Estudo micro-mesoscópico das granulações aracnóides humanas

Miranda Neto, Marcílio Hubner de; Biazoto, Walter; Chopard, Renato Paulo; Lucas, Guilherme Araújo

doi:10.1590/S0004-282X1990000200001

Resumos

A anatomia funcional das granulacões aracnóides do seio sagital superior foi estudada por técnicas micro-mesoscópicas a fim de contribuir para esclarecimentos de vias de drenagem do liqüido cerebrospinal através de seus componentes fibrosos. A disposição dos elementos fibrosos foi analisada na base do pedículo, pedículo, centro e ápice da granulação. A análise dos cortes seriados mostra na base do pedículo, malhas de colágeno com morfologia predominantemente circular orientando-se longitudinalmente no sentido do maior eixo do pedículo. Estes feixes emergem no centro da granulação, ramificando-se a seguir em direção ao ápice e à periferia da granulação. Os feixes elásticos possuem disposição semelhante à descrita para feixes colágenos e delimitam, com estes, canais intercomunicantes desde a base do pedículo ao ápice da granulação. Encontramos, na base do pedículo, feixes de fibras reticulares dispostos entre as malhas de colágeno. A cápsula fibrosa da granulação encontra-se constituída de feixes colágenos e de pequena quantidade de fibras elásticas.

The functional anatomy of the arachnoid granulations of the upper sagittal sinus was studied by means of micromesoscopic techniques in order to contribute to elucidating aspects of drainage pathways of the cerebrospinal fluid through their fibrous components. The arrangement of fibrous elements was analysed at the base of the peduncle, peduncle, middle and apex of granulation. The analysis of seriate sections shows collagen bundles at the base of the peduncle with a predominantly circular morphology, longitudinally directed towards the peduncle's longest axis. These bundles arise in the middle of the granulation, them branch off towards its apex and periphery. The elastic bundles present an arrangement similar to that described for collagen bundles, delimiting with such bundles intercommunication channels from the base of the peduncle up to the apex of the granulation. Bundles of reticular fibers arranged in between the collagen meshes were found at the base of the peduncle. The fibrous capsule of granulation is ccmposed of collagen bundles and a small number of elastic fibers.

Marcílio Hubner de Miranda Neto^I; Walter Biazoto^I; Renato Paulo Chopard^II; Guilherme Araújo Lucas^II

^IDepartamento de Biologia, Universidade Estadual de Maringá

^IIDepartamento de Anatomia, Instituto de Ciências Biomédicas, Universidade de São Paulo (USP)

RESUMO

A anatomia funcional das granulacões aracnóides do seio sagital superior foi estudada por técnicas micro-mesoscópicas a fim de contribuir para esclarecimentos de vias de drenagem do liqüido cerebrospinal através de seus componentes fibrosos. A disposição dos elementos fibrosos foi analisada na base do pedículo, pedículo, centro e ápice da granulação. A análise dos cortes seriados mostra na base do pedículo, malhas de colágeno com morfologia predominantemente circular orientando-se longitudinalmente no sentido do maior eixo do pedículo. Estes feixes emergem no centro da granulação, ramificando-se a seguir em direção ao ápice e à periferia da granulação. Os feixes elásticos possuem disposição semelhante à descrita para feixes colágenos e delimitam, com estes, canais intercomunicantes desde a base do pedículo ao ápice da granulação. Encontramos, na base do pedículo, feixes de fibras reticulares dispostos entre as malhas de colágeno. A cápsula fibrosa da granulação encontra-se constituída de feixes colágenos e de pequena quantidade de fibras elásticas.

SUMMARY

The functional anatomy of the arachnoid granulations of the upper sagittal sinus was studied by means of micromesoscopic techniques in order to contribute to elucidating aspects of drainage pathways of the cerebrospinal fluid through their fibrous components. The arrangement of fibrous elements was analysed at the base of the peduncle, peduncle, middle and apex of granulation. The analysis of seriate sections shows collagen bundles at the base of the peduncle with a predominantly circular morphology, longitudinally directed towards the peduncle's longest axis. These bundles arise in the middle of the granulation, them branch off towards its apex and periphery. The elastic bundles present an arrangement similar to that described for collagen bundles, delimiting with such bundles intercommunication channels from the base of the peduncle up to the apex of the granulation. Bundles of reticular fibers arranged in between the collagen meshes were found at the base of the peduncle. The fibrous capsule of granulation is ccmposed of collagen bundles and a small number of elastic fibers.

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Dr. Renato Paulo Chopard - Anatomia Descritiva, USP - Av. Dr. Arnaldo 455 . 01246 São Paulo SP - Brasil

