Flashcards in Effects of Strokes Deck (23):
What arteries make up the anterior circulation?
- Middle Cerebral
- Anterior Cerebral
- Lateral Striate
Middle Cerebral Artery blockage prevents blood flow where?
- Motor Cortex for Upper Limb and Face
- Sensory Cortex for Upper Limb and Face
- Temporal Lobe (Wiernicke's area)
- Frontal Lobe (Broca's)
Symptoms of Middle Cerebral artery stroke
Contralateral paralysis in upper limb and face
Contralateral sensory loss in upper limb and face
Aphasia if in dominant hemisphere.
Anterior Cerebral artery blockage prevents blood flow where
Motor cortex- lower limb
Sensory cortex Lower limb
ACA stroke symptoms
Loss of motor and sensory in lower limb
Lateral Striate Artery supplies what
Striatum, internal capsule
Lateral striate artery stroke symptoms
Lateral striate artery strokes commonly occur when?
When HTN is unmanaged and you have lacunar infarcts.
Posterior Circulation made up by which arteries>
- Anterior Striate Artery
- Posterior Inferior Cerebellar Artery
- Anterior Inferior Cerebellar Artery
- Posterior Cerebellar Artery
Anterior Striate Artery supplies blood where
Lateral corticospinal tract
ASA stroke symptoms
contralateral hemiparesis- lower limbs
Ipsilateral hypoglossal dysfunction
ASA stroke commonly bilateral, called Medial medullary syndrome---
caused by the infarct of paramedian branches of ASA and vertebral arteries
PICA supplies blood where
Remember the PICA comes off of the vertebral arteries pretty low...supplies blood to the lateral medulla, so:
vestibular nuclei, lateral spinothalamic tract, spinal trigeminal, nucleus ambiguus, sympathetic fibers, inferior cerebellar peduncle
Symptoms of PICA bockage
Vomitting, vertigo, nystagmus,
Decreased pain and temp to face and limbs
What is Wallenburg's syndrome?
Lateral medullary syndrome-
Nucleus ambiguus effects are specific to what lesion?
PICA....Don't PICA Horse (hoarseness) that can't eat (dysphagia). Both a result of nucleus ambiguus
AICA supplies blood where
- cranial nerve nuclei
- vestibular nuclei
- facial nucleus
- spinal trigeminal nucleus
- cochlear nuclei
- sympathetic fibers
Facial nucleus effects are specific to what lesion?
Lateral Pontine Syndrome---AICA lesions
Facial droop means AICA's pooped
PCA supplies blood where
PCA stroke symptoms
contralateral hemianopsia with macular sparing
Berry Aneurysms most commonly occur where?
At bifurcations in the Circle of Willis- most commonly at the bifurcation of the anterior comunicating artery.
Rupture of a berry aneurysm leads to
subarachnoid hemorrhage or hemorrhagic stroke
Berry aneurysms and the optic chiasm?
May compress the optic chiasm and lead to "bitemporal hemianopia"