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M LeMay

Publications and source records attributed to M LeMay.

At least 37 records · Page 2Linked to original sources
PubMed1981

The paleopathology of an Aleutian mummy.

A multidisciplinary team examined an Aleutian mummy from the collection of the Peabody Museum of Archeology and Ethnology of Harvard University, Cambridge, Mass. The mummy, dating from the early 18th century, was of a middle-aged woman who had suffered from pulmonary and ear infections, atherosclerosis, pediculosis, and degenerative joint disease. Another finding was anthracosis, common in ancient bodies and related to indoor heating and cooking fires. Skeletal lead was not found, in contrast with the high levels seen in modern persons. No neoplasms were identified, again consistent with the results of previous studies of ancient human remains. Such comparisons of ancient and modern morbidity and mortality provide a historical perspective on the evolution and cause of human disease.

Alaska↗
PubMed1980

Computed tomographic localization of the precentral gyrus.

The superior frontal, precentral, and central sulci of fixed brain specimens were marked and then scanned by computed tomography. A constant relationship between the posterior ends of the superior frontal and precentral sulci facilitated accurate identification of the anterior border of the precentral gyrus in both unmarked fixed brains and patients. Precise localization of this gyrus can aid in localization of lesions and correlation with functional changes.

Humans↗
PubMed1979

Ventricular differences between hydrostatic hydrocephalus and hydrocephalus ex vacuo by computed tomography.

Transaxial CT scans of 100 patients with hydrostatic hydrocephalus and 50 patients with hydrocephalus ex vacuo have been reviewed with respect to measurements of: frontal horn ratio, width of the temporal horns, width of the third ventricle, width of cerebral fissures and sulci. The diagnosis of hydrostatic hydrocephalus is probable when (a) both temporal tips are visualized and measure 2 mm or greater in width and the sylvian and interhemispheric fissures and cerebral sulci are not visible, or (b) there is visualization of temporal horn tips measuring 2 mm or greater in width and the lateral ventricles are symmetrically enlarged with the frontal horn ratio 0.50 or more.

Cerebral Ventriculography↗
PubMed1979

Autism and unfavorable left-right asymmetries of the brain.

Utilizing computerized brain tomography, left-right morphologic asymmetries of the parietooccipital region were judged in 16 autistic patients, 44 mentally retarded patients, and 100 miscellaneous neurological patients. In 57% of the autistic patients the right parietooccipital region was wider than the left, while this pattern of cerebral asymmetry was found in only 23% of the mentally retarded patients and 25% of the neurological patients. It is suggested that unfavorable morphologic asymmetries of the brain near the posterior language zone may contribute to the difficulties autistic children experience in acquiring language.

Adolescent↗
PubMed1978

Right-left asymmetrics in the brain.

Structural asymmetries between the hemispheres are found in the human brain. Asymmetries in the auditory regions and in the Sylvian fissures are present even in the fetus. The Sylvian asymmetries may have existed in Neanderthal man and are found consistently in some apes. They may relate to right-left differences infunction. Thus, the striking auditory asymmetries could underlie language lateralization. The asymmetries in the frontal and occipital lobes and the lateral ventricles are correlated with hand preference. Anatomical asymmetries may help to explain the range of human talents, recovery from acquired disorders of language function, certain childhood learning disabilities, some dementing illnesses of middle life, and the evidence for behavioral lateralization in nonhuman primates.

Animals↗
PubMed1978

Developmental dyslexia. Evidence for a subgroup with a reversal of cerebral asymmetry.

The computerized brain tomograms of 24 patients with developmental dyslexia were analyzed for cerebral asymmetry. Ten patients showed a reversal of the pattern of asymmetry regularly observed in normal right-handed individuals so that the right parietooccipital region was wider than the left. The ten dyslexic patients with this reversal of cerebral asymmetry had a lower mean verbal IQ than the other 14 dyslexic patients in this study. The reversal of cerebral asymmetry that occurred in ten of the dyslexic patients may result in language lateralization to a cerebral hemisphere that is structurally less suited to support language function and thus act as a risk factor for the development of reading disability.

