Neuroanat Practical Topic List Two.

Front 1

2.1 Blood Supply of Spinal Cord & Brainstem

Back 1

Art of Spinal Cord
3 A, reinforced by segment a outside the VertCol enter via intervertebral for = Vasocorona

Vertebral Artery
Post Spinal a (x2) [or from PICA]
desc on post surf of SC, close to nerve roots, supply post 1/3,

Ant Spinal a
union of 2a @ F.Magnum; run in Ant Med Fissure

Segmental a
frm VertA, Asc Cervical a (of Inf Thry a) in neck Intercostal a in Thorax (Aorta)
Lumbar, Iliolumbar & Lat Sacral A in abd & pelvis
All give rise to Ant & Post Radicular a acc. A&P Nroots

Grt Ant Medullary a of Adamkiewicz (Grt Radicular a)
frm Aorta in lwr Thor, upr Lumb, unilat (usually ent LHS)

Front 2

2.1 Blood Supply of Spinal Cord & Brainstem

Back 2

Veins of the SC

drain into 6 tortuous long. channels w/in Pia Mater that comm sup w/veins of Brain & Venous Sinuses
emerge frm Ant Med Fissure (mostly)
lgest in Lumbar

Drain into Internal Ver Venous Plexus
1. Med Long V - 1x ant to AMF; 1x pst to Post Sulcus of C
2 Lat Long V - x4 bhd nerve roots
near base of skull unite and form trunks
end in Inf Cerebellar V or Inf Petrosal Sinuses

Front 3

2.1 Blood Supply of Spinal Cord & Brainstem

Back 3

Arteries of Brainstem

Midbrain
Post Cerebral
Sup Cerebral
Basilar

Pons
Basilar
Ant-Inf Cerebellar
Sup Cerebellar

MO
Verebral
Ant & Post Spinal
PICA
Basilar

Veins
Midbrain: open into Basal or Great Cerebellar V
Pons: open Basal V, Cerebellar V or neighb. Venous S.
MO: open Spinal V & neighb Venous Sinsuses

Front 4

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 4

Internal Carotid A
ent cranium via carotid canal of temp love; lies in carotid sinus as Carotid Siphon

Supplies tribs
dura, hypophysis, tympanic cav, trigem ggl
Dir
optic n & chiasm, hypothal, genu of int caps

Branches
1. Opthalmic a
> central a of Retina

2. Post Communicating a
> Optic Ch & Tr, Hypoth, Subthal, ant half of Vent Thal
site of berry anuerisms (rupt=stroke)

Front 5

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

ICA cont

Back 5

3. Ant Choroidal a
> ChorPl, Hippoc, Amygdala, Optic Tr, LGB, GlobPall, post limb of int caps

4. Ant Cerebral a
term biforc of IVC
>Med surf of Fro & Par Lobes, Corpus Callosum, Lentiform Nu, ant limb of Int Caps (Medial Striate a of Heubner), Paracentral Lobule

5. Ant Communicating A
cxn two hemisp

6. Mid Cerebral a
begin @ biforc of IVC
> Lat convex of hemisph, Insula, Trunk, arm & face M&S cortices, Broca & Wernicke Speech, CaudNu, Putamen, GlobPall, A&P limbs of IntCaps (via lateral striate a)

Front 6

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

ICA cont

Back 6

Ant Cerebral a
A1: Medial Lenticulostriate a > CaudNu & ant limb InC
A2: Recurrent a of Heubner > IntCaps; Orbitofrontal & Frontopolar a
A3: Pericollosal a; term br ext post > Int Parietal (S&I) and Precuneal a > Callosal Marginal a
A4 + 5: Callosal art (supracallosal a)

Front 7

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

ICA cont

Back 7

Middle Cerebral a
M1: Horizontal/Sphenoidal segment > Basal Ggl

M2: Sylvian/Insular segm >

M3: Opercular Segm > frm Insula to Cortex

M4: Terminal/Cortical Segm > irrigate Cortex

Front 8

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 8

Vertebral A
Ant Spinal
Post Spinal
PICA
> dorlat zone of Medulla, Inf Surf of Cerebellum, ChorPl of 4V, Med & Lat CN8 Nu, Inf Cereb Ped, Nu Ambiguus, intraaxial fib of CN 9&10, Spinothalmic Tr, Spinal Trigm Nu & Tr

Front 9

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 9

Basilar Artery
formed by union of 2 Vertebral A

1. Pontine a
Corticospinal Tr, CN6 fiber

2. Labyrinthine a
cochlea & vestib apparatus
dir 15%

3. Ant-Inf Cerebellar a (AICA)
Labyr. 85%
Inf Surf of Cerebellum, CN7 & intr fib, Spinal Trigem Nu&Tr, Spinothalmic Tr, Inf&Mid Cereb Ped, Hypothalamospinal Tr

4. Sup Cerebellar A
sup surf of Cerebellum & Dentate Nu

5. Post Cerebra A
biforc of Basilar a > Midbrain
post half of Thal, MGB, LGB, OccL, Vis Cortex, HippocF & inf surf ot TempL

4.

Front 10

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 10

Arterial Circle of Willis
1. Ant Comm a
2. Ant Cerebral a
3. ICA
4. Post Comm a
5. Post Cerbral a

penetrating br to Ventral Dienc & Midbrain

Front 11

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 11

Meningeal Arteries
>intracranial dura frm br of Ext Carotid a

1. Ant Mening a
dura of ACF

2. Mid Mening a
br of Max a (auriculotemp a hooks arnd)
ent via f.spinosum
periosteal & meningeal dura belw Temp & ParieL

3. Post Mening a
asc Pharyng, Vert, Occip
dura of PCF

Front 12

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 12

Veins of the Brain
no valves
frm cortex & subcort subst > term in dural sinsuses

Superficial Cerebral v
< Sup. Sagital Sinus

Deep Cerebral V
septal area, thal basal ggl
1. Internal CV
< septal, thalamostriatal [X: venous angle @ F.Monro], terminal V,

2. Grt Cerebral V of Galen
< int cerbral v and > str. sinus

Front 13

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 13

Venous Dural Sinuses
1. Sup Sagittal Sinus
< f.Cecum to IntOccProtub < Sup Cerbr, Diploic, Parietal Emissary V, Arachnoid Grans > Rt Transv S

2. Inf Sagital Sinus
inf edge of falx cerebri; + Grt Cerebral V = #3

3. Straight Sinus
term @ IntOccProtub > Lt Transv

4. R & L Transverse Sinsus
< Temp & OccL

5. Confluence of Sinuses
union of 1-4

Front 14

2.2 Blood Supply of Cerebrum and Cerebellum: circulus arteriosus

Back 14

1. Sigmoid Sinus
cont of Transv S > pass inf-med to into Jug For.
2. Occipital Sinsus
smest, in margin of falx cerebelli
< post int vert plexus > Confl of S
3. Sphenoparietal Sinus
curve of lsr wing of Sphenoid b > Cavernous S
4. Sup Petrosal Sinsus
frm Cavern > Sigm
rec Pons, Medulla, C.bell & Inr Ear, S&I Opthalmic V
5. Cavernous Sinus
surr Sella turcica
cont w/in: ICA, Symp Plexus, CN 6
in lat wall: CN3, 4, V-I, V-3