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Gong M, Liang W, He C, Shen Y, Zhang Z, Lou M, Xu Z. Neuroimaging mechanisms in short-term heroin- and methamphetamine-abstinent users: Similarities and differences. Neurosci Lett 2023; 796:137057. [PMID: 36621586 DOI: 10.1016/j.neulet.2023.137057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 11/23/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023]
Abstract
Heroin and methamphetamine cause great damage to individuals and society. However, numerous withdrawal mechanisms remain unidentified. In this study, 19 heroin short-term abstinent (HSTA) patients, 20 methamphetamine short-term abstinent (MSTA) patients, and 27 healthy controls (HCs) were scanned using multimodal magnetic resonance imaging. Degraded nodes of fiber tracts were identified using automated fiber quantification. Voxel- and surface-based morphometric measurements were performed to determine the gray matter volume and cortical thickness. The MSTA and HSTA groups had abnormal diffusion metrics in a variety of bilateral corticospinal tract (CST) and left superior longitudinal tract (SLT) nodes compared with the HC group. The MSTA patients reported more severely disrupted diffusion metrics in certain nodes of the bilateral anterior thalamic radiation and left inferior fronto-occipital tract than the HSTA patients. The MSTA and HSTA groups exhibited identical cortical damage in the fusiform and superior temporal gyri, as well as in the superior frontal gyrus, posterior cerebellum, and precentral gyrus. Extensive differences in gray matter lesions were observed between the MSTA and HSTA groups. Neuroimaging mechanisms of short-term abstinence may aid in the development of rehabilitation strategies.
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Affiliation(s)
- Mingqiang Gong
- The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China; Department of Radiology, Longgang Central Hospital, Shenzhen, China
| | - Wenbin Liang
- Department of Radiology, Longgang Central Hospital, Shenzhen, China
| | - Chunxue He
- Shenzhen Clinical Medicine College, Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Yunxia Shen
- Department of Radiology, Longgang Central Hospital, Shenzhen, China
| | - Zhen Zhang
- Department of Radiology, The Third People's Hospital of Longgang District, Shenzhen, China
| | - Mingwu Lou
- Department of Radiology, Longgang Central Hospital, Shenzhen, China.
| | - Ziyu Xu
- Department of Radiology, Longgang Central Hospital, Shenzhen, China.
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Singh G, Jie WWJ, Sun MT, Casson R, Selva D, Chan W. Overcoming the impact of physiologic tremors in ophthalmology. Graefes Arch Clin Exp Ophthalmol 2022; 260:3723-3736. [PMID: 35788893 DOI: 10.1007/s00417-022-05718-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 04/26/2022] [Accepted: 05/27/2022] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Ophthalmic surgery involves the manipulation of micron-level sized structures such as the internal limiting membrane where tactile sensation is practically absent. All humans have physiologic tremors that are of low amplitude and not discernible to the naked eye; they do not adversely affect the majority of the population's daily functioning. However, during microsurgery, such tremors can be problematic. In this review, we focus on the impact of physiological tremors on ophthalmic microsurgery and offer a comparative discussion on the impact of such tremors on other surgical specialties. METHODS A single investigator used the MEDLINE database (via PubMed) to search for and identify articles for inclusion in this systematic review. Ten key factors were identified as potentially having an impact on tremor amplitude: beta-blockers, muscle fatigue, robotic systems, handheld tools/micromanipulators, armrests/wrist supports, caffeine, diet, sleep deprivation, consuming alcohol, and workouts (exercise). These key terms were then searched using the advanced Boolean search tool and operators (i.e., AND, OR) available on PubMed: (*keyword*) AND (surgeon tremor OR microsurgery tremor OR hand steadiness OR simulator score). RESULTS Ten studies attempted to quantify the baseline severity of operator physiologic tremor. Approximately 89% of studies accessing the impact of tremors on performance in regards to surgical metrics reported an improvement in performance compared to 57% of studies concluding that tremor elimination was of benefit when considering procedural outcomes. CONCLUSIONS Robotic technology, new instruments, exoskeletons, technique modifications, and lifestyle factors have all demonstrated the potential to assist in overcoming tremors in ophthalmology.
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Affiliation(s)
- Gurfarmaan Singh
- School of Medicine, University of Adelaide, Health & Medical Sciences Building, 4 North Terrace, Adelaide, SA, 5000, Australia.
- Royal Adelaide Hospital, Adelaide, SA, Australia.
| | | | - Michelle Tian Sun
- School of Medicine, University of Adelaide, Health & Medical Sciences Building, 4 North Terrace, Adelaide, SA, 5000, Australia
- Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Robert Casson
- School of Medicine, University of Adelaide, Health & Medical Sciences Building, 4 North Terrace, Adelaide, SA, 5000, Australia
- Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Dinesh Selva
- School of Medicine, University of Adelaide, Health & Medical Sciences Building, 4 North Terrace, Adelaide, SA, 5000, Australia
- Royal Adelaide Hospital, Adelaide, SA, Australia
| | - WengOnn Chan
- School of Medicine, University of Adelaide, Health & Medical Sciences Building, 4 North Terrace, Adelaide, SA, 5000, Australia
- Royal Adelaide Hospital, Adelaide, SA, Australia
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