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Michele R, Ivana S, Maria DV, Luca B, Domenico L, Maria ZF, Alessandro DB, Silvio S, Khalid AO, Valeria M, Pietro A. Tracing in vivo the dorsal loop of the optic radiation: convergent perspectives from tractography and electrophysiology compared to a neuroanatomical ground truth. Brain Struct Funct 2022; 227:1357-1370. [PMID: 35320828 DOI: 10.1007/s00429-021-02430-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 11/12/2021] [Indexed: 01/18/2023]
Abstract
The temporo-parietal junction (TPJ) is a cortical area contributing to a multiplicity of visual, language-related, and cognitive functions. In line with this functional richness, also the organization of the underlying white matter is highly complex and includes several bundles. The few studies tackling the outcome and neurological burdens of surgical operations addressing TPJ document the presence of language disturbances and visual field damages, with the latter hardly recovered in time. This observation advocates for identifying and functionally monitoring the optic radiation (OR) bundles that cross the white matter below the TPJ. In the present study, we adopted a multimodal approach to address the anatomo-functional correlates of the OR's dorsal loop. In particular, we combined cadavers' dissection with tractographic and electrophysiological data collected in drug-resistant epileptic patients explored by stereoelectroencephalography (SEEG). Cadaver dissection allowed us to appreciate the course and topography of the dorsal loop. More surprisingly, both tractographic and electrophysiological observations converged on a unitary picture highly coherent with the data obtained by neuroanatomical observation. The combination of diverse and multimodal observations allows overcoming the limitations intrinsic to single methodologies, defining a unitary picture which makes it possible to investigate the dorsal loop both presurgically and at the individual patient level, ultimately contributing to limit the postsurgical damages. Notwithstanding, such a combined approach could serve as a model of investigation for future neuroanatomical inquiries tackling white matter fibers anatomy and function through SEEG-derived neurophysiological data.
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Affiliation(s)
- Rizzi Michele
- "C.Munari" Epilepsy Surgery Centre, ASST GOM Niguarda, Piazza Dell'Ospedale Maggiore, 20162, Milan, Italy
| | - Sartori Ivana
- "C.Munari" Epilepsy Surgery Centre, ASST GOM Niguarda, Piazza Dell'Ospedale Maggiore, 20162, Milan, Italy.
| | - Del Vecchio Maria
- Institute of Neuroscience, National Research Council of Italy, Parma, Italy
| | - Berta Luca
- Department of Medical Physics, ASST GOM Niguarda, Milan, Italy
| | - Lizio Domenico
- Department of Medical Physics, ASST GOM Niguarda, Milan, Italy
| | - Zauli Flavia Maria
- "C.Munari" Epilepsy Surgery Centre, ASST GOM Niguarda, Piazza Dell'Ospedale Maggiore, 20162, Milan, Italy
- Department of Biomedical and Clinical Sciences "L. Sacco", University of Milan, Milan, Italy
| | - De Benedictis Alessandro
- Department of Neurosciences, Neurosurgery Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Sarubbo Silvio
- Department of Neurosurgery, Ospedale Santa Chiara, Trento, Italy
| | - Al-Orabi Khalid
- "C.Munari" Epilepsy Surgery Centre, ASST GOM Niguarda, Piazza Dell'Ospedale Maggiore, 20162, Milan, Italy
| | - Mariani Valeria
- Neurology and Stroke Unit, ASST Sette Laghi-Ospedale di Circolo, Varese, Italy
| | - Avanzini Pietro
- Institute of Neuroscience, National Research Council of Italy, Parma, Italy
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