1. Alksne JF, Lovings ET - The role of the arachnoid villus in the removal of red blood cells from the subarachnoid space: an electron microscope study in the dog. J Neurosurg 36:192, 1972.
2. Bargmann W - Histologia y Anatomia Microscópica Humana. Ed 3. Labor, Rio de Janeiro, 1968, pg 930.
3. Clark LC - On the pacchioniam bodies. J Anat 55:40, 1920.
4. Gushing H - Some experimental and clinical observations concerning the states of increased intra-cranial tension. Am JA Med Sci 124:373, 1902.
5. D'Avella D, Cicciarello R, Albiero A, Andriolo G - Scanning electron microscope study of human arachnoid villi. J Neurosurg 59:620, 1983.
6. Gomez DG, Potts DG, Deonarine V - Arachnoid granulations of the sheep. Arch Neurol 30:169, 1974.
7. Jayatilaka ADP - An electron microscopic study of sheep arachnoid granulations. J Anat 99:635, 1965.
8. Kida S, Yamashima T, Kubota T, Ito H, Yamamoto S - A light and electron microscopic and inimunohistochemical study of human arachnoid villi. J Neurosurg 69:429, 1988.
9. Portela-Gomes F - Granulações de Pacchioni e vilosidades aracnóides. Gaz Méd Port 17:223, 1964.
10. Potts DG, Kenneth FR, Deonarine V - Morphology of the arachnoid villi and granulations. Radiology 105:333, 1972.
11. Potts DG, Deonarine V - Effect of positional changes and jugular vein compression on the pressure gradient across the arachnoid villi and granulations of the dog. J Neurosurg 38:722, 1973.
12. Shabo A, Maxwell DS - The morphology of the arachnoid villi: a light and electron microscopic study in the monkey. J Neurosurg 29:464, 1968.
13. Shabo A, Abbott MM - The response of the arachnoid villus to an intracisternal injection of autogenous brain tissue. Neurology 19:724, 1969.
14. Upton ML, Weller RO, Path FRC - The morphology of cerebrospinal fluid drainage pathways in human arachnoid granulations. J Neurosurg 63:867, 1985.
15. Weed LH - Studies on the cerebrospinal fluid: II. The theories of drainage of cerebrospinal fluid with an analysis of the methods of investigation. J Med Res 31:21, 1914.
16. Weed LH - An anatomical consideration of the cerebrospinal fluid. Anat Res 12:641, 1917.
17. Weed LH - Meninges and cerebrospinal fluid. J Anat 72:180, 1938.
18. Welch K, Friedman V - The cerebrospinal fluid valves. Brain 83:454, 1960.
19. Welch K, Pollay M - Perfusion of particules through arachnoid villi of the monkey. Am J Physiol 201:651, 1961.
20. Wolpow ER, Schaumberg HH - Structure of the human arachnoid granulation. J Neurosurg 37:724, 1972.
21. Yamashima T - Functional ultrastructure of cerebrospinal fluid drainage channels in human arachnoid villi. J Neurosurg 22:633, 1988.
22. Zaki W- Developement des granulations arachnoidennes. Bull Assoc Anat 161:283, 1977.

Estudo micro-mesoscópico das granulações aracnóides humanas

A micromesoscopic study of human arachnoid granulations

Datas de Publicação

Publicação nesta coleção
25 Maio 2011
Data do Fascículo
Jun 1990

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] 1. Alksne JF, Lovings ET - The role of the arachnoid villus in the removal of red blood cells from the subarachnoid space: an electron microscope study in the dog. J Neurosurg 36:192, 1972.

[2] 2. Bargmann W - Histologia y Anatomia Microscópica Humana. Ed 3. Labor, Rio de Janeiro, 1968, pg 930.

[3] 3. Clark LC - On the pacchioniam bodies. J Anat 55:40, 1920.

[4] 4. Gushing H - Some experimental and clinical observations concerning the states of increased intra-cranial tension. Am JA Med Sci 124:373, 1902.

[5] 5. D'Avella D, Cicciarello R, Albiero A, Andriolo G - Scanning electron microscope study of human arachnoid villi. J Neurosurg 59:620, 1983.

[6] 6. Gomez DG, Potts DG, Deonarine V - Arachnoid granulations of the sheep. Arch Neurol 30:169, 1974.

[7] 7. Jayatilaka ADP - An electron microscopic study of sheep arachnoid granulations. J Anat 99:635, 1965.

[8] 8. Kida S, Yamashima T, Kubota T, Ito H, Yamamoto S - A light and electron microscopic and inimunohistochemical study of human arachnoid villi. J Neurosurg 69:429, 1988.

[9] 9. Portela-Gomes F - Granulações de Pacchioni e vilosidades aracnóides. Gaz Méd Port 17:223, 1964.

[10] 10. Potts DG, Kenneth FR, Deonarine V - Morphology of the arachnoid villi and granulations. Radiology 105:333, 1972.

[11] 11. Potts DG, Deonarine V - Effect of positional changes and jugular vein compression on the pressure gradient across the arachnoid villi and granulations of the dog. J Neurosurg 38:722, 1973.

[12] 12. Shabo A, Maxwell DS - The morphology of the arachnoid villi: a light and electron microscopic study in the monkey. J Neurosurg 29:464, 1968.

[13] 13. Shabo A, Abbott MM - The response of the arachnoid villus to an intracisternal injection of autogenous brain tissue. Neurology 19:724, 1969.

[14] 14. Upton ML, Weller RO, Path FRC - The morphology of cerebrospinal fluid drainage pathways in human arachnoid granulations. J Neurosurg 63:867, 1985.

[15] 15. Weed LH - Studies on the cerebrospinal fluid: II. The theories of drainage of cerebrospinal fluid with an analysis of the methods of investigation. J Med Res 31:21, 1914.

[16] 16. Weed LH - An anatomical consideration of the cerebrospinal fluid. Anat Res 12:641, 1917.

[17] 17. Weed LH - Meninges and cerebrospinal fluid. J Anat 72:180, 1938.

[18] 18. Welch K, Friedman V - The cerebrospinal fluid valves. Brain 83:454, 1960.

[19] 19. Welch K, Pollay M - Perfusion of particules through arachnoid villi of the monkey. Am J Physiol 201:651, 1961.

[20] 20. Wolpow ER, Schaumberg HH - Structure of the human arachnoid granulation. J Neurosurg 37:724, 1972.

[21] 21. Yamashima T - Functional ultrastructure of cerebrospinal fluid drainage channels in human arachnoid villi. J Neurosurg 22:633, 1988.

[22] 22. Zaki W- Developement des granulations arachnoidennes. Bull Assoc Anat 161:283, 1977.