EXAM 3: CHAPTER 6 Flashcards
2 components of consciousness
- State of consciousness: Level of awareness of our external surroundings and internal states
- Contents of consciousness: Specific thoughts we are aware of about our internal states or external surroundings
Is attention and consciousness always related
No, they are closely related but can have one without the other (eg. mind wandering)
Different forms of consciousness (9):
- Daydreaming
- Drowsiness
- Dreaming
- Hallucination
- Orgasm
- Food/oxygen starvation
- Sensory deprivation
- Hypnosis
- Meditation
Damage to the reticular formation results in..
Loss of consciousness
Damage to the hypothalamus results in..
Disturbances of wakefulness
Damage to the thalamus results in..
Lack of conscious awareness
Damage to the cerebral cortex results in..
Lack of awareness
3 levels of consciousness:
- Full consciousness
- Self consciousness
- Minimal consciousness
Full consciousness
Consciousness in which you know and are able to report your mental state
Self-consciousness
Distinct level of consciousness in which you’re aware of one’s self, actions and image (eg. Recognition of self in mirrors by humans and animals)
Minimal consciousness
A person who shows clear but minimal or inconsistent awareness is classified as being in a minimally conscious state
Preconsciousness
Level of awareness in which information can become readily available to consciousness if necessary (eg. What did you do last weekend?)
Automatic behaviors
Type of behavior that is performed without conscious self-control and with partial or total loss of memory (eg. Putting objects elsewhere where it doesn’t occur)
Unconscious state
State in which information is not easily accessible to conscious awareness (eg. What did you eat last weekend?)
Freud’s 3 levels of the unconscious:
- Conscious
- Preconscious
- Unconscious
Freud’s theory on unconsciousness
Unconsciousness is a repository for socially unacceptable ideas, wishes, desires, traumatic memories, or painful emotions put out of mind by the mechanism of psychological repression
2 main types of memory:
- Explicit memory: Involves pieces of knowledge that we are fully aware of
- Implicit memory: Knowledge that we have stored in memory that we are not typically aware of or able to recall it with
Lethargy
Brain fog, cannot think clearly and feel tired
Stupor
Unresponsive but can be aroused briefly by pain
Coma
Unconscious, unresponsive, unarousable
Vegetative state
Unresponsive to psychological and physical stimuli, have a sleep/wake cycle, often eyes open
PVS
Awareness of self and environment is absent
Locked in syndrome
Awakens from coma and is completely conscious but paralyzed and can only blink
Brain dead
No brain function so no consciousness. Basically dead
Adaptive theory of sleep
Theory that organisms sleep for the purpose of self-preservation to keep away from predators
Restoration theory
Idea that sleep restores our brains and bodies
Circadian rhythm (biological clock)
Pattern of sleep-wake cycles that in human beings roughly corresponds to periods of daylight and night
Physiological pathway of the biological clock:
Light levels —> retina —-> suprachiasmatic nucleus of hypothalamus —> pineal gland —> secretion of melatonin
How we learn about sleep/dreams (3):
- Monitor EEG/brain waves and muscle movements during sleep
- Expose the sleeping person to noise and words, then examine the effects on the brain and mind
- Wake people and see which mental state (eg. Dreaming) goes with which brain/body state
Stages of sleep (5):
- Stage 1: Bridge between wakefulness and sleep - alpha waves change to slower theta waves
- Stage 2: More relaxed and rhythmic breathing - sleep spindles
- Stage 3: Deep sleep - 20-50% delta waves
- Stage 4: Heart rate, blood pressure, breathing rates at lowest level and muscles relax
- Stage 5: Rapid eye movement
Rapid eye movement (REM) sleep
Stage of sleep associated with rapid and jagged brain wave patterns, increased heart rate, rapid and irregular breathing, rapid eye movements and dreaming
Average of a 15-20 year old’s sleep
8.5 hours a day
Average of an elderly’s sleep
Under 6 hours
Why do we sleep? (7):
- Protective role in human evolution
- Brain restoration and repair of damaged neurons
- Store and rebuild memories of day’s experiences
- Encourages growth through pituitary gland secretion of growth hormone
- Memory consolidation
- Enhance problem-solving abilities
- Brain removes waste
Poor sleep is linked to ___:
Dementia and TBI. And the dysfunction of the waste removal system
Nightmares
Dreams filled with intense anxiety
Dream disorder anxiety
Frequent or distressing nightmares
Lucid dreams
Sleeper being able to fully recognize that they are dreaming and occasionally actively guides outcome of dream
Daydreams
Fantasies that occur while one is awake and aware of external reality but is not fully conscious
Effects of sleep deprivation (5):
- Fatigue
- Impairment of concentration, creativity, communication
- Obesity, hypertension, suppressed immune system
- Irritability and slowed performance
- Affects attention, memory, reaction time, decision making, motor coordination, immune system, emotional regulation
Insomnia
Most common sleep disorder. Difficulty in falling asleep or staying asleep
Sleep apnea
Second most common sleep disorder. Person stops breathing for brief periods while asleep
Somnambulism
Occurs when the person arises and walks around during sleep
Narcolepsy
Falling asleep uncontrollably. Loss of unconsciousness that can last up to 15 minutes. Can sometimes lose muscle tone which is extremely dangerous if you are driving