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Organization of the Brain01:30

Organization of the Brain

The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Cerebrum: Anatomical Overview II01:11

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...
Brain Imaging01:14

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Neurons as Communicators of the Brain01:22

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Functional Brain Systems: Limbic System01:15

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Cerebrum: Anatomical Overview I01:26

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The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...

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Related Experiment Video

Updated: May 9, 2026

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping
13:12

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Published on: August 12, 2019

[The present in the brain].

Ikuya Murakami1

  • 1Department of Psychology, The University of Tokyo.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|August 7, 2013
PubMed
Summary
This summary is machine-generated.

The brain represents the present through multiple perceptual timelines, processing visual information to create subjective experiences of time. These timelines, influenced by estimation and context, can lead to time illusions.

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Last Updated: May 9, 2026

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Context:

  • Investigates the neural basis of time perception, focusing on the human visual system.
  • Explores how visual information processing contributes to the conscious experience of spatio-temporal relations, object duration, and mental time.
  • Discusses low-level neural mechanisms, including spatiotemporal receptive fields and biphasic temporal impulse response functions, for timing external events.

Purpose:

  • To review theoretical and experimental issues concerning the representation of the present in the brain.
  • To elucidate how visual primitives are reconstructed into perceptual timelines for conscious temporal experience.
  • To examine the role of context, estimation, prediction, and postdiction in spatio-temporal localization and subjective time perception.

Summary:

  • The brain constructs subjective present experiences via perceptual timelines, processing visual cues for spatio-temporal localization and duration.
  • Neurons with specific receptive fields extract elementary spatial and temporal information, forming the basis of these timelines.
  • Subjective aspects of time, like perceived timing and duration, arise from estimation processes, making them susceptible to illusions.

Impact:

  • Highlights that multiple, potentially conflicting, perceptual timelines can coexist, serving as internal clocks for various objects and modalities.
  • Addresses the challenge of timeline calibration and the brain's capacity for flexible recalibration using salient time markers.
  • Provides insights into the neural underpinnings of time perception, subjective present, and the phenomenon of time illusion.