Injury of the Mammillothalamic Tract in Patients with Thalamic Hemorrhage

Kwon, Hyeok Gyu; Lee, Han Do; Jang, Sung Ho

doi:10.3389/fnhum.2014.00259

Cited by 5 publications

(6 citation statements)

References 34 publications

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“…For example, Carlesimo et al [ 3 ] have systematically analyzed memory function in patients with thalamic stroke using neuropsychological tests and have found that memory impairment in those patients is mainly related to the MTT. Another study has demonstrated that the integrity of the MTT was affected in patients with thalamic hemorrhage, thus leading to poor cognition [ 10 ]. However, these results are limited in how they can be applied to our patient.…”

Section: Discussionmentioning

confidence: 99%

Which Neural Tract Plays a Major Role in Memory Impairment After Multiple Cerebral Infarcts? A Case Report

2018

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Injury to the thalamocortical tract (one in the Papez circuit) that leads to memory impairment following brain injury is very rare. In this study, we present a case of partial injury to the thalamocortical tract that causes memory impairment after concurrent thalamic and hippocampal infarct. A 20-year-old male complained of memory impairment 1 month after partial injury to the thalamocortical tract. Using a probabilistic diffusing tensor tractography, it was found that the right thalamocortical tract was thinner than the left thalamocortical tract. However, all other neural tracts including the fornix, cingulum, and mammillothalamic tract were intact on both hemispheres. Therefore, the memory impairment in this patient was considered as being due to thalamic infarct based on the observation that the fornix from hippocampal infarct was intact. This case suggests that the assessment of lesions in the neural tracts of the Papez circuit might be useful for understanding the mechanism of memory impairment following cerebral infarction.

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Section: Discussionmentioning

confidence: 99%

Which Neural Tract Plays a Major Role in Memory Impairment After Multiple Cerebral Infarcts? A Case Report

2018

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“…32 38 39 40 Mammillary bodies affect emotional, reward, and goal-directed behaviors. 41 43 MTT provides the connection between anterior thalamic nucleus and mammillary bodies. Damage to MTT has been defended as one of the plausible pathogenic mechanisms of memory impairment in patients with thalamic lesions, along with injury of the ventral amygdalofugal pathway and the thalamocortical pathway between the mediodorsal nucleus of the thalamus and the prefrontal cortex.…”

Section: Discussionmentioning

confidence: 99%

“…Damage to MTT has been defended as one of the plausible pathogenic mechanisms of memory impairment in patients with thalamic lesions, along with injury of the ventral amygdalofugal pathway and the thalamocortical pathway between the mediodorsal nucleus of the thalamus and the prefrontal cortex. 43 The optic chiasm is located under the lamina terminalis, in front of the infundibular recess. 44 In surgeries where the choroidal fissure is opened by microdissection from the thalamic side, complications due to thalamus damage may be encountered.…”

Section: Crucial Intraventricular Neural Framework Obtained Via Ertvmentioning

confidence: 99%

Endoscopic Endonasal Approach to the Third Ventricle Using the Surgical Corridor of the Reverse Third Ventriculostomy: Anatomo-Surgical Nuances

Çamlar

Turkis

Bayramlı

et al. 2022

J Neurol Surg B Skull Base

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Objective Surgical access to the third ventricle can be achieved through various corridors depending on the location and extent of the lesion; however, traditional transcranial approaches risk damage to multiple critical neural structures. Methods Endonasal approach similar to corridor of the reverse third ventriculostomy (ERTV) was surgically simulated in eight cadaveric heads. Fiber dissections were additionally performed within the third ventricle along the endoscopic route. Additionally, we present a case of ERTV in a patient with craniopharyngioma extending into the third ventricle. Results The ERTV allowed adequate intraventricular visualization along the third ventricle. The extracranial step of the surgical corridor included a bony window in the sellar floor, tuberculum sella, and the lower part of the planum sphenoidale. ERTV provided an intraventricular surgical field along the foramen of Monro to expose an area bordered by the fornix anteriorly, thalamus laterally, anterior commissure anterior superiorly, posterior commissure, habenula and pineal gland posteriorly, and aqueduct of Sylvius centered posterior inferiorly. Conclusion The third ventricle can safely be accessed through ERTV either above or below the pituitary gland. ERTV provides a wide exposure of the third ventricle through the tuber cinereum and offers access to the anterior part as far as the anterior commissure and precommissural part of fornix and the whole length of the posterior part. Endoscopic ERTV may be a suitable alternative to transcranial approaches to access the third ventricle in selected patients.

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“…mechanisms of memory impairment in patients with thalamic lesions, along with injury of the ventral amygdalofugal pathway and the thalamocortical pathway between the mediodorsal nucleus of the thalamus and the prefrontal cortex. [44] The optic chiasm is located under the lamina terminalis, in front of the infundibular recess [45] In surgeries where the choroidal fissure is opened by microdissection from the thalamic side, complications due to thalamus damage may be encountered. [45] Many studies have been conducted to investigate the relationship of thalamic nuclei with amnesia.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Endoscopic Endonasal Approach to the Third Ventricle Using the Surgical Corridor of the Reverse Third Ventriculostomy: Anatomo-Surgical Nuances

Çamlar

Turkis

Bayramlı

et al. 2022

J Neurol Surg B Skull Base

View full text Add to dashboard Cite

Objective: Surgical access to the third ventricle can be achieved through various corridors depending on the location and extent of the lesion; however, traditional transcranial approaches risk damage to multiple critical neural structures. Methods: Endonasal approach similar to corridor of the reverse third ventriculostomy (ERTV) was surgically simulated in eight cadaveric heads. Fiber dissections were additionally performed within the third ventricle along the endoscopic route. Additionally, we present a case of ERTV in a patient with craniopharyngioma extending into the third ventricle. Results: The ERTV allowed adequate intraventricular visualization along the third ventricle. The extracranial step of the surgical corridor included a bony window in the sellar floor, tuberculum sella and the lower part of the planum sphenoidale. ERTV provided an intraventricular surgical field along the foramen of Monro to expose an area bordered by the fornix anteriorly, thalamus laterally, anterior commissure anterior superiorly, posterior commissure, habenula and pineal gland posteriorly, and aqueduct of Sylvius centered posterior inferiorly. Conclusion: The third ventricle can safely be accessed through ERTV either above or below the pituitary gland. ERTV provides a wide exposure of the third ventricle through the tuber cinereum and offers access to the anterior part as far as the anterior commissure and pre-commissural part of fornix and the whole length of the posterior part. Endoscopic ERTV may be a suitable alternative to transcranial approaches to access the third ventricle in selected patients.

show abstract

Injury of the Mammillothalamic Tract in Patients with Thalamic Hemorrhage

Cited by 5 publications

References 34 publications

Which Neural Tract Plays a Major Role in Memory Impairment After Multiple Cerebral Infarcts? A Case Report

Which Neural Tract Plays a Major Role in Memory Impairment After Multiple Cerebral Infarcts? A Case Report

Endoscopic Endonasal Approach to the Third Ventricle Using the Surgical Corridor of the Reverse Third Ventriculostomy: Anatomo-Surgical Nuances

Endoscopic Endonasal Approach to the Third Ventricle Using the Surgical Corridor of the Reverse Third Ventriculostomy: Anatomo-Surgical Nuances

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