QUESTIONS AND ANSWERS | 100%
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Posterior Cerebral Artery (PCA) - 🧠 ANSWER ✔✔Arises from basilar.
Supplies Occipital Lobe , Midbrain, Thalamus, Pineal Gland, Choroid
Plexus, and Corpus Callosum
Symptoms of PCA Stroke - 🧠 ANSWER ✔✔-Contralateral Visual Field
Homonymous hemianopia
-Visual Agnosia (unable to interpret/recognize visual information)
- Weber's Syndrome (3rd nerve palsy + contralateral hemiplegia)
-Parinaud's Syndrome (Impaired upwards gaze, convergence-retraction
nystagmus, primary conjugate downward gaze)
,Anterior Inferior Cerebellar Artery (AICA) - 🧠 ANSWER ✔✔Feeds anterior
inferior parts of the cerebellum
Symptoms of AICA Stroke - 🧠 ANSWER ✔✔Lateral Pontine Syndrome:
vertigo, vomiting, nystagmus, falling towards the side of the lesion,
ipsilateral loss of sensation to the face, ipsilateral facial paralysis, ipsilateral
hearing loss
Posterior Inferior Cerebellar Artery (PICA) - 🧠 ANSWER ✔✔Feeds
cerebellum, superior section of the medulla,. Choroid plexus and fourth
ventricle
Symptoms of PICA Stroke - 🧠 ANSWER ✔✔Wallenburg Syndrome (lateral
Medullary Syndrome): Loss of pain and temperature sensation in the
contralateral trunk and ipsilateral face
Basilar Artery - 🧠 ANSWER ✔✔An artery, formed by the fusion of the
vertebral arteries, that supplies blood to the brainstem (medulla and pons)
and to the posterior cerebral arteries.
Symptoms of Basilar Artery Stoke - 🧠 ANSWER ✔✔Coma, quadriparesis,
ataxia, dysarthria, CN dysfunction and visual deficits, Locked in Syndrome,
Intranuclear Opthalmoplegia, gaze paresis, Millard Gulber Syndrome CN VI
,VII damage (diplopia facial weakness, loss of corneal reflex), Nausea,
vomiting, diplopia, gaze palsy, dysarthria,. vertigo, tinnitus, hemiparesis,
and quadriplegia.
Anterior Cerebral Artery (ACA) - 🧠 ANSWER ✔✔Feeds the media portion of
the frontal and parietal lobes as well as the corpus callosum
Symptoms of ACA Stroke - 🧠 ANSWER ✔✔Contralateral motor/sensory
deficits impacting legs > arms
Middle Cerebral Artery (MCA) - 🧠 ANSWER ✔✔Feeds majority of the
frontal, parietal, and temporal lobes, basal ganglia, internal capsule. It is
divided M1 - M4
Symptoms of MCA Stroke - 🧠 ANSWER ✔✔-Aphasia if dominant
hemisphere
-Neglect if non-dominant hemisphere
-Contralateral motor/sensory loss of face/arm/leg with Arms > Legs
-Anosognosia: neglect or lack of self awareness
Venous Vascular Anatomy - 🧠 ANSWER ✔✔Venous channels enter into
venous sinuses located in the Dura matter.
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, Superior Sagittal Sinus - 🧠 ANSWER ✔✔Travels posteriorly between the
cerebral hemispheres towards the occiput
Straight Sinus - 🧠 ANSWER ✔✔Travels along the tentorium, draining blood
from the superior cerebellar veins.
Transverse Sinus - 🧠 ANSWER ✔✔Travels along the base of the occiput
laterally and forwardly
Sigmoid Sinus - 🧠 ANSWER ✔✔Begins beneath the temporal bone and
travels to the jugular foramen where it becomes the internal jugular veins
Stroke Pathophysiology - 🧠 ANSWER ✔✔Arterial blood flow to the brain
tissue fails to meet metabolic demands resulting in cell damage or death.
ISCHEMIA FIRST THEN INFARCT.
Penumbra - 🧠 ANSWER ✔✔Zone surrounding the core infarct, damaged by
ischemia but not yet infarcted
---- functionally silent yet metabolically active
Hypoxia leading to Necrotic Pathway - 🧠 ANSWER ✔✔Cell energy failure