相关实验视频
Updated: Jul 17, 2026
09:09
Dissecting the Non-human Primate Brain in Stereotaxic Space
Published on: July 16, 2009
10.1K
人与子的转移学习确定了前额白质作为预测子大脑年龄的关键决定因素
Sheng He1, Yi Guan2, Chia Hsin Cheng2
1Harvard Medical School, Boston Children's Hospital, Boston, MA, United States.
Frontiers in aging neuroscience
|November 29, 2023
概括
使用深度学习 (DL) 的人工智能 (AI) 可以估计子的大脑年龄. 从人类大脑扫描中转移学习显著提高了准确性,识别了额头白质作为衰老洞察力的关键.
科学领域:
- 神经科学是一个神经科学.
- 人工智能的人工智能
- 生物医学成像技术 生物医学成像技术
背景情况:
- 使用人工智能的大脑年龄估计提供了对衰老的客观看法.
- 对于大脑年龄预测的深度学习 (DL) 在样本大小和可解释性方面面临挑战.
- 动物模型,如 rhesus 子,对于研究因受控因素导致的衰老有价值.
研究的目的:
- 将人工智能驱动的大脑年龄估计适用于动物模型,特别是 rhesus 子.
- 为了克服动物大脑MRI数据集中的数据不足,使用转移学习.
- 开发一种可解释且准确的AI模型,用于非人类灵长类动物的大脑衰老研究.
主要方法:
- 利用转移学习,将先前在8859个人类大脑MRI上训练过的AI模型应用于子大脑MRI上.
- 评估了用于大脑年龄估计的3D ResNet和2D全球局部变压器模型.
- 通过模型分析确定了通过模型分析为年龄预测做出贡献的关键大脑区域.
主要成果:
- 转移学习显著提高了子大脑年龄估计的准确性和稳定性.
- 3D ResNet模型获得了最高的精度 (MAE = 1.83年),其次是2D全球局部变压器 (MAE = 1.92年).
- 额头白质被确定为预测子大脑年龄的最关键特征.
结论:
- 转移学习有效地解决了将DL应用于动物大脑衰老的数据限制.
- 这项研究介绍了第一个可解释的,基于人工智能的非人类灵长类动物的大脑年龄估计器.
- 开发的方法在各种动物和疾病模型中具有广泛的AI应用潜力.
相关概念视频
01:56Gastrulation
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...
01:51Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
01:22Language Development
Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
01:30Biological Influences on Intelligence
Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter more...