Branches
|
Posterior Cerebral Artery |
Location |
Branches |
|
P1 |
Before PCOM origin |
PCOM anterior thalamoperforator (Tuberothalamic a) Posterior thalamoperforator
|
|
P2 |
After PCOM origin P2A: while in the crural cistern P2P: after bridging to ambient cistern |
Middle posterior choroidal artery Lateral posterior choroidal artery Thalamogeniculate
|
|
P3 |
Quadrigeminal cistern |
|
|
P4 |
Cortical branches |
Anterior & posterior temporal arteries Lateral occipital artery Medial occipital artery calcarine & parieto-occipital Splenial artery |
Occlusion Syndromes
|
Occluded artery |
Occlusion syndrome |
|
Anterior thalamoperforators (Pcom) |
Anterior thalamic syndrome (impaired memory, apathy), thalamic aphasia if dominant side (lexic-semantic errors, sematic paraphasia)
|
|
Posterior thalamoperforators (P1) |
Paramedian thalamic triad (altered mentation ‘RAS’, impaired memory ‘medial nucleus’, vertical gaze palsy ‘pretectal’) – apathy, abulia
|
|
Thalamogeniculate (P2) |
Contralateral sensory loss (VPM/VPL nuclei) – hemianopia (LGB) – Dejerine-Roussy Syndrome
|
|
Posterior choroidal |
Variable, usually posterior thalamic symptoms (hemisensory, hemianopia, memory impairment)
|
|
Medial occipital |
Hemianopia with macular sparing – alexia without agraphia if dominant side
|
|
Lateral occipital |
Prosopagnosia (if bilateral) – Balint (if bilateral) – hemispatial neglect (if dominant)
|
|
Splenial |
Prosopometamorphopsia (distorted faces) – tactile agnosia of left hand |
