The artery of Percheron (AOP) is an uncommon variant of the paramedian artery, a solitary trunk branching off from the posterior cerebral arteries, supplying both paramedian thalami, and also often the rostral midbrain and the anterior thalamus. The typical clinical manifestations of the AOP infarction include altered mental status, cognitive impairment, and oculomotor dysfunction. We report a rare case with AOP infarction, and the clinical characteristics and rehabilitation courses for alertness disorder, cognitive dysfunction, and other accompanied symptoms.
Anterior Thalamic Nuclei ; Arteries* ; Cognition ; Cognition Disorders ; Infarction* ; Mesencephalon ; Ophthalmoplegia ; Posterior Cerebral Artery ; Rehabilitation ; Thalamus

Complex regional pain syndrome (CRPS) type I in stroke patients is usually known to affect the hemiplegic upper limb. We report a case of CRPS presented in an ipsilesional arm of a 72-year-old female patient after an ischemic stroke at the left middle cerebral artery territory. Clinical signs such as painful range of motion and hyperalgesia of her left upper extremity, swollen left hand, and dystonic posture were suggestive of CRPS. A three-phase bone scintigraphy showed increased uptake in all phases in the ipsilesional arm. Diffusion tensor tractography showed significantly decreased fiber numbers of the corticospinal tract and the spinothalamic tract in both unaffected and affected hemispheres. Pain and range of motion of the left arm of the patient improved after oral steroids with a starting dose of 50 mg/day.
Aged ; Arm ; Complex Regional Pain Syndromes ; Diffusion ; Diffusion Tensor Imaging ; Female ; Hand ; Humans ; Hyperalgesia ; Middle Cerebral Artery ; Posture ; Pyramidal Tracts ; Radionuclide Imaging ; Range of Motion, Articular ; Spinothalamic Tracts ; Steroids ; Stroke ; Upper Extremity