Lesions II medulla Flashcards
what are the syndromes associated with lesions to the medial pontine basis?
- dysarthria hemiparesis 2. ataxic hemiparesis
what are the syndromes associated with lesions to the medial pontine basis and tegmentum?
- foville’s syndrome 2. pontine wrong-way eyes syndrome 3. millard-gubler syndrome 4. regions variably involved
what are the syndromes associated with lesions to the lateral caudal pons?
AICA syndrome
what are the syndromes associated with lesions to the dorsolateral rostral pons?
superior cerebellar artery syndrome
what are the syndromes associated with lesions to the medial medulla?
medial medullary syndrome
what are the syndromes associated with lesions to the lateral medulla?
lateral medullary syndrome (Wallenburg)
what structures are involved in medial brainstem lesions?
- pyramidal tract (corticospinal) 2. medial lemniscus 3. CN 3 (pons), 6(caudal pons), 12 (medulla) 4. MLF
what structures are involved in lateral brainstem lesions?
- spinothalamic tract 2. spinal tract of V 3. CN 5, 7 (pons), 8 (pons / medulla), 9, 10 (medulla)
definition: alternating hemiplegia
- cranial nerve deficits on one side 2. descending long motor tract deficits on opposite side
what vessel would likely be occluded in dysarthria hemiparesis?
basilar artery - paramedian branches (ventral territory)
where is the lesion in dysarthria hemiparesis?
medial pontine basis
what structures are affected in dysarthria hemiparesis?
- corticonuclear tract (UMNs) 2. corticospinal tract (UMNs)
what vessel would likely be occluded in ataxic hemiparesis syndrome?
basilar artery - paramedian branches
what structures are affected in ataxic hemiparesis syndrome?
- corticonuclear tract (UMNs) 2. corticospinal tract (UMNs) 3. pontine nuclei and pontocerebellar fibers
where is the lesion in ataxic hemiparesis?
medial pontine basis
what vessel would likely be occluded in foville’s syndrome?
basilar artery - paramedian branches
what structures are affected in foville’s syndrome?
- corticonuclear tract 2. corticospinal tract 3. facial colliculus (LMNs) - abducens nucleus or PPRF, facial nerve root fascicles
where is the lesion foville’s syndrome?
medial pontine basis and tegementum
what vessel would likely be occluded in wrong-way eyes syndrome?
basilar artery - paramedian branches
what structures are affected in wrong-way eyes syndrome?
- corticonuclear tract 2. corticospinal tract 3. abducens nucleus or PPRF
where is the lesion in wrong-way eyes syndrome?
medial pontine basis and tegmentum
what vessel would likely be occluded in millard-gubler syndrome?
basilar artery - paramedian branches
what structures are affected in millard-gubler syndrome?
- corticonuclear tract 2. corticospinal tract 3. facial nerve fascicles (LMNs)
where is the lesion in millard-gubler syndrome?
medial pontine basis and tegmentum
what vessel would likely be occluded in variable regions of the brainstem?
basilar artery - paramedian branches
what structures are affected in the variable regions of the brainstem?
- medial lemniscus 2. medial longitudinal fasciculus (MLF)
where is the lesion in the variable regions of the brainstem?
medial pontine basis and tegmentum
what structures are affected in AICA syndrome?
- middle cerebellar peduncle 2. vestibular nuclei 3. trigeminal nucleus and tract 4. spinothalamic tract 5. descending sympathetic fibers
where is the lesion in AICA syndrome?
lateral caudal pons
what structures are affected in superior cerebellar artery syndrome?
superior cerebellar peduncle
where is the lesion in superior cerebellar artery syndrome?
dorsolateral rostral pons
what vessels(s) would likely be occluded in medial medullary syndrome?
- anterior spinal artery - paramedian branches 2. vertebral artery - paramedian branches
what structures are affected in medial medullary syndrome?
- corticospinal tract 2. hypoglossal nerve and nucleus (LMNs) 3. medial lemniscus
what vessels(s) would likely be occluded in lateral medullary syndrome (Wallenburg’s syndrome)?
- vertebral artery thrombosis 2. PICA thrombosis
what structures are affected in lateral medullary syndrome?
- inferior cerebellar peduncle 2. vestibular nuclei 3. spinothalamic tract 4. spinal tract and nucleus of V 5. descending sympathetic fibers 6. nucleus ambiguus 7. loss of vertical orientation
