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55 Cards in this Set

  • Front
  • Back
The structures that pass the optic foramen are the
Optic nerve and CRA (ophthalmic A)
Superior orbital fissureInside tendinus annulusAka Oculomotor foramenOutside tendinus annulus(above annulus)
Old Owls Are Not IntelligentOM nerve (IIIs), sup divisionOM nerve (IIIi), inf divisionAbducens N (VI)Nasociliary N (V1)Inferior ophthalmic veinRob Left Florida To SingRecurrent lacrimal ALacrimal N (V1)Frontal N (V1)Trochlear N(IV)Superior ophthalmic vein
Foramen rotundum
Maxillary N
Foramen ovale
Mandibular N (V3)Accessory meningeal ALesser petrosal N
Foramen spinosum
Middle meningeal A & NMeningeal branch of V3
Formane lacerum
Internal carotid AInternal carotid N plexus
Internal acoustic meatus
Facial N (VII)Vestibulocochlear N (VIII)
Jugular foramen
Inf. Petrosal sinusGlossopharyngeal N (IX)Vagus N (X)Accessory N (XI)Sigmoid sinusPost meningeal A
Hypoglossal canal
Hypoglossal N (XII)
Foramen magnum
Medulla oblongataMeningesVertebral AMeningeal branch of vertebralsSpinal roots of accessory N
The only synovial joint of the skull is the
Temporomandibular joint (TMJ)
Branches of the external carotids
Facial AInfraorbital ASuperficial temporal A. Transverse facial A Orbital A Frontal A
Branches of the internal carotids
Ophthalmic APosterior communicating AAnterior cerebral AMiddle cerebral A
The circle of Willis consists of
Internal carotid AsCerebral AsCommunicating As
The R and L brachiocephalic veins drain to the
Superior vena cava
The brachiocephalic veins are formed by the
Union of the internal jugular and subclavian veins
The external jugular vein drains the
The internal jugular vein drains the
Orbit and head
The supravaginal space of Schwalbe is found
Around the ON between limiting membrane and dura
Volume of the orbital cavity is
The orbit consists of 7 bones
Maxillary (facial) – floor and medial wall Zygomatic (facial) – lateral wall and floorPalatine (facial) – floorLacrimal (facial) – medial wallFrontal (cranial) – roof Sphenoid (cranial) – lateral wall, floor and medial wall Ethmoid (cranial) – medial wall (lamina papyracea)
CN V > ophthalmic div > Frontal branch >
Supratrochlear and Surpaorbital
CN V > ophthalmic div > Lacrimal branch >
Superior div (lateral palpebral branch) , Inferior div
CN V > ophthalmic div > Nasociliary branch >
Porterior and anterior ethmoidal branches, Infratrochlear branch, sensory root and long posterior ciliary nerve
The terminal branches of the ophthalmic A are the
Frontal A (aka supratrochlear A), Dorsal nasal A
Branches of the external carotid artery Facial A.Superficial Temporal A.Internal maxillary A.
> branches to angular A. > supplies side of face and eyelids> infraorbital A, orbital branch of middle meningeal A. (aka recurrent meningeal A) > provides collateral circulation to the orbit
The ophthalmic A is the
7th branch of the internal carotid
Central retinal A is the 1st branch of the Ophthalmic A.
Enters the orbit in the center of the optic nerve
Lacrimal A. is the 2nd branch of the ophthalmic A Recurrent meningeal AMuscular AZygomatic ASuperior and inferior lateral palpebral A
There are 4 branches of the lacrimal A Aka recurrent lacrimal A – enters through the SOFSupplies SR and LRZygomaticofacial and Zygomaticotemporal
Superior muscular A supplies (direct brn of ophthalmic)
SR, SO and levator
Inferior muscular A supplies (direct brn of ophthalmic)
IR, IO and MR
Posterior ciliary As branch off the ophthalmic A and
Form the Circle of Zinn Haller around the optic nerve
The Pial artery is a branch of the ophthalmic A and
Vasculaizes the pia mater of the optic nerve
Supraorbital A branched off the ophthalmic A –supplies
Orbit roof, frontal sinuses, eye brows, SR and levator, scalp
Anterior and posterior ethmoidal As are both branches
Of the ophthalmic A
Dorsal nasal A anastomoses with
The angular branch of the fracial A
Veins DO NOT have valves which allows for
Bidirectinal blood flow
Superior ophthalmic vein (SOV) Frontal drainage routeBack drainage route
Anastomose with angular V via orbital V – To the cavernous sinus > inferior petrosal sinus > internal jugular > brachiocephalic > sup vena cava > r. atrium
Central retinal vein drains the
Retina – connects with SOV in posterior orbit
Vortex veins drain
A quadrant of the posterior eye to the SOV
Anterior ciliary vein drains the
Front part of the eyeball
Inferior orbital vein exits the orbit independently of the
SOV – leaves through the inf. orbital fissure to the pterygoid venous plexus in the inferior temporal fossa
IOV continues to the
> internal maxillary V > retromandibular V > external jugular V > subclavian > sup vena cava – drains the bottom of the orbit
Cavernous sinus is formed anteriorly by the
SOV and communicates posteriorly with the inferior and superior petrosal sinuses
Intracranial sinuses are lined with
Dura mater
Pterygoid venous plexus is located
Outside the cranium and is NOT lined with dura – mass of small veins found below the cavernous sinuses
Pterygoid venous plexus communicates to the
Cavernous sinus through emissary veins
There are NO lymph nodes of lymph vessels in the
CN IV (trochlear) innervates the
SO on the orbital side of the muscle
The only CN with origin on the dorsal surface of brain stem is the …
Trochlear N (CN IV)
Lesion of SO results in the eye moving
Up and In and extorting – head tilt away from lesion
CN V (Trigeminal N) originates from the
Ventrolateral surface of the pons
Divisions of CN V =
Ophthalmic, maxillary, mandibular
Preganglionic sympathetic cell bodies are located in the
Lateral horn of gray and leave the spinal cord through the ventral root
The internal carotid nerved gives rise to the
Sympathetic carotid plexus – from lateral branch Sympathetic cavernous plexus – from medial branch