Random 2 Flashcards
What types of joints are found between the ossicles?
Synovial
Which ossicle is in contact with the tympanic membrane?
Malleus
Which ossicle is in contact with the oval window?
Stapes
Name two muscles related to the ossicles
Tensor Tympani and Stapes
Tensor Tympani function
Dampen Loud Sounds
Name two areas with which the cavity of the middle ear communicates:
Mastoid Antrum
Nasopharynx
Within which part of the temporal bone do the middle and inner ear lie?
Petrous Part
The inner ear consists of a series of bone lined chambers called the
Bony Lbaryinth
Inside the bony labyrinth lies a series of membranous chambers called the
Membranous Labryinthe
What is the fluid that lies within the bony labyrinth?
Perilymph
What is the fluid that lies within the membranous labyrinth?
Endolymph
What is the function of the cochlea and the semicircular canals?
Changes sound waves into nerve signals and semicircular canals sense balance and posture to assist in equilibrium.
Through which foramen does the facial nerve exit the posterior cranial fossa?
Internal Acoustic Meatus
whilst in the mid ear the facial nerve gives off
Chorda Tympani
Where do the efferent lymphatics from these jugular lymph trunks drain into:
on the right side?
Thoracic Duct
Where do the efferent lymphatics from these jugular lymph trunks drain into:
on the left side
right lymphatic duct
Parotid nodes drain lymph from
Scalp around parotid gland, lateral parts of the eyelids, and middle ear.
Buccal nodes drain lymph from
Cheek region
Submental lymph nodes drain lymph from
Anterior tongue tip, central part of the floor of the mouth and chin
Submandibular lymph nodes drain lymph from
Front of scalp, nose, lips, air sinuses – ethmoidal, frontal, maxillary; teeth, gums, anterior tongue, floor of the mouth; and efferent lymphatics from submental nodes
mastoid lymph nodes rain lymph from
Middle region of scalp and external auditory meatus
occipital lymph nodes drain lymph from
Back of the scalp
Superficial cervical lymph nodes are found where
along external jug vein
Retropharyngreal lymph nodes found where
between pharynx and vertebral bodies
laryngeal lymph nodes found where
cricothyroid lig
Superficial cervical lymph nodes drain lymph from
From parotid nodes, and the angle of the mandible, structures that lie at the junction between the neck, the face and the scalp
Retropharyngeal lymph nodes drain lymph from
nasopharynx, auditory tube, and the upper cervical vertebral column
Tracheal lymph nodes drain lymph from
Trachea and Thyroid Gland
Which bone forms the posterior boundary of the anterior cranial fossa?
Sphenoid
Where can cribriform plate of ethmoid and Crista Galli be found - where fossa
anterior
Which bone forms the anterior boundary of the middle cranial fossa?
sphenoid
Which bone forms the posterior border of the middle cranial fossa?
occipital
Which bone forms the anterior and which the posterior border of the posterior cranial fossa?
Anterior: Sphenoid Bone Posterior Squamous Part of Occipital
What structures pass through the small foramina of the skull?(foramen ovale)
Mandibular Nerve, Accessory Meningeal Artery, Emissary Vein, Lesser Petrosal Nerve
Which foramen in anterior cranial fossa and which structures through
Cribriform plate
Olfactory Nerve
Which Forman in middle cranial fossa and which structures through
Optic
- Optic nerve and Ophthalmic Artery
Sup Orbital Fissure
- Occulomotor Nerve and Trochlear Nerve
- V1 Opthalmic
- Abducens Nerve
- Ophthalmic Nerve
Foramen Rotundum
- Maxillary V2 of Trigem
Foramen Ovale
- Mandibular V3 of Trigem
Foramen Spinosum
- Mid meningeal artery
- mid meningeal vein
- meningeal branch V3
Foramen Lacerum
- greater petrosal nerve
Carotid canal
- internal carotid artery
Which foramen in posterior cranial fossa and which structures
Internal Acoustic Meatus
- Facial nerve
- Vestibulochlear Nerve
- Labryinthe Artery
Jugular Foramen
- Glossopharyngeal Nerve, Vagus Nerve, Spinal Accessory Nerve, Internal jugular vein, inferior petrosal sinus, sigmoid sinus and meningeal branches of ascending pharyngeal and occipital arteries.
Hypoglossal Foramen
- Hypoglossal Nerve
Foramen Magnum
- Medulla of brain, meninges, vertebral arteries, spinal accessory nerve (ascending), dural veins and ant + pos spinal arteries.
Identify a groove that begins just lateral to the foramen spinosum. What artery and its branches makes this groove?
Mid Meningeal artery
On this skull identify grooves that run laterally on both sides starting from the internal occipital protuberance.
