Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy
Objectives: Medial temporal lobe epilepsy (mTLE) is characterized by decreased hippocampal volume, which results in motor memory consolidation impairments. However, the extent to which motor memory acquisition are affected in humans with mTLE remains poorly understood. We therefore examined the exte...
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Frontiers Media S.A.
2018-09-01
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| Series: | Frontiers in Human Neuroscience |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fnhum.2018.00367/full |
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| author | Jinyi Long Yanyun Feng HongPeng Liao Quan Zhou M. A. Urbin |
| author_facet | Jinyi Long Yanyun Feng HongPeng Liao Quan Zhou M. A. Urbin |
| author_sort | Jinyi Long |
| collection | DOAJ |
| description | Objectives: Medial temporal lobe epilepsy (mTLE) is characterized by decreased hippocampal volume, which results in motor memory consolidation impairments. However, the extent to which motor memory acquisition are affected in humans with mTLE remains poorly understood. We therefore examined the extent to which learning of a motor tapping sequence task is affected by mTLE.Methods: MRI volumetric analysis was performed using a T1-weighted three-dimensional gradient echo sequence in 15 patients with right mTLE and 15 control subjects. Subjects trained on a motor sequence tapping task with the left hand in right mTLE and non-dominant hand in neurologically-intact controls.Results: The number of correct sequences performed by the mTLE patient group increased after training, albeit to a lesser extent than the control group. Although hippocampal subfield volume was reduced in mTLE relative to controls, no differences were observed in the volumes of other brain areas including thalamus, caudate, putamen and amygdala. Correlations between hippocampal subfield volumes and the change in pre- to post-training performance indicated that the volume of hippocampal subfield CA2–3 was associated with motor sequence learning in patients with mTLE.Significance: These results provide evidence that individuals with mTLE exhibit learning on a motor sequence task. Learning is linked to the volume of hippocampal subfield CA2–3, supporting a role of the hippocampus in motor memory acquisition.Highlights-Humans with mTLE exhibit learning on a motor tapping sequence task but not to the same extent as neurologically-intact controls.-Hippocampal subfield volumes are significantly reduced after mTLE. Surrounding brain area volumes do not show abnormalities.-Hippocampal subfield CA2–3 volume is associated with motor sequence learning in humans with mTLE. |
| first_indexed | 2024-12-21T14:15:31Z |
| format | Article |
| id | doaj.art-3674050e9be6402a8ea066fb50007a1c |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-21T14:15:31Z |
| publishDate | 2018-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-3674050e9be6402a8ea066fb50007a1c2022-12-21T19:00:56ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612018-09-011210.3389/fnhum.2018.00367378249Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe EpilepsyJinyi Long0Yanyun Feng1HongPeng Liao2Quan Zhou3M. A. Urbin4College of Information Science and Technology, Jinan University, Guangzhou, ChinaDepartment of Radiology, The First People’s Hospital of Foshan, Foshan, ChinaSchool of Automation Science and Engineering, South China University of Technology, Guangzhou, ChinaDepartment of Neurology, The First People’s Hospital of Foshan, Foshan, ChinaDepartment of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United StatesObjectives: Medial temporal lobe epilepsy (mTLE) is characterized by decreased hippocampal volume, which results in motor memory consolidation impairments. However, the extent to which motor memory acquisition are affected in humans with mTLE remains poorly understood. We therefore examined the extent to which learning of a motor tapping sequence task is affected by mTLE.Methods: MRI volumetric analysis was performed using a T1-weighted three-dimensional gradient echo sequence in 15 patients with right mTLE and 15 control subjects. Subjects trained on a motor sequence tapping task with the left hand in right mTLE and non-dominant hand in neurologically-intact controls.Results: The number of correct sequences performed by the mTLE patient group increased after training, albeit to a lesser extent than the control group. Although hippocampal subfield volume was reduced in mTLE relative to controls, no differences were observed in the volumes of other brain areas including thalamus, caudate, putamen and amygdala. Correlations between hippocampal subfield volumes and the change in pre- to post-training performance indicated that the volume of hippocampal subfield CA2–3 was associated with motor sequence learning in patients with mTLE.Significance: These results provide evidence that individuals with mTLE exhibit learning on a motor sequence task. Learning is linked to the volume of hippocampal subfield CA2–3, supporting a role of the hippocampus in motor memory acquisition.Highlights-Humans with mTLE exhibit learning on a motor tapping sequence task but not to the same extent as neurologically-intact controls.-Hippocampal subfield volumes are significantly reduced after mTLE. Surrounding brain area volumes do not show abnormalities.-Hippocampal subfield CA2–3 volume is associated with motor sequence learning in humans with mTLE.https://www.frontiersin.org/article/10.3389/fnhum.2018.00367/fullepilepsymotor sequence learningmedial temporal lobehippocampusMRI |
| spellingShingle | Jinyi Long Yanyun Feng HongPeng Liao Quan Zhou M. A. Urbin Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy Frontiers in Human Neuroscience epilepsy motor sequence learning medial temporal lobe hippocampus MRI |
| title | Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy |
| title_full | Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy |
| title_fullStr | Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy |
| title_full_unstemmed | Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy |
| title_short | Motor Sequence Learning Is Associated With Hippocampal Subfield Volume in Humans With Medial Temporal Lobe Epilepsy |
| title_sort | motor sequence learning is associated with hippocampal subfield volume in humans with medial temporal lobe epilepsy |
| topic | epilepsy motor sequence learning medial temporal lobe hippocampus MRI |
| url | https://www.frontiersin.org/article/10.3389/fnhum.2018.00367/full |
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