Asunto(s)
Embolia/etiología , Neoplasias Cardíacas/complicaciones , Hemiplejía/etiología , Infarto del Miocardio/etiología , Mixoma/complicaciones , Enfermedades de la Retina/etiología , Ecocardiografía , Electroencefalografía , Atrios Cardíacos , Humanos , Embolia y Trombosis Intracraneal/etiología , Masculino , Persona de Mediana EdadRESUMEN
Fifteen patients with symptoms of an ischaemic lesion in the vertebrobasilar territory were investigated with respect to the presence of asterognosis and amyotrophy of the hand muscles. Stereognostic disturbances were noted in 4 patients with a medullary lesion and in two patients with brainstem syndromes of less defined level. The findings in these cases suggested a lesion of the medial lemniscus. Amyotrophy of the hand muscles was not seen in these patients. The absence of association of astereognosis and amyotrophy of the hand muscles in syndromes due to lower brainstem lesions supports the view that these symptoms, when occurring conjointly in foramen magnum tumours, originate from two different lesions and are caused by different mechanisms.
Asunto(s)
Agnosia/etiología , Atrofia Muscular/etiología , Insuficiencia Vertebrobasilar/complicaciones , Tronco Encefálico/irrigación sanguínea , Infarto Cerebral/complicaciones , Mano , Humanos , Bulbo Raquídeo/irrigación sanguínea , Puente/irrigación sanguínea , Síndrome , TactoRESUMEN
On the basis of six cases of a tumour at the spinocranial junction, the clinical symptomatology is discussed with special reference to the occurrence of astereognosis and amyotrophy of the hand muscles. Possible mechanisms underlying these symptoms are discussed. In the authors' opinion, the frequent association of these symptoms is explained by the association of two pathogenic mechanisms, i.e., compression of the posterior column or interference with the arterial blood flow to the medial lemniscus, leading to astereognosis, and interference with the venous blood flow, leading to amyotrophy of the hand muscles.
