相关实验视频
Updated: Jun 11, 2025

09:42
Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
Published on: May 12, 2019
6.0K
对象非刚性的异性:皮质异性异性的高层次感知后果
1Graduate Center for Vision Research, State University of New York, 33 West 42nd St, New York, NY 10036.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
对象刚性的视觉感知是异型的,受大脑视觉皮层的影响. 这项研究揭示了有线的皮质特性如何塑造我们对非刚性运动的感知.
科学领域:
- 神经科学是一个神经科学.
- 视觉感知 视觉感知 视觉感知
- 计算神经科学是一种神经科学.
背景情况:
- 已知皮质异质,如初级视觉皮质 (V1) 中的定向选择性,会影响视觉处理.
- 据认为,这些异构性可以优化自然图像统计的编码.
- 它们在更高层次的感知现象 (如物体刚性) 中所扮演的角色不太清楚.
研究的目的:
- 为了研究被感知对象非刚性中的异构性.
- 通过V1.1中低级神经元特性的人口分布来解释这种异构性.
- 探索皮层异构对光流计算和形状恒定的影响.
主要方法:
- 在不同方向下测量旋转的圆环的视觉解释.
- 从V1输出解码感知形状的变化,考虑到皮质异形.
- 在光流计算中纳入皮层异构,以分析动态梯度.
主要成果:
- 观察者认为水平旋转的环是刚性的,垂直旋转的环是不刚性的.
- 垂直旋转的环被认为比水平的更窄,更长.
- 采用皮质异质相结合的光学流量计算,与感知的刚性和非刚性保持一致.
结论:
- 高层次的非刚性感知在很大程度上是由有线的皮质异质物形成的.
- 皮层异质性导致形状恒定性和物体刚性感知失败.
- 这些异构体在感知中的进化功能需要进一步研究.
相关概念视频
Somatosensation
36.5K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
36.5K
Motor and Sensory Areas of the Cortex
3.1K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor...
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor...
3.1K
Vision
53.0K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
53.0K
Somatosensory, Motor, and Association Cortex
427
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
427
Factors Affecting Perception
1.5K
Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
An illustrative example of a perceptual set is the scenario where an airline pilot told...
1.5K
Stereoisomerism
11.8K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.8K

