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Flashcards in Neuroradiology Deck (218)
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1

Enlarged perivascular (virchow robin) spaces?

- Cryptococcus (gelatinous pseudocyts, do not enhance) - Mucopolysaccharidoses (hunters, Hurlers) - Atrophy VR don't contain CSF

2

Myelination pattern?

Progression: inferior to superior, posterior to anterior, central to peripheral Subcortical white matter is last to myelinate Brainstem and posterior limb of internal capsule are myelinated at 36 weeks

3

Corpus Callosum Development?

Front to back (but the rostrum is last)

4

Immature Myelin Appearance?

Higher water content- brighter on T2 and darker on T1 Mature myelin- bright on T1 and T2 dark T1 (1 yo) changes proceed T2 changes (2yo)

5

Paranasal sinus formation?

Maxillary -> Ethmoid -> Sphenoid ->Frontal

6

Foramen Ovale

CN V3, accessory meningeal artery

7

Foramen Rotundum

CNV2 (R2V2)

8

Superior Orbital Fissure

CN 3,4, V1, and CN 6

9

Inferior orbital fissure

CN V2

10

Foramen Spinosum

Middle meningeal artery (spine contains meninges)

11

Jugular foramen

Jugular vein, CN 9, CN 10, CN 11

12

Hypoglossal canal

CN12

13

Optic canal

CN 2 and opthalmic artery

14

What runs in the cavernous sinus

CN 3, 4, V1, V2, CN 6 (CN 2 and CN V3- do not run in)

15

What nerve is adjacent to the carotid artery in the cavernous sinus and is not within the wall?

CN6

16

Branches of external carotid?

Some administrators like fucking over poor medical students Superior thyroid Ascending pharyngeal Lingual Facial Occipital Posterior Auricular Maxillary Superficial temporal

17

Internal Carotid Artery Branches?

C2- petrous C3 - Lacerum C4- Cavernous (site of CC fistulas) C5- Clinoid ( aneurysm can compress the optic nerve at this level) C6-Ophthalmic (origin at the dural ring- intrdural) C7- Communicating terminal (aneurysm can cause CN III palsy)

18

Fetal PCA?

PCOM is as large or bigger then the P1 segment PCOM is superior and lateral to CN 3 (as opposed to superior and medial in normal anatomy)

19

Deep Cerebral Veins

Basal Vein of Rosenthal Vein of Galen Inferior Petrosal Sinus

20

Superficial Cerebral Veins

Vein of Trolard (drains into superior sagittal sinus) Vein of Labbe (drains into the transverse sinus) Superficial Middle Cerebral Veins Superior Cerebral Veins

21

CN III Palsy

Terminal Aneurysm Aneurysm of the PComm Artery

22

CN 6 palsy

Increased intracranial pressure

23

Intacranial hypotension

Sagging of midbrain meningeal enhancement distension of dural venous sinuses

24

Intracranial Hypertension

Empty Sella Optic Hydrops Papilledema

25

Vasogenic Edema

Extracellular

26

Cytotoxic edema

Intracellular Na/K pump

27

Hydrocephalus

Obstructive: Non-communicating- involves the ventricular system Communicating-Involves the villi/arachnodi granulations Non-obstructive: Increased production of CSF- choroid plexus papilloma

28

Transtentorial Herniation

Effaces ipsilateral suprasellar cistern first Duret hemorrhage from basilar artery perforators

29

Multiple Sclerosis

- Relapsing and remitting is most common type - Acute plaques should restrict diffusion - Tumefactive- incomplete ring enhancement Marburg- childhood variant, fulminant, rapid demise

30

ADEM

Post-viral/vaccination T2 bright lesions, which enhance in a nodular/ring like fashion Typically don't involve the collosal septal interface