独特而深深的由沟回组成的表面是大脑皮层，它组成灰质。
The distinctive, deeply wrinkled outer surface is the cerebral cortex, which consists of gray matter.
我们称之为突触的自我修剪，保持意识清醒和用来复杂思维的大脑皮层，外面的灰质外层变得更薄但更高效。
This synaptic pruning, as it is called, causes the brain's cortex-the outer layer of gray matter where we do much of our conscious and complicated thinking-to become thinner but more efficient.
一组磁共振成像主要关注大脑褶皱层或者脑皮层上的灰质组织，这些组织是用来处理记忆、情绪、演讲、视觉、听力和电动机操作的地方。
One set of MRI images focused on grey matter at the brain's wrinkled surface, or cortex, where the processing of memory, emotions, speech, sight, hearing and motor control occurs.
呈皱褶状的灰质组织组成的大脑皮层的表面在儿童期是不断发育的。
The surface area of the cerebral cortex - the folded gray tissue that makes up the outermost part of the brain - grows during childhood.
本研究应用HRP逆行追踪法研究了大白鼠中脑水管周围灰质（PAG）向小脑皮层的投射。 结果表明：小脑皮层的所有注射区域均接受PAG的投射。
A cerebellar afferent connection from the periaqueductal grey (PAG) has been demonstrated in the rat by means of retrograde transport of horseradish peroxidase (HRP) in the present study.
本研究应用HRP逆行追踪法研究了大白鼠中脑水管周围灰质（PAG）向小脑皮层的投射。 结果表明：小脑皮层的所有注射区域均接受PAG的投射。
A cerebellar afferent connection from the periaqueductal grey (PAG) has been demonstrated in the rat by means of retrograde transport of horseradish peroxidase (HRP) in the present study.
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