ABSTRACT
The angiographic findings in eight patients having cerebral vein occlusion without dural sinus occlusion are presented. The role of other radiologic examinations is discussed. Occlusive disease involving the dural venous sinuses and/or cerebral veins is a more frequent cause of cerebral symptoms than is generally assumed. An increased awareness of the variable clinical and computed tomographic manifestations is recommended, with liberal recourse to more definitive angiography in suspected cases.
Subject(s)
Cerebral Infarction/diagnostic imaging , Adult , Angiography , Brain/blood supply , Child , Female , Humans , Infant , Male , Middle Aged , Phlebography , Tomography, X-Ray ComputedABSTRACT
Nine cases of nearly occluded internal carotid artery (ICA) origins, usually simulating total occlusion, are presented. Correct diagnosis is aided by an awareness of the possibility of near occlusion of the ICA origin and by careful study of selective common carotid angiography with a long imaging sequence and subtraction. Carotid endarterectomy is the operative procedure of choice, since there may be startling apparent increase in size of the arterial lumen distal to the surgical repair. Many cases reported previously as internal carotid artery occlusion with successful endarterectomy may actually have been severe stenoses.
Subject(s)
Carotid Artery Diseases/diagnostic imaging , Aged , Carotid Artery Diseases/surgery , Carotid Artery, Internal , Diagnosis, Differential , Endarterectomy , Female , Humans , Male , Middle Aged , RadiographyABSTRACT
A tecnhique of performing metrizamide myelography with the patient supine and using lateral C1-2 puncture is described. Some advantages of this technique are discussed, especially for thoracic myelography.
Subject(s)
Metrizamide/administration & dosage , Myelography/methods , Radiography, Thoracic/methods , Spinal Puncture/methods , Cervical Vertebrae , Humans , PostureABSTRACT
The effects of upper and lower motor neuron lesions on human skeletal muscles and muscle spindles were studied using histochemical and morphometric techniques. In the lower motor neuron lesions, the muscle fibers showed group atrophy, fiber type grouping and target fibers. The muscle spindle demonstrated thickening of the capsule, degeneration of the nuclear chain fibers, targeting and splitting of the bag fibers. In the upper motor neuron lesion, the muscles showed group atrophy with histochemical evidence of preferential type II fiber involvement. Histometrics, however, failed to demonstrate type II fiber atrophy but showed hypertrophy of type I fibers. The muscle spindles only showed increased number of intrafusal fibers.
