Okajimas Folia Anatomica Japonica
Online ISSN : 1881-1736
Print ISSN : 0030-154X
ISSN-L : 0030-154X
Volume 33, Issue 2-3
Displaying 1-5 of 5 articles from this issue
  • Shinji Matsumoto
    1959 Volume 33 Issue 2-3 Pages 87-103
    Published: 1959
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
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  • Itsuo Nonaka
    1959 Volume 33 Issue 2-3 Pages 105-118
    Published: 1959
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Dissection of 32 bodies of Macacus cyclopsis was done and the following were obtained for the facial veins.
    I. The veins of the face are received by V. facialis and V. retromandibularis.
    II. V. facialis passes beneath the pars orbitalis M. orbitalis oculi, M. levator labii superioris alaeque nase, M. malaris and Platysma and runs toward the mandibular angle. It then courses backward between the mandibula and the glandula submandibularis and in most cases enters the V. jugularis externa either directly of after joining with the V. retromandibularis at the height of slightly below the middle of the external side of M. sternocleidomastoideus. The veins received by V. facialis are as follows.
    1. Most usually there is one V. supratrochlearis on each side which follow a symmetrical course (87.5%), but there are cases in which there is a single vessel which bifurcates at the root of the nose or cases in which both of the preceeding two forms are present simultaneously while in other cases it is absent.
    2. V. supraorbitalis is always present.
    3. V. angularis is always present.
    4. Vv. nasales externae arise in the venous network on the bridge of the nose. The veins anastomose and form several vessels, two in most cases (53.1%), which. run upward to enter the V. angularis.
    5. V. labialis superior which is unaccompanied by an artery consists of two vessels in most cases (70.3%).
    6. V. faciei profunda was noted in almost all cases (98.4%) and opens into the V. facialis generally immediately below the point of crossing of the Ductus parotideus and V. facialis (92.2%).
    7. V. buccalis was noted in the greater majority of cases (98.4%).
    8. Vv. massetericae anterior are always present.
    9. Vv. labiales inferiores were always present. In very rare cases, they anastomosed with the V. labialis superior.
    10. R. comm. v. temp. med. was present in a l most all cases (96.8%). There were cases in which its presence could not be recognized.
    III. V. retromandibularis descends in the substance of the parotid gland to the lower edge of the parotid gland. It enters the V. jugularis externa either directly or after joining with the V. facialis at slightly below the middle of the M. sternocleidomastoideus.
    Veins received by the V. retromandibularis are as follows:
    1. V. auriculoccipitalis is always found and in the majority of cases it enters the V. retromandibularis in the lower portion of the parotid gland.
    2. V v. temporales superficiales become a single vessel and unite with V. temporalis media after which it enters the V. temporalis communis.
    3. V. temporalis media is a single vessel and is present in all cases.
    4. V. auricularis anterior is always present.
    5. V. temporalis communis is always present.
    6. V. transversa faciei most frequently enters, so-called, the Conf. v. preaur. (98.4%) and anteriorly usually anastomoses with V. comitantes ductus parotidei (53.8%) or V. facialis (28.6%).
    7. Vv. articulares mandibulae are always pres e nt and enter V. transversa faciei.
    8. Vv. c omitantes ductus parotidei run backward along the parotid duct and chiefly join V. temporalis communis (98.4%). Anteriorly, they primarily anastomose with V. facialis (53.3%).
    9. Vv. massetericae posterior consist of one or two vessels and are present in all cases.
    10. Vv. parotideae consist of 3 or 4 vessels and are never absent.
    11. A vein corresponding to the Conf. v. preaur. in man (of Mochizuki) is recognized but in Macacns cyclopsis V. facialis do es not contribute to its formation.
    IV. The state of union between V. facialis, V. retromandibularis and V. jugularis externa may be classified into 4 types but in the greatest number of cases V. facialis and V. retromandibularis unite and in addition form a large external jugular venous loop (46.9%).
    Also, in a small number of cases the anterior and posterior branches of the external jugular venous loop formed further small loops.
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  • Michinao Kurushima
    1959 Volume 33 Issue 2-3 Pages 119-130
    Published: 1959
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
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  • Ryohei Honjin, Toshio Nakamura, Masato Imura
    1959 Volume 33 Issue 2-3 Pages 131-155
    Published: 1959
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    The axoplasmic changes d u ring the early stages of W a 11 e r i a n degeneration of the sciatic nerves of the frog and mouse were studied by electron microscopy. The axons were examined from 12 hours to 7 days after the severance of nerve at intervals of 12 hours. The electron microscopic analysis was performed on ultrathin sections of tissues removed from the nerve at a distance about 5 mm. from the peripheral stump and fixed in buffered 1 per cent solution of osmium tetraoxide (pH 7.25 to 7.4). The results obtained are summarized as follows:
    1. T he first sign of degenerative changes in the formed elements of the severed nerve fibers appears in the axoplasm in either case of the frog and mouse, but the degeneration advances more ra pidly in the nerve fibers of the mouse than in those of the frog.
    2. The earliest changes in the axoplasmic entities appear in the endoplasmic reticulum which swells up and then disintegrates into fragments of minute uneven granular materials.
    3. The alterations of the mitochond r ia appear somewhat later than those of the endoplasmic reticulum. The mitochondria swell up vacuollary and become filled with less electron-dense materials. The cristae mitocnondaiales diminish in number and then disappear. Subsequeutly the mitochondria are broken up into fragments and disintegrate into rough masses.
    4. The degenerative changes of the neurofilaments appear either at the same time as, or slightly later than, those of the mitochondria. The first sign of alteration is loss of the preferred longitudinal orientaion of the filaments. The neurofilaments diminish in number and assume a reticulated pattern. Then they undergo complete disintegration. The diminution and reticulated changes of the neurofilaments take place between 4 and 5 days after operation in the frog nerve, and between 24 and 48 hours in the mouse nerve. The complete destruction of the neurofilaments occurs on the 6th postoperative day in the frog nerve, and on the 3rd postoperative day in mouse nerve.
    5. Th e axons of the large-sized myelinated fibers degenerate more rapidly than those of the small-sized ones. The non-myelinated axon is the most resistant of all among the nerve axons.
    6. As to the onset and progress of the failure of conduction of nerve impulse in degenerating nerve fiber, marked degenerative changes in the axoplasmic entities may be said to take place at a time when the excitability of nerve fibers is within normal limits. This seems to indicate that the hypothesis regarding the neurofilaments as a conduction materials is hardly tenable.
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  • Takao Setoguti, Fumihisa Sakuma
    1959 Volume 33 Issue 2-3 Pages 157-170
    Published: 1959
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    1) The density of hair and hair groups in 16 regions over the whole body in 10 Macacus cyclopsis were investigated.
    2) The density of hair was greatest in the order of scalp, nape, back, lumbar region and extremities. It was the least on the abdomen and chest. On the extremities, it is greater on extensor or lateral side of the proximal region than elsewhere.
    3) The density of hair groups generally w as found to be parallel to the density of hair.
    4) Hair groups that were observed ranged from single-hair to eight-hair groups and were the greatest in number on the back and nape. The most common types were single-hair to four-hair groups and in particular the frequency of two-hair and three-hair groups was the greatest in all regions.
    5) Compared with man, both the density of hair and hair groups were similar to that of fetus rather than adults or infants, though there was marked difference from man in hair group type.
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