The transverse gyrus and the orbitofrontal insula relationship.

Slides:

Advertisements

Similar presentations

Images of a 51-year-old woman (patient 8) with generalized tonicoclonic status epilepticus. Images of a 51-year-old woman (patient 8) with generalized.

Advertisements

Coronal gadolinium-enhanced T1-weighted image (TR/TE/NEX, 500/15/2) at the level of the foramen rotundum demonstrates an enhancing V2 branch on the right.

Anti-N-methyl D-aspartate receptor encephalitis.

A–C, Anatomy of the convexity surface of the left insular lobe after resection of the overlying opercula, vessels, and pia-arachnoid. A–C, Anatomy of the.

Images from the case of a 62-year-old man with malignant lymphoma

Slice no. 5. Slice no. 5. T2-weighted coronal image (20/9.2/12) at the level of the temporal horns (33 weeks' gestation). Large arrow, cingulate sulcus;

A and B, Axial T2-weighted MR images in the AC-PC plane.

Case 19: 14-month-old boy with bilateral frontal and sylvian polymicrogyria. Case 19: 14-month-old boy with bilateral frontal and sylvian polymicrogyria.

A 22-year-old man with posterior left frontal grade 2 astrocytoma.

Continued. Continued. E, Light microscopic image of the left hippocampus obtained by amygdalohippocampectomy reveals extensive neuronal loss and gliosis.

Types I and II LTS. Axial contrast-enhanced T1-weighted MR image obtained in a 55-year-old man with a type I LTS on the left and a type II LTS on the right.

Images obtained in a 67-year-old woman with posttreatment glioblastoma who had ETP. Contrast-enhanced, T1-weighted imaging (A) performed 4 weeks after.

Contrast-enhanced fat-suppressed T1-weighted MR images obtained through the orbits show diffuse homogeneous thickening of the medial, lateral, and inferior.

Description of the different biometric parameters measured with MR imaging. Description of the different biometric parameters measured with MR imaging.

Three-dimensional display of lobar regions.

A 7-month-old boy with left hemimegalencephaly

A 53-year-old male patient with temporal lobe epilepsy (case 31).

A 50-year-old woman with fever and severe hypertension.

Illustration of occipital region and upper cervical vertebrae viewed from behind showing course of greater occipital nerve (G) with possible sites of compression:

T2-weighted images of a patient with an infarction within the anterior MCA branch territory on day 5 (patient 15) show high SI changes within the ipsilateral.

Axial CT sections involving vital structures of the temporal bone.

A, Axial CT of a patient with bilateral DON and lack of fat prolapse through the superior ophthalmic fissure. A, Axial CT of a patient with bilateral DON.

Relationship of the insula to the temporal operculum.

A, Sagittal view through the brain stem and cervical spinal cord shows the extent of T2 hyperintensities involving the pyramidal tract and posterior columns.

Anatomic specimen. Anatomic specimen. Superior surface of the brain after removal of the pia-arachnoid and surface vasculature. Note the positions, alignments,

T2-weighted, PD-weighted, FLAIR, and DWI images showing cortical abnormalities in the right parietal lobe; FLAIR and DWI also show abnormalities in the.

Dissected Meyer’s loop with the inferior occipitofrontal fasciculus and the uncinate fasciculus.A, Photograph of the lateral aspect of a dissected cerebral.

MR imaging from a 33-year-old woman who had experienced classical migraine with aura since her teens, but was otherwise asymptomatic It shows how marked.

3D TOF MR angiograms.A, Angiogram of the circle of Willis with the complete anterior configuration shows the AcoA (arrow).B, Angiogram of the circle of.

A–C, DWI scan (A) shows acute infarction involving the left cerebellar hemisphere, which appears iso- to hyperintense on the b0 EPI scan (B). A–C, DWI.

Four-point subjective rating scale of the perihippocampal fissures (PHF).A and B, Axial and coronal view of same case. Four-point subjective rating scale.

A, A 44-year-old woman with CP

A 7-day old neonate, the older sister of patient 1, also presented with neonatal encephalopathy.Axial fast spin-echo T2-weighted image (130/4200/1[TE/TR/NEX])

A–D, The typical pattern of lesion distribution includes confluent lesions in the external capsule (A: subject B4), the subcortical white matter of the.

MR spectrum of a normal frontal lobe obtained at 1

Axial reconstructed images of rotational angiogram of the left external carotid artery show the fistulous pouch (white arrows) draining through the posterior.

Coronal postcontrast T1-weighted image of the orbits in patient 1 demonstrates a heterogeneously enhancing ovoid lesion involving the right medial rectus.

A, The axial HRCT image of the right temporal bone in case 1 shows an erosion in the posterior temporal bone wall (arrow). A, The axial HRCT image of the.

Contrast-agent–enhanced T1-weighted MR images (700/15) obtained in a 71-year-old man with skin cancer, who had TMJ tenderness and discomfort in the left.

56-year-old woman evaluated with CT angiography for aneurysm of the supraclinoid segment of the internal carotid artery.A, Three-dimensional volume-rendered.