These grooves are for the intracranial venous sinus called the
Transverse Sinus
Into which foramen does the groove for the sigmoid sinus lead?
Jugular Foramen
Which major vein emerges into the neck from this foramen? - jugular foramen
Jug Vein
Sella Turcica is deep depression in which fossa and houses what
Middle Cranial FOssa
Pituitary Gland
In the body of which cranial bone is the sella turcica found?
Sphenoid Bone
Identify the anterior and posterior clinoid processes on either side of the sella turcica, which give attachment to a fold of dura mater, t what?
Tentorium Cerebelli
On either side of the sella turcica is a groove for the
Cavernous Venous SInus
Which foramen lies immediately anterior to the groove for the cavernous sinus?
Orbital Fissure
On the internal surface of the skull cap here identify the groove in the midline made by the
Sup Sagittal Sinus
Identify and label the pterygoid plates and the pterygoid hamulus.
Which bone are they a part of?
Sphenoid Bone
What type of ossification occurs in:
flat bones of the vault of the skull?
Intramembranous
What type of ossification occurs in:irregular bones of the base of the skull?
endochondral
When do posterior fontanelles fuse
2-3 months
Trachea begins from
C6
Cornea epithelium
Strat Squamous Non Keratinised
Name of cornea membrane
Bowman’s Membrane
Any blood vessels in cornea
No
Descemet’s layer is found where
Cornea
How many layers of endothelium in cornea
1
Where is maximum visual acuity in retina
Fovea Centralis
Layer 1 of Tear film is
Mucinous 30%
Layer 2 of Tear Film is
Aqueous 69%
Layer 3 of Tear Film is
Oily <1%
The anterior tonsils pillar is formed by the
palatoglossus muscle
posterior tonsils pillar is formed by
palatopharyngeus muscle
The tooth has three layers
Outer Enamel
Middle Dentine
Innermost pulp
Which of the following is NOT a border of the anterior triangle?
Select one:
a. sagittal line down the midline of the neck
b. Anterior border of the sternocleidomastoid muscle
c. Lower border of the mandible
d. anterior border of the sternothyroid muscle
anterior border of the sternothyroid muscle
Which of the following form the FLOOR of the posterior triangle of the neck?
Select one:
a. Pretracheal fascia
b. Investing layer of deep cervical fascia
c. Prevertebral fascia
d. Carotid sheath
prevertebral fascia
Which of the following is surrounded by the investing layer of the deep cervical fascia? Select one: a. Sternothyroid b. Sternocleidomastoid c. Latissimus dorsi d. Platysma
SCM
Which important vascular structure bifurcates within the carotid triangle? Select one: a. Facial artery b. External Carotid artery c. Common Carotid artery d. Internal Jugular Vein e. Subclavian artery
CCA
Which potential space in the neck could allow for the tracking of pus into the posterior mediastinum? Select one: a. Retropharyngeal b. Visceral c. Parapharyngeal d. Submandibular
Retropharyngeal
The isthmus of the thyroid gland is related which of the following structures?
Select one:
a. Tracheal cartilaginous rings
b. Cricoid cartilage
c. Hypoid bone
d. Thyroid cartilage
Tracheal cartilaginous rings
Which of the following nerves traverse the posterior triangle? Select one: a. Hypoglossal nerves b. Glossopharyngeal nerve c. Vagus nerve d. Accessory nerve
Accessory Nerve
During an elective thyroidectomy surgery, the superior thyroid artery is ligated. Which nerve runs close to this artery?
Select one: a. Glossopharyngeal nerve b. External Laryngeal nerve c. Internal laryngeal nerve d. Recurrent laryngeal nerve Feedback
External Laryngeal nerve
Which of these is an infrahyoid muscle? Select one: a. Geniohyoid b. Myelohyoid c. Stylohyoid d. Sternohyoid e. Digastric
Sternohyoid
What is the collective action of the suprayhyoid muscles? Select one: a. Depression of the hyoiid bones b. Elevation of the hyoid bone c. Rotation of the hyoid bone
elevation of hyoid
Name the suture that separates the frontal from the parietal bone. Select one: a. Coronal b. Lambdoid c. Sagittal d. Metopic
coronal
The ear ossicles are found inside which of these?
Select one:
a. Mastoid part of the temporal bone
b. Petrous part of the temporal bone
c. The squamous part of the temporal bone
b. Petrous part of the temporal bone
The loose connective tissue layer is considered the danger area of the scalp because pus from this layer can track intracranially. Which veins are responsible for this? Select one: a. Internal Jugular vein b. Emissary veins c. Intracranial venous sinuses d. Retromandibular veins e. Collateral veins Feedback
emissary veins
Which of the following is NOT found within the parotid salivary gland? Select one: a. Facial nerve b. Superficial temporal artery c. Maxillary artery d. Facial artery e. External Carotid artery
facial artery
From which artery does the facial artery arise? Select one: a. External Carotid artery b. Superficial temporal artery c. Common Carotid artery d. Internal Carotid artery e. Maxillary artery
ECA
At what vertebral level does the larynx continue as the trachea? Select one: a. C6 b. C7 c. C5 d. C4
C6
The TMJ is a modified hinge joint with an articular cartilage disc within the joint. What type of cartilage is this disc formed from?
