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Related Concept Videos

Understanding Consciousness01:23

Understanding Consciousness

Consciousness can be defined as the state of being aware of and able to think about one's existence, sensations, and surroundings. It encompasses two major components: awareness and arousal. Awareness pertains to the recognition of environmental stimuli and internal states. At the same time, arousal refers to the physiological readiness to engage with these stimuli, which varies significantly between states like sleep and wakefulness.
Sleep, a crucial state, is characterized by reduced physical...
Subconsciousness and No Awareness01:15

Subconsciousness and No Awareness

The concept of subconscious awareness refers to the processing of information below the level of conscious thought, which significantly influences both behaviors and decisions. It is also known as waking subconscious awareness. This complex level of cognition operates without the direct awareness of the individual, facilitating rapid and simultaneous handling of multiple information streams.
An illustrative example of subconscious processing is its role in problem-solving. Often, individuals...
Cerebral Hemispheres01:05

Cerebral Hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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...
Region of Convergence01:17

Region of Convergence

The z-transform is a powerful mathematical tool used in the analysis of discrete-time signals and systems. It is a crucial tool in the analysis of discrete-time systems, but its convergence is limited to specific values of the complex variable z. This range of values, known as the Region of Convergence (ROC), is fundamental in determining the behavior and stability of a system or signal. The ROC defines the region in the complex plane where the z-transform converges, which can take various...

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Updated: Jun 26, 2026

Assessment and Communication for People with Disorders of Consciousness
07:37

Assessment and Communication for People with Disorders of Consciousness

Published on: August 1, 2017

No consciousness without continents.

Malcolm A MacIver1,2,3,4, Daniel A Dombeck4

  • 1Department of Mechanical Engineering, Northwestern University, EvanstonIL, USA maciver@northwestern.edu.

The Behavioral and Brain Sciences
|June 24, 2026
PubMed
Summary
This summary is machine-generated.

Consciousness evolved via natural selection, offering survival benefits by enabling animals to distinguish reality from possibilities. This allows adaptation to changing environments and planning for future needs.

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Area of Science:

  • Evolutionary Biology
  • Cognitive Science
  • Neuroscience

Background:

  • Consciousness is a product of natural selection, but its specific adaptive advantages remain debated.
  • Existing theories lack a clear explanation for how consciousness provides a survival benefit.

Purpose of the Study:

  • To propose a testable thesis on the selective benefit of consciousness.
  • To explain how distinguishing reality from hypothetical futures aids survival in land animals.

Main Methods:

  • The study presents a theoretical framework, not empirical data.
  • It analyzes the evolutionary pressures on land animals related to environmental complexity and future uncertainty.

Main Results:

  • Fleming & Michel's thesis posits that separating the real from the hypothetical is crucial for survival.
  • This ability, driven by the potential for future scenarios, offers a selective advantage.

Conclusions:

  • Consciousness provides a critical survival advantage by enabling foresight and adaptive planning.
  • Further research is needed to explain the mechanisms of conscious planning in humans and other animals.