1
|
Mitsuhashi M, Yamaguchi R, Kawasaki T, Ueno S, Sun Y, Isa K, Takahashi J, Kobayashi K, Onoe H, Takahashi R, Isa T. Stage-dependent role of interhemispheric pathway for motor recovery in primates. Nat Commun 2024; 15:6762. [PMID: 39174504 PMCID: PMC11341697 DOI: 10.1038/s41467-024-51070-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 07/26/2024] [Indexed: 08/24/2024] Open
Abstract
Whether and how the non-lesional sensorimotor cortex is activated and contributes to post-injury motor recovery is controversial. Here, we investigated the role of interhemispheric pathway from the contralesional to ipsilesional premotor cortex in activating the ipsilesional sensorimotor cortex and promoting recovery after lesioning the lateral corticospinal tract at the cervical cord, by unidirectional chemogenetic blockade in macaques. The blockade impaired dexterous hand movements during the early recovery stage. Electrocorticographical recording showed that the low frequency band activity of the ipsilesional premotor cortex around movement onset was decreased by the blockade during the early recovery stage, while it was increased by blockade during the intact state and late recovery stage. These results demonstrate that action of the interhemispheric pathway changed from inhibition to facilitation, to involve the ipsilesional sensorimotor cortex in hand movements during the early recovery stage. The present study offers insights into the stage-dependent role of the interhemispheric pathway and a therapeutic target in the early recovery stage after lesioning of the corticospinal tract.
Collapse
Affiliation(s)
- Masahiro Mitsuhashi
- Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Reona Yamaguchi
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, 606-8501, Japan
| | - Toshinari Kawasaki
- Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
- Department of Neurosurgery, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Satoko Ueno
- Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, 606-8501, Japan
| | - Yiping Sun
- Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Kaoru Isa
- Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Jun Takahashi
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto, 606-8507, Japan
| | - Kenta Kobayashi
- Section of Viral Vector Development, National Institute for Physiological Sciences, Okazaki, 444-8585, Japan
- Graduate University of Advanced Studies (SOKENDAI), Hayama, 240-0193, Japan
| | - Hirotaka Onoe
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, 606-8397, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, 606-8507, Japan
| | - Tadashi Isa
- Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan.
- Institute for the Advanced Study of Human Biology (WPI-ASHBi), Kyoto University, Kyoto, 606-8501, Japan.
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, 606-8397, Japan.
| |
Collapse
|
2
|
Burwell SC, Yan H, Lim SS, Shields BC, Tadross MR. Natural phasic inhibition of dopamine neurons signals cognitive rigidity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.09.593320. [PMID: 38766037 PMCID: PMC11100816 DOI: 10.1101/2024.05.09.593320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
When animals unexpectedly fail, their dopamine neurons undergo phasic inhibition that canonically drives extinction learning-a cognitive-flexibility mechanism for discarding outdated strategies. However, the existing evidence equates natural and artificial phasic inhibition, despite their spatiotemporal differences. Addressing this gap, we targeted a GABAA-receptor antagonist precisely to dopamine neurons, yielding three unexpected findings. First, this intervention blocked natural phasic inhibition selectively, leaving tonic activity unaffected. Second, blocking natural phasic inhibition accelerated extinction learning-opposite to canonical mechanisms. Third, our approach selectively benefitted perseverative mice, restoring rapid extinction without affecting new reward learning. Our findings reveal that extinction learning is rapid by default and slowed by natural phasic inhibition-challenging foundational learning theories, while delineating a synaptic mechanism and therapeutic target for cognitive rigidity.
Collapse
Affiliation(s)
- Sasha C.V. Burwell
- Department of Neurobiology, Duke University, Durham, NC
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD
| | - Haidun Yan
- Department of Biomedical Engineering, Duke University, NC
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD
| | - Shaun S.X. Lim
- Department of Biomedical Engineering, Duke University, NC
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD
| | - Brenda C. Shields
- Department of Biomedical Engineering, Duke University, NC
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD
| | - Michael R. Tadross
- Department of Neurobiology, Duke University, Durham, NC
- Department of Biomedical Engineering, Duke University, NC
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD
| |
Collapse
|
3
|
Stuphorn V. Dopamine regulates attitude toward risk. Science 2024; 383:32-33. [PMID: 38175885 DOI: 10.1126/science.adm8641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Specific brain pathways can lower or raise the willingness of monkeys to take risks.
Collapse
Affiliation(s)
- Veit Stuphorn
- Department of Neuroscience, Johns Hopkins University School of Medicine and Zanvyl Krieger Mind/Brain Institute, Baltimore, MD, USA
- Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD, USA
| |
Collapse
|