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Microsurgical anatomy of the ventral callosal radiations: new destination, correlations with diffusion tensor imaging fiber-tracking, and clinical relevance

Laboratory investigation

Johann Peltier, Sébastien Verclytte, Christine Delmaire, Hervé Deramond, Jean-Pierre Pruvo, Daniel Le Gars, and Olivier Godefroy

= splenium of the CC; 6 = cingulate fibers; 7 = lateral longitudinal stria; 8 = cingulate gyrus; 9 = indusium griseum; 10 = forniceal insertion; 11 = crus fornicis; 12 = choroid plexus; 13 = head of the caudate nucleus. F ig . 2. Midsagittal section showing the CC and its relationships. 1 = trunk of the CC; 2 = genu of the CC; 3 = body of the CC; 14 = rostrum of the CC; 15 = callosal radiations; 16 = medial portion of the forceps minor; 17 = anterior commissure; 18 = anterior column of the fornix; 19 = medial face of the superior frontal gyrus F1. Anatomy and

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Cyst of the Sixth Ventricle (Cavum of Verga) Successful Removal through Transventricular Approach with Notes on Embryology and Histopathology

Michael Scott

pellucidum and Verga is found as a small, non-pathogenic space in 2.5 per cent of brains examined at necropsy. 1 Corning stated that in the adult an extension of this lumen as far caudally as the splenium is present in 3 per cent of all brains, and Verga observed that these cavities are found only in the human species. 1, 2, 7 The boundaries of the cavum of Verga are as follows: Anteriorly, the anterior limit of the fornix; superiorly, the body of the corpus callosum; posteriorly, the splenium of the corpus callosum; and inferiorly, the psalterium (lyra Davidis) and

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A four-wall orbital decompression for dysthyroid orbitopathy

Mirek Stranc and Michael West

medial wall and orbital floor by a transantral approach; 3, 28 removal of the roof, lateral walls, and lateral sphenoid ridge; 2, 16 and excision of the floor, medial wall, and lateral wall through a lateral canthotomy and fornix incision. 20, 21 Decompressions involving ablation of more than one wall produce better results than single-wall procedures, but “undercorrection” remains a significant problem. More recently, Maroon and Kennerdell 17 described five patients who underwent four-wall decompression through a microsurgical lateral approach to the orbit. Visual

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Oral Presentations 2015 AANS Annual Scientific Meeting Washington, DC • May 2–6, 2015

Published online August 1, 2015; DOI: 10.3171/2015.8.JNS.AANS2015abstracts

. These results suggest that DA neurons in the SN may signal the subject’s degree of attention to the task on trials that are most informative for learning decision boundaries. J Neurosurg Journal of Neurosurgery JNS 0022-3085 1933-0693 American Association of Neurological Surgeons 2015.8.JNS.AANS2015ABSTRACTS Abstract 645. Optogenetic Neuromodulation of the Hippocampus via Direct Light Stimulation of the Fimbria/Fornix Paul Koch , MD , Anand Tekriwal , BS , and John Wolf , PhD (Philadelphia, PA

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The Limbic System and Its Hippocampal Formation

Studies in Animals and Their Possible Application to Man

Paul D. MacLean

apparent at least that the foregoing studies give a physiological clue to the diversity of sensory auras associated with epileptogenic foci in this part of the brain. ABLATION STUDIES Before considering the motor phenomena associated with stimulation of the hippocampal formation, a few words may be said about the effect of excisions that interrupt the normal flow of impulses between its afferent and efferent pathways. To date, experiments aimed at ablation of the hippocampus alone, 2, 5 or severing its projections by way of the fornix, 20 have revealed

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Hydrocephalus

A Contribution Related to Treatment

Olan R. Hyndman

). As shown by the arrows, ventricular fluid now flows from ventricle into subarachnoid space of tela (cisterna venae parvae). See Fig. 2 for lateral view. C.P., choroid plexus; L.V., left ventricle; F., fornix; T., posterior aspect of 3rd ventricle; Th., upper margin of thalamus. Fig. 2. (A) Photograph of mesial surface of a normal brain showing the extensive space occupied by tela and cisterns of the small and large veins of Galen and cisterna ambiens. The spaces are sponge-like in character due to their reticulated structure. (B) Diagrammatic

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The cerebral sulci and gyri

Guilherme Carvalhal Ribas

= corpus callosum; CiG = cingulate gyrus; CiPo = cingulate pole; CiS = cingulate sulcus; ColS = collateral sulcus; CS = central sulcus; Cu = cuneus; Fo = fornix; FuG = fusiform gyrus; GRe = gyrus rectus; IIIV = third ventricle; InfRosS = inferior rostral sulcus; Ist = isthmus of cingulate gyrus; ITG = inferior temporal gyrus; IVeFo = interventricular foramen of Monro; LatV = lateral ventricle; LiG = lingual gyrus; MaCiS = marginal ramus of the cingulate sulcus; MedFG = medial frontal gyrus; OTS = occipitotemporal sulcus; PaCLob = paracentral lobule; PaCS = paracentral

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Lateral hypothalamic area deep brain stimulation for refractory obesity: a pilot study with preliminary data on safety, body weight, and energy metabolism

Clinical article

Donald M. Whiting, Nestor D. Tomycz, Julian Bailes, Lilian de Jonge, Virgile Lecoultre, Bryan Wilent, Dunbar Alcindor, E. Richard Prostko, Boyle C. Cheng, Cynthia Angle, Diane Cantella, Benjamin B. Whiting, J. Scott Mizes, Kirk W. Finnis, Eric Ravussin, and Michael Y. Oh

previous reports regarding this hypothalamic target. 13 A target approximately 6.5 mm lateral to the intercommissural line, 3 mm below the intercommissural line, and 4.5 mm posterior to the AC was chosen and then, in the Cases 2 and 3, slightly adjusted to be 4 mm lateral to the fornix and 1 mm posterior to the fornix. Akin to the refinement of ventralis intermedius nucleus targeting in movement disorder DBS by reference to the lateral wall of the third ventricle, we found that LHA targeting could be improved by regional indirect targeting based on the fornix. We

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Surgical management of colloid cysts of the third ventricle: a single-institution comparison of endoscopic and microsurgical resection

Thomas L. Beaumont, David D. Limbrick Jr., Bhuvic Patel, Michael R. Chicoine, Keith M. Rich, and Ralph G. Dacey Jr.

deep within the brain, where they are intimately associated with the fornix and critical deep draining veins to which they are commonly adherent. Historically, they have been removed with transcranial microsurgery via an interhemispheric-transcallosal (IHTC) or transcortical-transventricular (TCTV) approach. The former has been favored due to concern for an increased likelihood of seizures following transcortical approaches, although reported data are somewhat anecdotal. 5 – 7 Open microsurgical approaches have a relatively high rate of complications in reported

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Fetal nondopaminergic neural implants in parkinsonian primates

Histochemical and behavioral studies

Krzysztof S. Bankiewicz, Robert J. Plunkett, David M. Jacobowitz, Irwin J. Kopin, and Edward H. Oldfield

, 35 A similar situation exists in the rat where macrophages and microglia are present after lesions of the fimbria-fornix. 32 In those animals, sprouting from the cholinergic system occurred in response to injury. 18, 32, 36 It has been postulated that nerve growth factor from reactive astrocytes (which are activated by interleukin-1 23, 33, 34, 39, 44, 46 released from microglia 1, 20, 21, 29 ) is responsible for sprouting of cholinergic fibers. Continuous infusion of exogenous nerve growth factor has a neuronotrophic effect on both noncholinergic and