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Transverse temporal gyrus

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Last Updated: 18 January 2022

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General | Latest Info

Transverse temporal gyrus

Details
Part ofTemporal lobe
PartsPrimary auditory cortex
ArteryMiddle cerebral
Identifiers
Latingyri temporales transversi
NeuroNames1520
TA98A14.1.09.140
TA25491
FMA72016

In 1878, Richard Ladislas Heschl was first author to describe anterior transverse temporal gyrus, in Uber die vordere quere Schlafenwindung des menschlichen Grosshirns. 7 this gyrus, know today as Heschls gyrus, is to contain primary auditory cortex, as it reliably exhibits tonotopic map 3 presumably originating from tonotopic maps encode by cochleae. Myriad investigations of Heschls gyrus have been carried out relate to many aspects of auditory processing, including developmental maturation, 15 normal auditory processing, disorders of auditory processing such as autism, 18 pitch processing in musicians, 20 and auditory hallucinations in schizophrenia, 2 among many others. Number Of Techniques Have Been Used To Examine Auditory Cortex, Including Transcranial Direct Current Stimulation, 11 PET, 13 Magnetoencephalography, 9 And Functional MRI. 16 Techniques used to analyze white matter within and in contact with auditory cortex, such as volumetric morphometry, 17 electron microscopy, 1 and diffusion MRI, 6 often reveal asymmetry between 2 hemispheres, which is hypothesized to be related to language lateralization. In this article, Fernandez, Velasquez, Garcia Porrero, Marco de Lucas, and Martino present converging evidence from cadaveric fiber dissections, in vivo diffusion MRI tractography, and intraoperative subcortical stimulation to describe complex white matter architecture in posterior region of superior temporal lobe around Heschls gyrus and acoustic radiations. 5 authors perform detailed dissections in cadaveric hemispheres. They also acquired and analyzed data from diffusion MRI probabilistic tractography in 8 control hemispheres from 4 healthy subjects and intraoperative electrical stimulation mapping in 6 patients with left lobe gliomas who underwent awake resections. Base on this data, authors propose that 5 fiber tracts pass through high-density tract area, which they term Heschls gyrus fiber intersection area. These tracts anterior arcuate fasciculus, middle longitudinal fasciculus, acoustic radiation and U fibers connecting Heschls gyrus with middle temporal gyrus and, beneath this, inferior fronto-occipital fasciculus and optic radiation. Article Contains High-quality Cerebral Hemisphere Dissection Panels Which Show These Tracts. Authors relate their findings of fiber relationships to language theory. Specifically, they note that their work supports hypothesis that primary auditory area directly contacts anterior arcuate fasciculus posteriorly. This contact between primary auditory area and anterior arcuate fasciculus could be viewed as support for existence of external and internal loops of auditory feedback and articulatory loop essential for speech articulation. Hickok and Poeppel propose framework of dorsal and ventral streams involved in language production, 8 which itself rests on Libermans motor theory of speech perception. 14 inspire by emerging understanding of visual processing via distinct ventral and dorsal streams, Hickock and Poeppel propose 2 processing streams for language: ventral stream, which they postulate is in mapping sound onto meaning, and dorsal stream, involved in mapping sound onto articulatory-base representations. In present article, Fernandez et al.

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* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Introduction

Temporal Lobe Of Brain Is Often Referred To As Neocortex. It forms cerebral cortex in conjunction with occipital lobe, parietal lobe, and frontal lobe. It is located mainly in middle cranial fossa, space located close to skull base. It is anterior to occipital lobe and posterior to frontal lobe. It is found inferior to lateral fissure, also as Sylvian Fissure or lateral sulcus. Temporal Lobe Subdivided Further Into Superior Temporal Lobe, Middle Temporal Lobe, And Inferior Temporal Lobe. It houses several critical brain structures, including hippocampus and amygdala.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Results

Temporal Lobe., Lateral view of left hemisphere. Lateral Surface Of Temporal Lobe Consists Of Three Parallel Gyri: Superior, Middle, And Inferior Temporal Gyri. These gyri are separated by superior and Temporal sulci. Lateral parietotemporal line, imaginary line connecting preoccipital notch and parietooccipital sulcus, separates Temporal and occipital lobes, and occipitotemporal line, imaginary line connecting posterior of sylvian ssure with Lateral parietotemporal line, separates temporal and parietal lobes. B, Inferior view left Temporal Lobe. Basal Surface Of Temporal Lobe Consists Of, From Lateral TO Medial, Inferior Margin Of Inferior Temporal Gyrus, Fusiform Gyrus, And Parahippocampal Gyrus. Fusiform gyrus separate laterally from Inferior Temporal gyrus by occipitotemporal sulcus, and medially from parahippocampal gyrus by collateral posteriorly and rhinal sulci anteriorly, which are not continuous in every case. Basal parietotemporal line connecting preoccipital notch and inferior end of parietooccipital sulcus separate Temporal and occipital lobes basal surface. C, relationship of Temporal Lobe with bony structures in right hemisphere. Cranial sutures and temporal line have been preserve, and dura has been open. Pterion Is Located At Lateral Margin Of Sphenoid Ridge Near Junction Of Coronal, Squamosal, And Frontosphenoid Sutures And Lateral End Of Greater Sphenoid Wing And Stem Of Sylvian Ssure. Squamosal suture follows anterior part of posterior limb of sylvian ssure before turning downward, at level of postcentral and supramarginal gyri, TO cross junction middle and posterior third of Temporal Lobe. Pole Of Temporal Pole Ts Into Cupped Inner Surface Of Greater Wing Of Sphenoid Bone. Most of lateral surface of Temporal Lobe is position deep TO squamous part of temporal bone, except, posterior part of lateral surface extending deep TO parietal bone. Basal Surface Of Temporal Lobe Sits On Oor Of Middle Fossa And Is Position At Level Of Upper Edge Of Zygomatic Arch. D, medial view of Temporal Lobe in right hemisphere. This region is divided into three segments: middle, and posterior. Anterior Segment Begins At Where Rhinal Sulcus Turn Upward At Posterior Edge Of Temporal Pole TO Vertical Line Crossing Posterior Edge Of Uncus, Middle Segment Extends From This Point TO Level Of Quadrigeminal Plate, And Posterior Segment Extends From Quadrigeminal Plate TO Calcarine Point Located At Junction Of Parietooccipital And Calcarine Sulci. E, superior view of Temporal Lobe.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

Sources

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions.

* Please keep in mind that all text is machine-generated, we do not bear any responsibility, and you should always get advice from professionals before taking any actions

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