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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 54 (1984), S. 266-274 
    ISSN: 1432-1106
    Keywords: Optic nerve ; Fiber count ; Axon diameter ; Myelin sheath thickness ; Albino and gray rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Comparative studies were made on albino and gray rats by measuring several morphological characteristics seen in cross-sections of the optic nerve. The total cross-sectional area of the optic nerve was about 30% smaller in the albino than in the gray rat, while the fiber density was 1.4 times higher in the albino than in the gray rat. The estimated total fiber count was about the same in the two strains: around 100,000 to 110,000 fibers. Except for a few unmyelinated fibers (less than 1%) all fibers were myelinated. Axon diameters of the optic nerve fibers were distributed in smaller values for the albino than for the gray rat, though the overall diameter range was similar (0.2–3.0 μm). The myelin sheath was also thinner in the albino than in the gray rat.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 51 (1983), S. 172-178 
    ISSN: 1432-1106
    Keywords: Uncrossed optic fibers ; Optic tract fiber counts ; Axonal cross section area ; Plasticity ; Synaptic delay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In albino rats with one eye removed at birth (NE rats), electron microscopic studies were made on the optic tract (OT) to count the fibers and to measure their thickness. In addition, experiments were made in NE rats to know the physiological properties of the optic pathway such as conduction velocity, synaptic delay and so on. The number of fibers in the OT of NE rats was compared with that constituting the crossed and uncrossed pathways of normal adult rats. In NE rats the fiber count increased by about 30,000 in the OT ipsilateral to the remaining eye while it decreased by about the same amount in the contralateral OT. The axonal cross section area of OT fibers was measured as an index for fiber thickness. No marked abnormalities were found in the OTs of NE rats with regard to the morphological dimension. Relay cells (P-cells) of the LGN were recorded by electrical stimulation of the optic pathway. The uncrossed projection of NE rats to the LGN was characterized by the following points: (1) P-cells responding to stimulation of the uncrossed fibers were encountered in NE rats much more frequently than in normal adult rats. (2) Synaptic delays assumed to be involved in trans-synaptic activation of P-cells by the uncrossed fibers were calculated at larger values than for P-cells activated by the crossed fibers in NE rats and normally grown rats.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 26 (1984), S. 657-658 
    ISSN: 1432-1041
    Keywords: verapamil ; maternal milk level ; maternal blood level ; excretion of milk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1920
    Keywords: Computed tomography ; Cerebral fat embolism ; Pulmonary fat embolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A patient with cerebral fat embolism was followed by computed tomography (CT). For the first few days after injury, CT revealed no abnormality. About a week later, multiple low density areas appeared in the white matter of the frontal region. They disappeared within the subsequent 2 weeks while subdural effusions developed in the fronto-parietotemporal regions. As neurologic recovery progressed, the subdural effusions gradually diminished and cerebral atrophy was seen.
    Type of Medium: Electronic Resource
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