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Clinical Study of Seven Patients with Infarction in Territories of the Anterior Inferior Cerebellar Artery.
Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association 2017 March
BACKGROUND: The prominent features of anterior inferior cerebellar artery (AICA) infarction are vertigo, cerebellar ataxia, and impaired hearing. The present study investigated neurological characteristics associated with AICA infarction.
MATERIALS AND METHODS: The locations of infarcts in 7 patients (age, 32-72 years) with AICA infarction were divided into the lower lateral pons, the middle cerebellar peduncle (MCP), and the cerebellum.
RESULTS: Ischemic lesions were located in the MCP in 6 patients, spread to the lower lateral pons in 3, and involved the cerebellum in 4 patients. Standing posture and gait were impaired in all patients. Five and 4 patients had impaired hearing and vertigo, respectively. Two patients had only symptoms of labyrinthine disease, and 1 had these symptoms accompanied by impaired hearing. The symptoms in 2 patients with the lesion in the lateral pons were consistent with those in Gasperini syndrome. Two of 3 patients without vertigo had ataxia of the extremities. Stenosis of the vertebral artery or basilar artery in 5 patients indicated that the etiology was branch atheromatous disease.
CONCLUSIONS: The most prominent symptom of truncal and gait ataxia and the frequent association between vertigo and impaired hearing were consistent with the characteristics of AICA infarction. Two patients without vertigo had ataxia of the trunk and extremities that might have been due to involvement of the dorsal spinocerebellar tract in the inferior cerebellar peduncle.
MATERIALS AND METHODS: The locations of infarcts in 7 patients (age, 32-72 years) with AICA infarction were divided into the lower lateral pons, the middle cerebellar peduncle (MCP), and the cerebellum.
RESULTS: Ischemic lesions were located in the MCP in 6 patients, spread to the lower lateral pons in 3, and involved the cerebellum in 4 patients. Standing posture and gait were impaired in all patients. Five and 4 patients had impaired hearing and vertigo, respectively. Two patients had only symptoms of labyrinthine disease, and 1 had these symptoms accompanied by impaired hearing. The symptoms in 2 patients with the lesion in the lateral pons were consistent with those in Gasperini syndrome. Two of 3 patients without vertigo had ataxia of the extremities. Stenosis of the vertebral artery or basilar artery in 5 patients indicated that the etiology was branch atheromatous disease.
CONCLUSIONS: The most prominent symptom of truncal and gait ataxia and the frequent association between vertigo and impaired hearing were consistent with the characteristics of AICA infarction. Two patients without vertigo had ataxia of the trunk and extremities that might have been due to involvement of the dorsal spinocerebellar tract in the inferior cerebellar peduncle.
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