Ch. 5 - Consciousness Flashcards

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1
Q

consciousness (2)

A
  • person’s subjective awareness, including thoughts, perceptions, experiences of the world, and self-awareness
  • ex) sleep, circadian rhythms
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2
Q

circadian rhythms (6)

A

light on retina > suprachiasmatic nucleus (SCN) > pineal gland > melatonin > drowsiness

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3
Q

what keeps us on a 24 hour cycle? (2)

A
  • entrainment: synchronization between biological rhythms and external cues
  • endogenous: rhythms: biological rhythms generated by our body that are independent of light
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4
Q

disorders of consciousness (3)

A
  • consciousness can be assessed on a spectrum of wakefulness/awareness
  • diminished brain activity as conscious awareness decreases
  • Glasglow coma scale
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5
Q

brain death (2)

A
  • condition in which the brain, specifically including the brain stem, no longer functions
  • no potential for recovery
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6
Q

coma (3)

A
  • state marked by complete loss of consciousness
  • body is still aside from minor twitches
  • no pupillary response
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7
Q

persistent vegetative state (PVS) (4)

A
  • state of minimal to no consciousness
  • eyes open but don’t track movement
  • normal sleep cycles
  • best hope for recovery before 6 months
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8
Q

evaluating consciousness in vegetative patients (4)

A
  • some PSV patients show signs of consciousness
  • fMRI techniques suggest comprehension of commands and mental imagery
  • misdiagnosis of vegetative state
  • language = consciousness?
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9
Q

minimally conscious state (2)

A
  • disordered state of consciousness marked by the ability to show some behaviours that suggest partial consciousness, even if on an inconsistent basis
  • behaviours beyond reflexes
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10
Q

locked-in syndrome

A

patient is aware and awake but because of an inability to move, appears unconscious

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