neurology, the eye and ear Flashcards
what are the seven bones of the orbit
ethmoidal, lacrimal, sphenoid lesser wing, sphenoid greater wing, frontal, maxillary and zygomatic
what passes through the optic foramen
optic nerve and ophthalmic artery
what passes through the superior orbital fissure
oculomotor nerve, ophthalmic nerve, ophthalmic veins and the trochlear nerve
what passes through the inferior orbital fissure
maxillary nerve
the outer fibrous layer of the eye consists of
the sclera and cornea
the middle vascular layer of the eye consists of
choroid,iris and ciliary body
the inner sensory layer consists of the
retina
the watery fluid in the anterior segment of the eye is
the aqueous humour
the gel in the posterior segment is the
vitreous body
the ciliaris is located
posterior to the corneoscleral junction
the function of the ciliaris muscle is
accommodation thickening of the lens
the innervation of the ciliaris muscle is
parasympathetic via the third cranial nerve
the constrictor pupillae location is
the pupillary border of the iris
the innvervation of the constrictor pupil muscle is
parasympathetic via the oculomotor nerve
the dilator pupil muscle is innverated by the
sympathetic innervation throguh long cilaic arteries from the cervical plexus
what are the extrinsic muscles of the eye
medial rectus, lateral rectus, inferior oblique, superior oblique, inferior recuts, superior rectus
medial rectus action
adducts
lateral rectus action
abducts
superior rectus actions
elevates, adducts and intorsion
intorsion refers to
medial rotation
the inferior rectus actions
depresses, abducts and extorsion
extorison refers to
lateral rotation
superior oblique actions
depression, abduction and intorsion
inferior oblique actions
abducts, elevates and rotates extorsion
which extrinsic eye muscle doesn’t arise from the posterior aspect of the orbit
inferior oblique
which ligaments prevent over adduction and over abduction
check ligaments medial and lateral
the function of suspensory ligaments of the eye are to
supports and prevents displacement of the eye
the opthalmic artery is a branch of the
internal carotid artery
what are the types of joint between the malleus and incus
saddle
what type of joint is between the incus and stapes
ball and socket
the stapes has what joint
hinge joint
which ossicle is in connection with the tympanic membrane
malleus
which ossicle is in contact with the oval window
the stapes
what are the two muscles of the ossicles
tensor tympani and the stapedius
the functions of the tensor tympani is
dampen the tymapnic membrane
the function of the stapedius is to
protect the inner ear
the inner and middle ear are contained within what bone
the petrous temporal bone
what fluid is within the bony labyrinth
perilymph
what fluid is within the membranous labyrinth
endolymph
what foramen does the facial nerve exit the posterior cranial fossa
internal acoustic foramen
the chorda tympani seperates from the facial nerve in the
middle ear
chorda tympani supplies the
secretomotor for the sublingual and submandibular gland parasympathetic and the sesnory fibres for taste for the anterior two thirds of the tongue
lymph nodes of face and scalp
parotid, buccal, submental, submandibular, mastoid and occipital
lymphatic drainage of the neck
anterior cervical nodes, superficial cervical nodes, retropharyngeal nodes, laryngeal nodes and tracheal nodes
retropharyngeal nodes drain from the
nasopharynx, auditory tube, and upper cervical column
superficial cervical nodes drain from
parotid, angle of mandible, neck, face and scalp
the right jugular lymph trunk drains into the
junction of the internal jugular and subclavian vein
the left jugular trunk drains into the
thoracic duct
2 features of the anterior cranial fossa
cribiform plate and crista gali
the anterior boundary of the middle cranial fossa
sphenoid lesser wings
the floor of the middle cranial fossa consists of the
greater sphenoid wings and temporal bone squamous and petrous
the pterion is what
H junction of parietal, temporal, sphenoid and frontal bones
olfactory nerve passes through what in the anterior cranial fossa
cribiform plate
what passes thorugh the optic foramen in the middle cranial fossa
optic nerve and ophthalmic arteries
what passes through the superior orbital fissure in the middle cranial fossa
ophthalmic veins, oculomotor nerven abductor nerve
, trochea nerve and sympathetic fibres
what passes through the foramen rotundum in the middle cranial fossa
maxillary nerve V2
foramen ovale in the middle cranial fossa structures that pass through
mandibular nerve V3 and accessory meningeal artery
what passes through the foramen spinosum in the middle cranial fossa
middle meningeal artery and meningeal nerve
what passes through the foramen lacerum in the middle cranial fossa
venous plexus
the carotid canal in middle cranial fossa contains
internal carotid artery
internal acoustic foramen in the posterior cranial foramen contains
facial nerve, vestibulocochlear nerve and labyrinthine artery
jugular foramen contains
Central nerves 9, 10, 11, internal jugular veinpetrosal and sigmoid sinuses
hypoglossal foramen contains the
hypoglossal nerve
the foramen magnum contains the
medulla, meninges, vertebral arteries, cranial nerve 11, dural veins, posterior and anterior spinal arteries
what houses the pituitary gland
the sella turica
a groove on the either side of the sella turica is for
cavernous svenous sinus
flat bones of the skull grow by
intramembranous ossification
irregular bones of the skull grow by
endochondral
parotid gland secretes
serous
the submandibular gland secrete
mixture
sublingual salivary
mucous
the function of the pyramids
corticospinal tract, corticobulbar, motor fibres and pyramidal tracts
at what vertebral level of the spinal cord terminate at
L2
at what vertebral level does the dura mater terminate
S2
at what vertebral arachnoid mater terminate
S2
Lumbar puncture level
L4
spinal nerve pairs
31
left and right vertebral arteries arise
subclavian
carotid bifurcates at
C4
ventro basilar
cerebellum and brain stem
what nerve arises from above the superior cerebellar artery
oculomotor
superior ophthalmic artery drains into the
cavernous sinus
what venous sinus runs along the attachment of the falx cerebri to the tentorium
straight sinus
middle meningeal artery arises from the
foramen spinosum
the anterior horns of the lateral ventricle are separated by the
septum pellucidum
the fold of dura mater that surrounds the gland is called
diaphragma sellae
red nucleus lies posterior to the
substantia nigra