Module 8: Basic Consciousness Concepts

What is consciousness?

Our subjective awareness of ourselves and our environment, including thoughts, feelings, perceptions, and awareness of surroundings

What are the main components of consciousness?

Thoughts, emotions, sensory perceptions, and awareness of self and environment

What is the normal state of consciousness?

A baseline state where a person is awake, alert, aware, and able to respond purposefully and communicate effectively

What abilities are present in a normal conscious state?

Awareness of surroundings, purposeful responses to stimuli, and effective communication

What is a minimally conscious state (MCS)?

A condition with minimal but definite awareness where individuals may show inconsistent but purposeful behaviors

How does MCS differ from a vegetative state?

MCS shows some awareness and purposeful behavior, while vegetative state shows none

What are examples of behaviors in MCS?

Following simple commands, purposeful movement, or emotional responses

What is a vegetative state?

A condition where a person is awake (sleep-wake cycles present) but not aware of themselves or their environment

What physical functions remain in a vegetative state?

Breathing, sleep-wake cycles, and eye opening/closing

What type of behavior is absent in a vegetative state?

Purposeful or voluntary behavior

What is general anesthesia?

A medically induced, reversible state of unconsciousness used during surgery

How does general anesthesia differ from coma?

It is controlled, reversible, and medically induced

What is a coma?

A deep, prolonged state of unconsciousness where a person cannot be awakened

What are key signs of a coma?

Closed eyes, no sleep-wake cycle, no response to stimuli

Can people recover from a coma?

Yes, but outcomes vary depending on brain damage

What is brain death?

The complete and irreversible loss of all brain function, including the brainstem

Why is brain death significant?

It is considered legal and medical death

How do scientists assess consciousness in unresponsive patients?

Using fMRI to detect brain activity during mental imagery tasks

What is the tennis imagery test?

Asking a patient to imagine playing tennis to activate motor cortex areas

What is the spatial imagery test?

Asking a patient to imagine walking through their home to activate spatial/navigation areas

What does activation in these tests suggest?

The patient may have some level of awareness or consciousness

What is locked-in syndrome?

A condition where a person is fully conscious but almost completely paralyzed

Why is locked-in syndrome not a disorder of consciousness?

Awareness and cognition are intact

What is blindsight?

A condition where individuals respond to visual stimuli without consciously seeing them

What causes blindsight?

Damage to the primary visual cortex

What does blindsight reveal about perception?

That unconscious visual pathways can guide behavior

What is unilateral neglect?

A condition where a person ignores one side of space (usually the left)

What causes unilateral neglect?

Damage to the right parietal lobe

Why is unilateral neglect not a vision problem?

Vision is intact, but attention and awareness are impaired

What is unconscious processing?

The brain’s ability to process multiple stimuli automatically without awareness

What is conscious processing?

Focused, deliberate attention on a specific task or stimulus

When is conscious processing used?

For new, complex, or effortful tasks

What is selective attention?

The ability to focus conscious awareness on one stimulus while ignoring others

What does the flashlight metaphor represent?

Attention only illuminates a small portion of available information

What is limited capacity in attention?

The brain can only process a limited amount of information at one time

Why is limited capacity important?

Prevents overload from too much sensory input

What is dual processing?

The ability to process information simultaneously on conscious and unconscious levels

What is the conscious (explicit) track?

Active thinking and awareness of tasks and decisions

What is the unconscious (implicit) track?

Automatic processes like breathing, balance, and background noise processing

What is exogenous attention?

Automatic attention captured by external stimuli (e.g., loud noise, phone notification)

What is endogenous attention?

Voluntary attention directed toward a goal (e.g., studying)

What is multitasking?

Attempting to perform multiple tasks at the same time

What actually happens during multitasking?

Rapid switching between tasks rather than true simultaneous processing

Why is multitasking inefficient?

It reduces performance and increases errors

What is task switching?

Quickly shifting attention between tasks instead of doing them simultaneously

Are frequent multitaskers better at multitasking?

No, they often perform worse

Who are supertaskers?

Individuals who can efficiently perform multiple tasks at high levels simultaneously

What is inattentional blindness?

Failing to notice a visible object because attention is focused elsewhere

What is change blindness?

Failing to notice significant changes in the environment

Why do inattentional and change blindness occur?

Because attention is limited and selective