Microsurgical Anatomy of the Optic Radiation and Related Fibers in 3-Dimensional Images


Autoria(s): Parraga, Richard Gonzalo; Ribas, Guilherme Carvalhal; Welling, Leonardo Christiaan; Alves, Raphael Vicente; de Oliveira, Evandro
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

30/10/2013

30/10/2013

02/08/2013

Resumo

BACKGROUND: The fiber dissection technique provides unique 3-dimensional anatomic knowledge of the white matter. OBJECTIVE: To examine the optic radiation anatomy and its important relationship with the temporal stem and to discuss its findings in relation to the approaches to temporal lobe lesions. METHODS: We studied 40 cerebral hemispheres of 20 brains that had been fixed in formalin solution for 40 days. After removal of the arachnoid membrane, the hemispheres were frozen, and the Klingler technique was used for dissection under magnification. Stereoscopic 3-dimensional images of the dissection were obtained for illustration. RESULTS: The optic radiations are located deep within the superior and middle temporal gyri, always above the inferior temporal sulcus. The mean distance between the cortical surface and the lateral edge of the optic radiation was 21 mm. Its fibers are divided into 3 bundles after their origin. The mean distance between the anterior tip of the temporal horn and the Meyer loop was 4.5 mm, between the temporal pole and the anterior border of the Meyer loop was 28.4 mm, and between the limen insulae and the Meyer loop was 10.7 mm. The mean distance between the lateral geniculate body and the lateral margin of the central bundle of the optic radiation was 17.4 mm. CONCLUSION: The white matter fiber dissection reveals the tridimensional intrinsic architecture of the brain, and its knowledge regarding the temporal lobe is particularly important for the neurosurgeon, mostly because of the complexity of the optic radiation and related fibers.

Identificador

NEUROSURGERY, PHILADELPHIA, v. 71, n. 8, Special Issue, supl. 1, Part 1-2, pp. 160-171, SEP, 2012

0148-396X

http://www.producao.usp.br/handle/BDPI/36831

http://dx.doi.org/ñ encontrei DOI

Idioma(s)

eng

Publicador

LIPPINCOTT WILLIAMS & WILKINS

PHILADELPHIA

Relação

NEUROSURGERY

Direitos

closedAccess

Copyright LIPPINCOTT WILLIAMS & WILKINS

Palavras-Chave #FIBER DISSECTION #MICROSURGICAL ANATOMY #OPTIC RADIATION #SAGITTAL STRATUM #SURGICAL APPROACHES #TEMPORAL STEM #VISUAL DEFICITS #TEMPORAL-LOBE EPILEPSY #VISUAL FIELD CHANGES #SELECTIVE AMYGDALOHIPPOCAMPECTOMY #TRANSSYLVIAN APPROACH #SURGICAL-TREATMENT #MEYERS LOOP #BRAIN #DISSECTION #SURGERY #REGION #CLINICAL NEUROLOGY #SURGERY
Tipo

article

original article

publishedVersion