An Anatomic Study of the Inferior Longitudinal Fasciculus

Davis, Loyal

doi:10.1001/archneurpsyc.1921.02180280011002

Cited by 60 publications

(16 citation statements)

References 3 publications

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“…While these less distinct subregions are also associated with differential white matter fibre bundles (namely, the inferior longitudinal fasciculus, the temporo-frontal/inferior fronto-occipital fasciculus, and the middle longitudinal fasciculus respectively), they appear to comprise less spatially distinct pathways with strongly overlapping origin/termination areas. Indeed, the close similarity with neighbouring parahippocampal ventral areas may reflect the existence of abundant U-shaped fibres that connect adjacent areas of cortex within these ventral temporal regions (Catani et al, 2003, Davis, 1921). This is consistent with the finding that individual voxels in the brain may be connected to distant areas by more than one fibre bundle (Déjerine and Déjerine-Klumpke, 1895, Krestel et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

A graded tractographic parcellation of the temporal lobe

et al. 2017

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The temporal lobe has been implicated in multiple cognitive domains through lesion studies as well as cognitive neuroimaging research. There has been a recent increased interest in the structural and connective architecture that underlies these functions. However there has not yet been a comprehensive exploration of the patterns of connectivity that appear across the temporal lobe. This article uses a data driven, spectral reordering approach in order to understand the general axes of structural connectivity within the temporal lobe.Two important findings emerge from the study. Firstly, the temporal lobe's overarching patterns of connectivity are organised along two key structural axes: medial to lateral and anteroventral to posterodorsal, mirroring findings in the functional literature. Secondly, the connective organisation of the temporal lobe is graded and transitional; this is reminiscent of the original work of 19th Century neuroanatomists, who posited the existence of some regions which transitioned between one another in a graded fashion. While regions with unique connectivity exist, the boundaries between these are not always sharp. Instead there are zones of graded connectivity reflecting the influence and overlap of shared connectivity.

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Section: Discussionmentioning

confidence: 99%

A graded tractographic parcellation of the temporal lobe

et al. 2017

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“…However, it was noted very early on that the fibers of the optic radiation intermingle with those of the ILF. 70 Diffusion tensor imaging is limited in its ability to separate tracks that cross or run closely in parallel and thus the effect in ILF could, in principle, also stem from an impairment in the optic radiation, or vice versa. Our distance analysis indeed shows regions of both tracts that are affected and that are very close together.…”

Section: Discussionmentioning

confidence: 99%

The Structural Properties of Major White Matter Tracts in Strabismic Amblyopia

Duan

Norcia

Yeatman

et al. 2015

Invest. Ophthalmol. Vis. Sci.

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PURPOSE. In order to better understand whether white matter structural deficits are present in strabismic amblyopia, we performed a survey of the tissue properties of 28 major white matter tracts using diffusion and quantitative magnetic resonance imaging approaches.METHODS. We used diffusion-based tensor modeling and a new quantitative T1 protocol to measure fractional anisotropy (FA), mean diffusivity (MD), and myelin-sensitive T1 values. We surveyed tracts in the occipital lobe, including the vertical occipital fasciculus (VOF)-a newly rediscovered tract that bridges dorsal and ventral areas of the occipital lobe, as well as tracts across the rest of the brain. RESULTS.Adults with long-standing strabismic amblyopia show tract-specific elevations in MD. We rank-ordered the tracts on the basis of their MD effect-size. The four most affected tracts were the anterior frontal corpus callosum (ACC), the right VOF, the left inferior longitudinal fasciculus (ILF) and the left optic radiation. CONCLUSIONS.The results suggest that most white matter tissue properties are relatively robust to the early visual insult caused by strabismus. However, strabismic amblyopia does affect MD, not only in occipital tracts, such as the VOF and optic radiation, but also in long range association tracts connecting visual cortex to the frontal and temporal lobes (ILF) and connecting the two hemispheres (ACC).

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“…The inferior longitudinal fasciculus was first identified by Burdach in 1822 and elaborated upon by the Déjerines (Burdach, 1822;Davis, 1921;Déjerine & Dejerine-Klumpke, 1895;Tusa & Ungerleider, 1985). It has been traditionally described as a long, arched tract that connects the temporal pole, hippocampal formation and inferior temporal gyrus to most of the occipital lobe (see Davis, 1921).…”

Section: Inferior Longitudinal Fasciculusmentioning

confidence: 99%

Section: Inferior Longitudinal Fasciculusmentioning

confidence: 99%

“…It has been traditionally described as a long, arched tract that connects the temporal pole, hippocampal formation and inferior temporal gyrus to most of the occipital lobe (see Davis, 1921). In the 19 th and early 20 th centuries, there was a debate in the anatomical literature as to whether the ILF was indeed an association tract (Burdach, 1822;Davis, 1921;Tusa & Ungerleider, 1985). Tusa and Ungerleider suggested that the ILF was not a single tract but a succession of U-fibres connecting adjacent cortical regions from the occipital lobe down through the inferior temporal gyrus, which they termed the 'occipitotemporal projection system' (Tusa & Ungerleider, 1985).…”

Section: Inferior Longitudinal Fasciculusmentioning

confidence: 99%

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Transport for language south of the Sylvian fissure: The routes and history of the main tracts and stations in the ventral language network

Bajada

Ralph

Cloutman

2015

Cortex

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It is now ten years since a 'ventral language pathway' was demonstrated in vivo in the human brain. In the intervening decade, this result has been replicated and expanded to include multiple possible pathways and functions. Despite this considerable level of research interest, age-old debates regarding the origin, course, termination and, indeed, the very existence of the tracts identified still remain. The current review examines four major tracts associated with the ventral 'semantic' language network, with the aim of elucidating and clarifying their structural and functional roles. Historical and modern conceptualisations of the tracts' neuroanatomical origins and terminations will be discussed, and key discrepancies and debates examined. It is argued that much of the controversy regarding the language pathways has resulted from inconsistencies in terminology, and the lack of a white matter 'lingua franca'.

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An Anatomic Study of the Inferior Longitudinal Fasciculus

Abstract: , quoted from Niessl-Mayendorf (Footnote 7). 2. Burdach: Von Bau und Leiten des Gehirns 1:152, 1822, quoted from Niessl-Mayendorf (Footnote 7).

Cited by 60 publications

References 3 publications

A graded tractographic parcellation of the temporal lobe

A graded tractographic parcellation of the temporal lobe

The Structural Properties of Major White Matter Tracts in Strabismic Amblyopia

Transport for language south of the Sylvian fissure: The routes and history of the main tracts and stations in the ventral language network

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