Foramens and Cranial Nerves Flashcards
CN XII
Hypoglossal Nerve
Which CN is affected in case of tumor of nerve leading to progressive unilateral hearing loss and tinnitus
CN VIII
Which CN is affected in case of brainstem lesion or deep laceration of neck causing loss of taste on posterior 1/3 of tongue and loss of sensation on affected side of soft palate
CN IX
CN VI
Abducent Nerve
Stylomastoid foramen contains what nerve?
Facial Nerve (CN VII)
The Spinal Accessory Nerve (CN XI) passes through what structure?
Jugular Foramen
The foramen magnum has what passing thru it?
Spinal cord
____ contains middle meningeal artery and vein and meningeal branch of CN V3
Foramen spinosum
_____ contains medulla and meninges, vertebral arteries, CN XI, dural veins, and anterior and posterior spinal arteries
Foramen magnum
What cranial nerve is used in sensation around the eye?
CN V
Which CN is affected in case of laceration or contusion in parotid region leading to paralysis of facial muscles, eye remains open, angle of mouth droops, and forehead doesn’t wrinkle; in case of fracture of temporal bone leading to laceration or contusion in parotid region leading to paralysis of facial muscles, eye remains open, angle of mouth droops, and forehead doesn’t wrinkle along with associated involvement of cochlear nerve and chorda tympani, dry cornea, and loss of taste on anterior 2/3 of tongue; and in case of intracranial hematoma (stroke) causing forehead wrinkles because of bilateral innervation of frontalis muscle, otherwise paralysis of contralateral facial muscles
CN VII
____ contains CN IX, X, XI; superior bulb of internal jugular vein; inferior petrosal and sigmoid sinuses; and meningeal branches of ascending pharyngeal and occipital arteries
Jugular foramen
Cranial nerve (motor): ciliary muscles, sphincter pupillae, all extrinsic muscles of eye except those listed from CN IV and VI
Oculomotor (CN III)
Which CN is affected in case of stretching of nerve during its course around brainstem or fracture of orbit leading to inability to look down when eye is adducted
CN IV
The facial Nerve (CN VII) passes through what structure?
Stylomastoid foramen and Internal accoustic meatus
What passes thru the jugular foramen?
CN IX, X, XI and jugular vein/artery
Which CN is affected in case of direct trauma to orbit or eyeball/ fracture involving optic canal leading to loss of pupillary constriction or pressure on optic pathway, laceration or intracerebral clot in temporal, parietal or occipital lobes of brain causing visual field defects?
CN II
Cranial Nerve (motor): submandibular, sublingual, lacrimal, nasal and palatine glands; (Sensory): taste from anterior 2/3 of tongue, soft palate
Facial (CN VII) intermediate nerve
CN VIII
Vestibulocochlear Nerve
CN X
Vagus Nerve
____ contains deep petrosal nerve and some meningeal arterial branches and small veins
Foramen lacerum
Which CN is affected in case of injury to terminal branches (particularly CN V2) in roof of maxillary sinus; pathological processes affecting trigeminal ganglion leading to loss of pain and touch sensations; paraesthesia; masseter and temporalis muscles do not contract; deviation of mandible to side of lesion when mouth is opened
CN V
____ contains the nasal emissary vein in some people
Foramen cecum
CN III
Oculomotor Nerver
____ contain optic nerve (CN II) and ophthalmic arteries
Optic canals
Cranial Nerve (sensory): equilibrium, motion, and hearing
Vestibulocochlear (CN VIII)
The Oculomotor nerve (CN III) passes through what structure?
Superior Orbital Fissure
Landmark found at superior point of neurocranium, in middle with cranium oriented in anatomical plane (Frankfurt horizontal plane)
Vertex
The Vestibulocochlear Nerve (CN VIII) passes through what structure?
Internal Accoustic Meatus `
Cranial Nerve (sensory): vision
Optic (CN II)
What are the three segments of the trigeminal nerve?
V1: Opthalmic nerve
V2: Maxillary Nerve
V3: Mandibular Nerve
____ contains mastoid emissary vein from sigmoid sinus and meningeal branch of occipital artery
Mastoid foramen
What foramen does the carotid run over?
Foramen lacerum