Practice Qs Flashcards
Labryinthe branches from
AICA
What makes up the primary visual CTX?
The cingulate and parahippocampal gyri are located on the medial
aspect of the hemisphere and are parts of the limbic lobe. (p. 14, 15, 28-30)
The lingual gyrus is the lower bank of the calcarine sulcus; the upper (cuneus) and lower
banks of this sulcus are the location of the primary visual cortex.
Where is the precuneus located
medial aspect of parietal lobes
where is the angular gyrus located
inferior parietal lobule
The cingulate and parahippocampal gyri are located on the ____
aspect of the hemisphere and are parts of the ____ lobe. (
medial
limbic
on MRI, what part of the brain on the scan tells us we are midline
cerebral aqueduct
the ____ in about the lateral one-third of the precentral
gyrus above the lateral sulcus;
face
the hand and upper extremity in about its ____
middle third
and the trunk
and hip are located about its _____
medial third
_______________ are located in the anterior
paracentral gyrus
LE and foot
A lesion in area 44 (the pars opercularis) that spreads will affect …
the lower portions of
the precentral gyrus in which the face is represented.
what a serves the pre and post central gyrus?
M4
The uncus is a small elevation at the _____ and ____ aspect of the parahippocampal
gyrus a
rostal and medial
The P2 segment of the posterior cerebral artery gives rise to
thalamogeniculate
A 51-year-old man presents with visual field deficits in both eyes and a right-sided weakness of the upper and lower extremities. MRI shows a lesion in the optic tract that has spread into a structure located immediately adjacent to this tract. Based on its anatomical relationship, which of the following structures is most likely involved in a lesion spreading from the optic tract?
(A) Left basilar pons (B) Left crus cerebri (C) Left pyramid (D) Right crus cerebri (E) Right optic nerve
Optic tract lays on crus cerebri.
B. If damage to R optic tract -> L crus cerebri problem
Lesions of the left basilar pons and pyramid would result in a ….
R sided weakness
Sudden tonsillar herniation may compress the ____ and damage
respiratory and cardiac centers resulting in sudden death.
medulla
anterior border zone ischemia can cause loss
loss of motor and sensor from the LE Because the lower limb portion of the homunculus is on the medial portion of the frontal and parietal lobes,
damage to the posterior border zone
visual and language issues
ACA
A1: (Precommunicating segment) ICA to anterior communicating a.
A2: (Infracallosal segment) anterior communicating a. to where rostrum and genu of corpus callosum meet
A3: (Precallosal segment) arches around the genu of corpus callosum, ends when vessels turn caudal. Has 2 branches: pericallos and callos marg
A4: (Supracallosal) superior to corpus callosum
A5: (Postcallosal) caudal to corpus callosum
MCA
M1: (Sphenoidal or horizontal segment): ICA to the bifurcation at insula
M2: (Insular segment): bifurcation at insula to circular sulcus of insula (right angle turn)
M3: (Opercular segment): Circular sulcus of insula to external surface of Lateral Fissure
M4: (Cortical segment): On the cortex
PCA
P1: Basilar bifurcation to posterior communicating a.
P2: Posterior communicating a. to around the midbrain
P3: (Quadrigeminal segment) segment within the quadrigeminal cistern
P4: (Cortical segment)
Medulla BS
Anterior Spinal Artery supplies: pyramids, medial lemnisus , hypoglossal nucleas
Posterior Spinal Artery supplies
Fasciculus cuneatus
Fasciculus gracilis
Cuneate and gracile nuclei
PICA supplies: Lateral medulla
Anterior inferior cerebellar artery supplies
Dorsal and ventral cochlear nuclei
Anteromedial branches of the basilar bifurcation and P1.
supplies what?
medial midbrain -> can cause webers syndrome
Quadrigeminal and superior cerebellar arteries
supply what
superior and inferior colliculo
Anterior choroidal artery supplies
Optic tract
Hippocampal formation
Internal capsule
An aneurysm in the following arteries can cause compression of the oculomotor nerve (CN III)
Posterior cerebral A
Superior cerebellar A
Posterior communicating A
An aneurysm in the following arteries can cause compression of the abducens nerve (CN VI)
AICA
labyrtinthe
An aberration of the following vessel can compress the trigeminal nerve (CN V) causing trigeminal neuralgia.
Superior cerebellar A
Aberrant branches of the following artery can compress the facial nerve (CN VII).
Anterior inferior cerebellar A.
What do the posteiror spinal arteries supply
legs part of corticospinal tract
fasc gracilis and cuneatus
Anterior spinal A supply what?
everything else: dorsal and ventral horns
Gives off sulcal arteries
These “stair step” upwards – switching sides every time – and so if one of them is occluded only one side of the medulla will be affecte
_______ are white matter “highway routes for connection to the cerebral cortex.”
Cerebral peduncles
The __________- forms part of the floor of the 4th ventricle.
pontine tegmentum
Cauda equina = ________
group of axons projecting from the spinal cord.
Afferent sensory fibers (rootlets) enter the SC through the ______ sulcus, which is present along the entire length of the SC. It then travels through white matter called Lissauer’s tract to get to the_____
posterolateral sulcus substantia gelatinosa (grey matter that caps the posterior horn)
Lamina of gray matter:
Lamina I covers the substantia gelatinosa
Lamina II is the substantia gelatinosa
Lamina III through VI make up the posterior horn
Lamina VII is all of the intermediate horn (including Clarke’s nucleus) and part of the anterior horn
Lamina VIII makes up the interneuron zones of the anterior horn
Lamina IX makes up the motor neurons of the anterior horn
Lamina X is the zone of gray matter surrounding the central canal
filum terminale internum
conus medullaris -> S2
