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Martin H. Weiss

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Martin H. Weiss

✓ The author provides a brief history of the genesis of organized neurosurgery and, in particular, the formation and evolution of the American Association of Neurological Surgeons. The legacy of neurosurgery is noted and the author discusses the present and future practice of neurosurgery.

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Martin H. Weiss and Frank E. Nulsen

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Martin H. Weiss and John A. Jane

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Martin H. Weiss and Uros Roessmann

✓ Hydrocephalic animals were given an intraventricular infusion of radioactive colloidal gold and then sacrificed up to 7 weeks after infusion. Histological evaluation revealed progression from a marked hemorrhagic necrosis of choroid plexus vessels and stroma to eventual replacement by fibrous connective tissue, sclerosis, and fibrinous degeneration of stromal vessels. Particulate colloid was found engulfed in perivascular spaces in the subependymal periventricular tissues, but there was no evidence of vascular damage, gliosis, or demyelination. These findings may play a role in decreasing cerebrospinal fluid production.

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William T. Couldwell and Martin H. Weiss

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Pituitary surgery

Martin H. Weiss

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Antibiotic neurotoxicity

Laboratory and clinical study

Martin H. Weiss, Theodore Kurze, and Frank E. Nulsen

✓ By ventriculocisternal perfusion, a series of newer antibiotics were circulated through the central nervous system to ascertain the potential toxicity of these drugs to the nervous parenchyma. Ampicillin, carbenicillin, gentamycin sulfate, and polymyxin B sulfate appear to be well tolerated whereas cephalexin monohydrate and penicillin G caused a repeated pattern of significant CSF pleocytosis, histological evidence of periventricular perivascular infiltrates, and evidence of clinical toxicity. A regime for treatment of central nervous system infections is presented, derived from the data presented above. Preliminary experience in a clinical series appears to support this program.