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73 Cards in this Set

  • Front
  • Back
ACA SUPPLIES
medial and dorsal aspect of the frontal and parietal lobes
precentral&postcentral gyrus
Occlusion of ACA results in
CONTRALATERAL PARALYSIS IN THE LEG
OCCLUSION OF BOTH ACA prod bilateral paraylsis in lower limbs
ischemia to the postcentral
results impaired sensation to the leg
MCA SUPPLIES
Precentral gyrus, premotor region, somesthetic and auditory areas
parietal area
MCA Occlusion
DAMAGE TO THE UPPER EXT. AND FACE CONTRALATERALY
LENTICULOSTRIATE ART
can cause a lacunar stroke
PCA SUPPLIES
MIDBRAIN, THALAMUS, SUBTHALAMIC NUCLEUS
TEMPORAL AND INF OCCIPITAL LOBES OF THE CORTEX
Branches of the PCA
ant and post temporal
parieto-occipital
Calcarine artery supplies
primary visual cortex
lesion of the calcarine artery
hemianopsia
PCA lesion
midbrain infarction
unilateral damage to the ventral region causes Weber's
Sup Cerebellar artery supplies
rostral pons,caudal midbrain, superior cerebellum
Lesion of the SCA
IPSI LIMB AND GAIT ATAXIA DUE TO DAMAGE TO THE SUP CEREBELLAR PEDUNCLE AND CEREBELLAR EFFERENTS
Lesion of the SCA
Contra loss of sensation of pain and temp due to damage to the spinothalamic tract
Lesion of the SCA
Ipsi Horner's syndrome due to damage of descending sympathetic pathways supplying the eye
Lesion of the SCA
analgesia & thermoanesthesia on the ipsi face due to damage of the nucleus & spinal tract of the trigeminal nerve
Pontine paramedian arteries arise from the
Basilar artery
Pontine Paramedian arteries supply
medial portion of the upper and lower pons
Pontine Paramdian a occulison
contra UMN paralysis dut to involvement of the corticospinal tract
Pontine Paramedian a. occlusion
ipsi facial weaknes due to damage of dorsal facial nucleus
Pontine Paramedian a. occlusion
ipsi gaze paresis due to damage to pontine gaze center & abducens nucleus
Short Circumferential a
branch off of the pontine
Short Circumferential a supplies
ventrolateral pons
descending sympathetic fibers from the hypothalamus
Short Circumferential a supplies
portions of the trigeminal and facial nucleus and their fibers
Short circumferential a occluisons
ipsi horners syndrome
contra hemianesthesia of the body due to damage to the spinothalamic tract
Long circumferential a
supplies
most of the tegmentum of the rostral & caudal pons
Long circum a supplies
lateral portions of the midbrain tegmentum
long circum a occluison
paresis of conjugate eye movements
Long circum a occlusion
nystagmus & contra hemianesthesia
AICA supplies
ventral surface of the cerebellum
AICA supplies
lateral portions of the caudal pons
AICA occlusions
ipsi los of fascial sensation due to damage to CNV
AICA occlusions
ipsi horners (due to disruption ofthe descending sympathetic fibers)
AICA occlusions
contra hemianesthesia due to damage of the spinothalamic tract
Anterior spinal supplies
medial medulla
ASA occlusions
medial medullary syndrome 1.contra loss of kinesthesia & discriminative touch (damage to medial lemniscus)
2. UMN paralysis (damage to pyramidal tract)
Medial medullary syndrom
3. Ipsi paralysis of tongue muscles (tongue deviates to side of lesion-Hypoglossal nucleus

• may affect fibers in CN XII & CST because the two structures are juxtaposed in medulla
• Anatomic basis for inferior or hypoglossal alternating hemiplegia
•Characterized by LMN paralysis of ipsi half of tongue, & contra hemiplegia
Posterior spinal a supplies
fasciculus gracilis & cuneatus
-spinal trigeminal nuclei
Posterior spinal artery supplies
dorsal and caudal inf cerebellar peduncle
-solitary tract and dorsal motor nucleus of X
Posterior spinal artery occlusions
loss in conscious proprioception of the ipsi body due to damage of nucleus cuneatus and gracilis
PICA arises from the
vertebral artery
PICA occlusion
Wallenberg's syndrome
PICA supplies
lateral medulla
-spinothalamic tract
-dorsal&ventral spinocerebellar tracts
PICA supplies
-descending sympathetic fibers
-descending tact of CN V nucleus
PICA supplies
nucleus ambiguus, portions of the vestibular nucleus
Clopidogrel (plavix)
block ADP formation & prevent or attenuate platelet aggregation
Asprin
causes and irreversible acetylation of the enzyme cyclooxygenase and inhibits thromboxane synthesis in platelets
reduction of thromboxane synthesis in platelets
results in reduced release of this prostaglandin leading to prevention or reduction of platelet aggregation
Tirofiban (Aggrastat)
blocks GP IIb/IIIa receptors on the platelets and prevents their aggregation
GP receptors
located on platelet membrane, bind fibrinogen and other molecules and promote clot formation
Thrombolytic drugs
lyse blood clots and have had success in reversing neurological deficits in patients with stroke if given within a critical time window of onset of symptoms
Wallenburg syndrome
caused by damage to the PICA
Wallenburg clinical manifestations
dysphagia, dysarthria
analgesia & thermoanesthesia on the ipsi side of the face due to damage to nucleus and spinal tract of trigeminal nerve
Wallenburg clinical manifestations
contra loss of P &T due to damage to the spinothalamic tract
Wallenburg clinical manifestations
vertigo,nausea, vomiting, nystagmus due to damage to portions of the vestibular nuclei
Wallenburg clinical manifestations
ipsi horners syndrome
Wallenburg clinical manifestations
ipsi gait & limb ataxia due to damage to cerebellum/inf cerebellar peduncle
Horners syndrome caused by
SCA, AICA, PICA, short circum
Horners symptoms
miosis, ptosi, anhydrosis, conjuctival congestion
Benedikt syndrom
lesion of the ventral and tegmental midbrain
Benedikt syndrome caused by
damage to ventral and tegmental midbrain
Benedikt syndrome charact
ipsi oculumotor paresis due to damage to the oculolomotor nucleus
Benedikt syndrome charact
contra limb ataxia due to damage to the red nucleus and sup cerebellar ped
Parinaud syndrome
AKA aqueduct of sylvius or midbrain syndrome
Parinaud syndrome caused by
dorsal midbrain lesion
most common: pineal region tumors and hydrocephalus
Perinaud syndrome charact.
impaired upward vertical gaze and loss of pupillary light reflex due to damage to pretectal area
cause setting sun
Claude syndrome caused by
unilateral damage to the tegmental region of the midbrain
Clinical manif. of Claude syndrome
ipsi oculomotor paresis due to damage to the oculomotor nucleus and CONTRA ataxia & tremor due to damage to the sup cerebellar peduncle
Weber's syndrome causes
unilateral damage to the ventral midbrain
Weber's syndrome
involves the PCA
Weber's syndrome charact.
IPSI PARESIS OF ADDUCTION AND VERTICAL GAZE
Weber's syndrome charact.
PUPILLARY DIALATION DUE TO DAMAGE TO THE OCULOMOTOR NERVE
Weber's syndrome charact.
PARESIS OF CONTRA FACE, ARM, AND LEG DUE TO DAMAGE OF THE CORTICOBULBAR AND CORTICOSPINAL TRACTS