Select one:
a. Elastic cartilage
b. Fibroelastic cartilage
c. Fibrocartilage
d. Hylaine cartilage
Fibrocartilage
Which muscle causes protraction of the jaw?
Select one:
a. Medial Pterygpoid
b. Temporalis
c. Lateral pterygoid
d. Digastric
e. Masseter
Lateral Ptergoid
Sclera is what
opaque posterior 5/6 which gives attachment to muscles moving eyeball
Cornea is what
anterior 1/6 which is transparent
Ciliary body function
Suspends lens and produces aqueous humour
Iris function
Controls diameter of pupil/amount of light rays entering eyeball
Choroid Function
Supplies blood to outer retina
Retina function
has light sensitive rods and cones
aqueous humour is found
anterior segment of eye
vitreous humour is found
posterior segment of eye
what is the crystalline lens
transparent, crystalline biconvex structure suspended by zones from ciliary body. It can change shape
The ciliary body and suspensory ligaments in eye are present in lens
360 degrees
Aqueous Humour helps maintain
intraocular pressure
Vitreous humour helps cushion
cushion retina
Where is posterior chamber of eye
Behind iris but in front of lens
AP Length of Eyeball
24mm
AP Length of orbit
40mm
Conjunctiva does not cover
Cornea
The lacrimal gland of eye is situated in orbit
Laterally
Lacrimal gland nerve supply
parasympathetic from facial
Lacrimal gland ducts open into
Conjunctival sac
After draining into lacrimal sac where does tears drain into
Nasolacrimal duct on inferior meatus of nose
Intrinsic muscles of eye do what
control diameter and helps alter lens curvature
extrinsic muscles of eye do what
move eye
Name the intrinsic eye muscles
Ciliaris and Constrictor Pupillae by Parasymp
Dilator papillae by Sympathetic
Name the 6 extrinsic ocular muscles
Medial, Lat, Inferior and Superior rectus
Sup and Inferior Oblique
Recti muscles of eye arise from
Apex f orbit from annualar fibrous ring
The superior oblique muscles of eye arises from
roof of orbit posteriorly
the inferior oblique muscles of eye arises from
floor of orbit anteriorly
Superior oblique muscle of eye origin and insertion
Lesser wing of sphenoid
sclera pos
Inferior oblique muscle of eye origin and insertion
medial orbit floor
s
clear posterior
Levator Palapebrae Superioris insertion
Upper Eyelid
Recti Eye muscles insertion
Sclera anteriorly
Trochlear nerve supplies which eye muscles
Superior oblique
abducen nerve supplies which eye muscles
Lateral rectus
Occulomotor nerve synapses where
ciliary ganglion in orbit
what is largest branch of ophthalmic nerve
frontal branch
what is smallest branch of ophthalmic nerve
lacrimal division
The opthalmic artery is a large branch of the
ICA
The central retinal artery supplies
inner retina
short posterior ciliary arteries supply
posterior chorid and outer retina
Long posterior ciliary ratios supply
Ant Choroid Ciliary Body and Iris
The superior and inferior ophthalmic veins drain into
Cavernous Sinus
When the eye is adducted what does obliques do
elevate/depress
when the eye is abducted what do recti do
elevate/depress
what is estotropia
manifest convergent squint
what is exotropia
manifest divergent squint
what happens with increased illumination to eyes
parasympathetic > both pupils constrict
what happens with decreased illumination to eyes
sympathetic = pupils dilate
where is constrictor papillae found
iris at pupillary border
ciliaris and constrictor papillae are innervated by
parasympathetic
dilator pupillae is innervated by
sympathetic
What is Amblyopia
Lazy eye
Action of medial rectus of eye
adduction
action of lateral rectus of eye
abduction
action of superior rectus of eye
elevation, adduction, intrusion
action of inferior rectus of eye
depression, adduction, extorsion
action of superior oblique of eye
intorsion, depression, abduction
action of inferior oblique of eye
extorsion, elevation, abduction
What is intorsion of eye
top of eyeball rotates towards nose
what is extrusion of eye
top of eyeball rotates away from nose
What forms lens in eye
ectoderm
optic vesicles grow outwards from what towards surface ectoderm
diencephalic part of neural tube
The eye develops from the
neural tube