Adolescent↗
PubMed1978

B-scan ultrasonography of the anterior segment of the eye.

B-scan ultrasonograms of the anterior segment were performed on selected patients. The difficulties in imaging the anterior segment are discussed and the value of this technique is demonstrated by illustration of B-scans in different pathological conditions. This technique can often provide important information and allow an early and accurate prognosis.

Adult↗
PubMed1978

Fetal breathing.

Explore the source record for details and available documents.

Animals↗
PubMed1977

Asymmetries of the skull and handedness. Phrenology revisited.

Some of the asymmetries noted in cerebral computerized transaxial tomography (CTT) studies are reflected in the shape of the skull resulting most often in backward protrusion of the occipital bone on the left and a less striking forward protrusion of the right frontal bone. Asymmetries are less marked in left-handed individuals but the opposite features, i.e. forward protrusion of the left frontal bone and posterior protrusion of the right occipital bone, are more frequent in left handers than in right handers.

Adult↗
PubMed1976

Morphological cerebral asymmetries of modern man, fossil man, and nonhuman primate.

Cerebral asymmetries are common in modern and fossil man and the great apes. Those occurring most often are listed here: 1. The left sylvian fissure in man is longer than the right and in both fetal and adult brains the posterior end of the right sylvian fissure is commonly higher than the left. Associated with these findings, the left planum temporale is usually longer than the right. 2. The left occipital pole is often wider and usually protrudes more posteriorly than the right. 3. The left lateral ventricle, and especially the occipital horn, is usually larger than the right. 4. If one frontal pole extends beyond the other it is usually the right. 5. On X-ray computerized axial tomograms (CT) of the brain the right frontal lobe and the central portion of the right hemisphere more often measure wider than the left. 6. The CT studies commonly show a Yakovlevian anticlockwise torque (taking the nose as 12 o'clock), with the left occipital pole longer and often extending across the midline toward the right and a wider right hemisphere in its central and frontal portions and frequent forward protrusion of the right frontal pole. This is found also in newborns. 7. The posterior end of the sagittal sinus usually lies to the right of the midline and the sinus flows more directly into the right transverse sinus than into the left. 8. The right transverse sinus is usually higher than the left. 9. In left-handed and ambidextrous individuals the posterior ends of the sylvian fissures are more often nearly equal in height and the occipital regions are more often equal in width or the right may be wider. 10. The torque of the pyramidal tract and the hemispheral torque cannot at present be related to right- or left-handedness. Statistics concerning left-handedness are somewhat confounded, because it is likely that not a few individuals are left-handed because of an early injury of the left hemisphere in a normally right-handed individual. 11. Cerebral asymmetries are found in fossil man similar to those in modern man. 12. Asymmetries of the sylvian fissures similar to those of modern man have been found in the great apes and are particularly common in the orangutan. 13. The most striking and consistently present cerebral asymmetries found in adult and fetal brains are in the region of the posterior end of the sylvian fissures-- the areas generally regarded as a major importance in language function.

Adolescent↗
PubMed1975

Hemispheric differences in the brains of great apes.

Asymmetries are found in the cerebral hemispheres of some great apes, particularly in the orangutan, that are similar to those seen in man. Studies in the orangutan might be more likely to help in understanding the evolution of handedness or language than studies in chimpanzees.

Animals↗
PubMed1972

Enlargement of the Sylvian aqueduct: a sequel of head injuries.

A review of pneumoencephalography and clinical data in a large group of patients has shown that severe head injury may be followed by a consistent clinical-radiological syndrome. A prolonged period of unconsciousness is a characteristic initial feature of this syndrome. Clinically there is ataxia and dysarthria and, often, abnormal movements and oculomotor dysfunction. The characteristic radiological feature is an enlargement of the aqueduct of Sylvius. The clinical picture, together with the enlargement of the aqueduct, suggests that loss of neuronal and axonal substance in the midbrain is the probable pathology.

Adult↗