculus uvalae
What is the function and innervation of tensor veli palatini?
- tense soft palate and open pharyngotympanic tube when swallowing
- innervate by CNV3
What is the function and innervation of levator veli palatini?
- elevates soft palate when swallowing
- innervate by CNX
What is the function and innervation of palatopharyngeus?
- elevate larynx and pharynx
- CNX
What is the function and innervation of palatoglossus?
- elevates 1/3 posterior tongue
- CNX
What is the function and innervation of the musculus uvulae?
- elevates uvula
- CNX
What are the 3 major salivary glands?
- parotid gland
- submandibular gland
- sublingual gland
Which duct pierces the buccinator muscle to enter oral cavity?
- facial nerve
- external carotid artery
- retromandibular vein
What are the 4 main functions of the tongue?
- swallowing
- speech
- mastication
- taste
Which parts of the tongue does not contain taste buds?
-filiform papillae
What are the 3 extrinsic muscles of the tongue and their innervation?
- styloglossus
- genioglossus
- hypoglossus
- innervate by CNXII
Which extrinsic muscle elevates and retracts tongue?
styloglossus
What is the function of the genioglossus extrinsic muscle?
-depress and protrude tongue
Which extrinsic muscle depresses and retracts tongue?
-hyoglossus
Which intrinsic muscle shortens and curls tongue?
-superior longitudinal
Which intrinsic muscle shortens and uncurls tongue?
-inferior longitudinal
What is the function of the transverse and vertical intrinsic tongue muscles?
T-narrow tongue
V-flatten tongue
What are the 3 arterial supplies of the tongue?
- lingual artery
- sublingual artery
- deep lingual artery
The lingual artery branches out of which artery?
-external carotid artery
What are the 2 floor muscles of the oral cavity?
- mylohyoid
- geniohyoid
Which muscle supports the floor of oral cavity?
mylohyoid
Which muscle elevates hyoid when mandible is fixed and depresses mandible when hyoid fixed?
geniohyoid
Geniohyoid will elevate/depress hyoid when mandible fixed.
elevate
Geniohyoid will elevate/depress mandible when hyoid fixed.
depress
