Brainstem is surrounded by noteworthy dense packed white matter fibers which must be preserved during surgery. Brain stem surgery carries serious risks. It is very important to know about the localization of the tumor and the eloquent white matter tracts for surgery decision and for preoperative neurosurgical planning. In this report, four cases with brain stem mass were discussed. The three of...

We have developed a 2.1 mm outer diameter optical coherence tomography endoscope that provides radial scans of luminal structures. The endoscope consists of three elements: (1) a stationary central core containing the fibers and focusing elements, (2) a rotating intermediate tube with a distal rod prism, and (3) a stationary sterilized glass cover. This design enables radial and spiral scanning...

Neroe endings and deposits of cholinesterase were stained in frozen sections of five normal striated human eye muscles with a stain that combines the neroe fiber techniijue of Hortega and the method of Koelle and Friedenwald for the demonstration of cholinesterase. Cholinesterase deposits are found at the base of the motor end plates. Dense cholinesterase deposits can also he found around thin ...

We find that the media and adventitia of adult human cerebral arteries contain elastic fibers forming a dense, coherent network, similar to that found in muscular arteries of the same size in other organs. The external elastic layer in the adult human is masked for the currently employed staining methods. By treatment with 90% formic acid before fixation, the original staining character of elas...

Hereditary sclerosing poikiloderma (HSP) is a very rare disease. The clinical features are principally widespread poikiloderma and linear hyperkeratotic and sclerotic bands. We report an 18-yr-old male who presented reticular hyperpigmented lesions on the trunk and extremities since 2-yr-old. Also, linear sclerosing bands appeared on both antecubital and popliteal fossae after yr. Histopatholog...

In the present paper, a systematic study of the vesicular component found in the unmyelinated nerve fibers of the intestinal nervous plexus from the serosa to the mucosa of the guinea pig was carried out. This vesicular component containing dense granules with diameters from 300 to 1100 Ä was distinguished from the synaptic vesicles of 100 to 500 Ä. The distribution of granules and vesicles of ...

SUMMARY The force exerted by cardiac muscle usually has been estimated as wall stress, i.e., force per unit area of cross-section. This calculation fails to allow for the decrease in number of muscle fibers per square centimeter as the fibers shorten and become thicker during systole. To describe better the behavior of actual muscle fibers, a model composed of fibers has been identified and exa...

Although bone is continually being remodeled and ultimately declines with aging, little is known whether similar changes occur in the sensory and sympathetic nerve fibers that innervate bone. Here, immunohistochemistry and confocal microscopy were used to examine changes in the sensory and sympathetic nerve fibers that innervate the young (10 days post-partum), adult (3 months) and aging (24 mo...