Demonstration of the medial longitudinal fasciculus (asterisk) throughout the brain stem. Demonstration of the medial longitudinal fasciculus (asterisk)

Sagittal T1-weighted MR image of the pituitary gland in a term neonate (born at gestational week 38) obtained near term (corrected age of 39 weeks; 7 days.

Sagittal T1-weighted MR image of the pituitary gland in a preterm neonate (born at gestational week 28) obtained near term (corrected age of 39 weeks;

A, Sagittal T1-weighted image demonstrates a mildly hypointense well-defined mass arising from the posterior aspect of the tongue abutting the inferior.

Z-score brain surface map represents areas of metabolic reduction in patients in comparison with healthy subjects (data base group). Z-score brain surface.

Z-score brain surface map represents the result of group comparison between 2 healthy subjects groups such as control group (CG) and data base group (DBG).

Midsagittal MDCT image of the craniocervical junction demonstrates the Powers ratio, which is calculated by dividing the distance between the tip of the.

Scatterplots of the MDI and orbital apex angle (A), MDI and medial wall angle (B), and MDI and lateral wall angle (C) in patients with and without ON.

Images of a 22-month-old male patient with severe left temporal lobe epilepsy that was recognized at age 9 months after bacterial meningitis at age 6 months.A.

Axial CT scan shows decalcification of sphenoid bone (arrowheads) adjacent to neurofibroma infiltration of the lateral rectus muscle (arrows) in the absence.

Axial T2-weighted image (A) demonstrates focal cortical dysplasia (arrow) centered in the left anterior temporal lobe in a right-handed patient. Axial.

Sagittal MPRAGE (A) and axial T2-weighted (B) images demonstrate extensive focal cortical dysplasia (arrow) involving most of the visualized left frontal.

The “white gray sign.” Axial high-resolution 3D inversion recovery fast-spoiled gradient-echo T1-weighted image demonstrates decreased gray-white contrast.

Intraoperative images show a typical pearly appearance of a cholesteatoma (arrow, A), in the aditus ad antrum, next to the posterior wall of the EAC (dashed.

Imaging plane for arterial spin labeling method.

A, Sagittal fast spin-echo (FSE) T2-weighted image shows a hypointense mass (arrowheads) in the anterior aspect of the spinal canal that extends from C3.

Examples of types of AICA loops and eighth CN-AICA relationships.

DMN changes in patients with HE

Z-score brain surface map of representative cases shows a prominent metabolic reduction on respective gyrus level segment in cingulate gyrus.Top, 46-year-old.

Clinical correlation of uncinate fasciculus involvement on cross-sectional MR imaging.A, Nonenhanced parasagittal T1-weighted image in a 36-year-old woman.

A, Axial T2-weighted image reveals thickening of the cortical gray matter at the medial aspect of both frontal lobes, compatible with bifrontal cortical.

The ASPECTS system scores arteries distal to the occlusion (0, artery not seen; 1, less prominent; 2, equal or more prominent compared with a matching.

Patient 16: gestational-week fetus.

Consecutive cranial to caudal axial T2-weighted MR images demonstrate L4 and L5 nerve root anatomy. Consecutive cranial to caudal axial T2-weighted MR.

A 31-year-old woman with an atypical descending thoracic VA

Visible atrophic changes after moderate TBI

Case 2. Case 2. A, Coronal unenhanced T1-weighted image through the base of the skull. The left pterygopalatine fossa appears infiltrated by soft tissue.

Temporal squama comminuted fracture: 3D reconstruction of the exocranial surface of the right temporal bone of sample S1 with a volume-rendering technique.

Two cases with Sylvian fissure SAH

Positions of subdural strip electrodes in a 16-year-old male adolescent with pharmacorefractory focal epilepsy resulting from tuberous sclerosis. Positions.

Presentation transcript:

The transverse gyrus and the orbitofrontal insula relationship. The transverse gyrus and the orbitofrontal insula relationship. Base view of the orbital surface of the left frontal lobe after resection of part of the gyrus rectus (GR) and the anterior portion of the temporal lobe (T). Medial is to the reader’s left. I indicates olfactory bulb; II, optic chiasm and tract. The H-shaped orbital sulcus (arrowheads) defines the MOG, POG, anterior orbital gyrus (AOG), and lateral orbital gyrus (LOG). At the posteromedial aspect of the orbitofrontal surface, the posterior portion of the MOG merges with the medial portion of the POG to form the prominent PMOL. PMOL gives rise to the transverse insular gyrus (t) that extends laterally to form the pole (po) of the insula just anteroinferomedial to the apex (asterisk) of the insula. The CS (dashed line) curves inferiorly immediately behind and below the apex and the pole en route to join the stem of the sylvian fissure. The ASG (a) and the PSG (p) converge to form the apex of the insula anterior to the CS. In this image, the deliberate slight rotation used to illustrate the course of the transverse gyrus from the PMOL to the pole also rotates the apex medially, so the apex does not appear to lie as far lateral in position as it would in a true base view. Thomas P. Naidich et al. AJNR Am J Neuroradiol 2004;25:222-232 ©2004 by American Society of Neuroradiology