Search results for "Fourth Ventricle"
showing 5 items of 15 documents
Neurosurgery of Malignant Brain Tumors
1987
To Virchow 167 belongs the credit of identifying as tumors, tissue changes already described in the brain, and at the same time to have published an account of the characteristics of the gliomas and the first classification of the various types. It was only the knowledge of the neoplastic nature of the gliomas 127 which made possible surgical action with the aim of extirpation (Fig. 1), when at the end of the 19th century the stormy development of surgery in other parts of the body was being practised successfully 162. The first reports about the removal of an intracerebral space-occupying lesion came from Wernicke and Hahn (1881)183 and also from Bennett and Godley (1884)16. In both cases …
Computed Tomography in Brain Tumors
1981
Craniocerebral injury and brain tumor are the two most important indications for CT studies. There is unanimous agreement that computed tomography is unequalled in its diagnostic accuracy in demonstration of intracranial tumors. Our own experience is based on observations in 3,750 patients with brain tumors or cerebral metastases who were studied in the period from December 1974 to March 1980 (Table 1). Initial CT studies demonstrated the intracranial tumor or tumors in 3,589 cases (95.7%). Several CT examinations were necessary for diagnosis of a brain tumor in 112 patients (3.0%). Other diagnostic procedures or postmortem studies revealed a brain tumor which had not been demonstrated with…
OC2.01: Examination of the fetal brain by three-dimensional ultrasound: potential for routine neurosonographic studies
2005
Objective: To evaluate the role of three-dimensional (3D) ultrasound in the assessment of the fetal brain and its potential for routine neurosonographic studies. Methods: We studied prospectively 202 consecutive brain fetuses between 16 and 24 weeks’ gestation. A 3D-ultrasound volume of the fetal head was acquired transabdominally. The entire brain anatomy was later analyzed by a sonologist expert in neonatal cranial sonography using the multiplanar images. The quality of the conventional planes obtained (coronal, sagittal and axial, at different levels) and the ability to visualize properly the major brain anatomic structures were evaluated. Results: Acceptable rendered cerebral volumes we…
Effekt der kontralateralen Stimulation auf evozierte otoakustische Emissionen bei akutem Hörverlust*
1994
23 patients with unilateral hearing loss and presence of TEOAE on both ears were examined with regard to the association between contralateral acoustic stimulation and evoked otoacoustic emissions. Contralateral white noise of 40 dB HL, 50 dB HL and 60 dB HL decreases the amplitude of TEOAE both at the ear with and without hearing loss. In comparison with a group of subjects with normal hearing, the decrease in the amplitude of TEOAE was less in the group of patients with hearing loss. Two paradoxical cases were found with an increase in the TEOAE amplitude in the ear with hearing loss during contralateral stimulation. It is assumed that impairment of the efferent synapses on the outer hair…
Neuropathology of Cerebellar Infarction: Its Morphology in Comparison to Selective Postmortem Angiography of Cerebellar Arteries
1994
A typology of infarctions [11, 20] is established for the cerebral hemispheres and has recently also been used, chiefly in neuroradiological diagnosis, for cerebellar infarctions [2–5, 8, 10, 16]. Detailed clinical [12] and microangiographic [7, 9, 13, 15, 17] investigations of the vascularization of the posterior cranial fossa can be referred to in this context. With the aid of selective postmortem angiograms we examined the territories of the superior cerebellar artery (SCA), anterior inferior cerebellar artery (AICA), and posterior inferior cerebellar artery (PICA) on serial sections in the three planes of projection. The sagittal plane offers decisive advantages for assigning cerebellar…