Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Perception Of Time

6,144 views

Published on

A presentation on the various dimensions of the human perception of time, covering the psychological, biological and genetic basis.

  • Be the first to comment

Perception Of Time

  1. 2. 8
  2. 3. 7
  3. 4. 6
  4. 5. 5
  5. 6. 4
  6. 7. 3
  7. 10. TIME Perception of Surabhi Gupta
  8. 11. It is not the river that flows but the water. Not the years that go by, but ourselves. - Hevré Bazin
  9. 12. Perception of Time: outline <ul><li>Sense of time is non-linear; it is three dimensional: </li></ul><ul><ul><ul><li>Psychological </li></ul></ul></ul><ul><ul><ul><li>Genetic </li></ul></ul></ul><ul><ul><ul><li>Biological </li></ul></ul></ul><ul><li>Applications of Research in this area </li></ul><ul><li>Transcending Death! </li></ul>
  10. 13. 205 days in an underground cave <ul><li>In 1972, under observation of NASA scientists, Michael Siffre went underground (literally). </li></ul><ul><li>‘ What happens if nothing happens?’ </li></ul><ul><li>He spent most time sitting in the dark </li></ul>
  11. 14. The counter in our psyche <ul><li>In his ‘mind’, time had slowed down </li></ul><ul><li>Reports indicate: </li></ul><ul><ul><ul><li>His day lasted for 24.5 hours </li></ul></ul></ul><ul><ul><ul><li>16 were spent awake </li></ul></ul></ul>
  12. 15. Suprachiasmic nucleus (SN) <ul><li>‘ above’ [optic] ‘chiasma’ in the hypothalamus </li></ul><ul><li>Circadian Clock </li></ul><ul><li>Synchronizes to cues called zitetegabers. </li></ul><ul><li>Neural path is the Retinohypothalamic Tract </li></ul>
  13. 16. Where did it go? Time is motion <ul><li>Psychological time is derived from intervals between events </li></ul><ul><li>Muscle synchronization by basal ganglia </li></ul><ul><li>In Japanese Tea ceremony every detail of tea-making is prolonged & becomes an event in itself. </li></ul>
  14. 17. Time is relative <ul><li>&quot;Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. THAT'S relativity.&quot; </li></ul><ul><li>- Einstein </li></ul>
  15. 18. Tick-Tock genes <ul><li>Experiment with Euglena </li></ul><ul><li>Four genes activate and </li></ul><ul><li>deactivate in a 24-hr cycle </li></ul><ul><li>Cell division and metabolism also coordinated with the circadian pacemaker. </li></ul>
  16. 19. Biological time <ul><li>Pineal gland controls sleep and waking rhythms </li></ul><ul><li>It releases the hormone, melatonin to regulate cycles at the tissue level </li></ul><ul><li>Neurotransmitters like beta-endorphin and serotonin influence perception of time </li></ul>
  17. 20. The Dracula hormone <ul><li>Melatonin production: </li></ul><ul><ul><ul><li>Inhibited by light </li></ul></ul></ul><ul><ul><ul><li>Stimulated by darkness </li></ul></ul></ul><ul><li>Triggers seasonal breeding in animals </li></ul><ul><li>In humans, helps set the biological clock </li></ul><ul><ul><li>A small dose of melatonin </li></ul></ul><ul><ul><ul><li>Given in morning : delays the clock </li></ul></ul></ul><ul><ul><ul><li>Given in afternoon/evening : advances the clock </li></ul></ul></ul>
  18. 21. (En)lightening knee <ul><li>Biological rhythm markers: </li></ul><ul><ul><ul><li>Body core temperature </li></ul></ul></ul><ul><ul><ul><li>Rise in melatonin </li></ul></ul></ul><ul><li>Light shown on the back of knee advanced biological clock by up to 3 hours </li></ul>
  19. 22. Applications <ul><li>Knee straps to fight jetlag </li></ul><ul><li>Timed drugs </li></ul><ul><li>Melanin and Vitamin B2 used to treat </li></ul><ul><ul><ul><li>Sleep disorders </li></ul></ul></ul><ul><ul><ul><li>Seasonal depression </li></ul></ul></ul><ul><ul><ul><li>Jetlag </li></ul></ul></ul><ul><li>Why is asthma is the most severe at night? </li></ul>
  20. 23. Transcending death <ul><li>Suprachiasmic is Supra-charismatic </li></ul><ul><li>After death, the suprachiasmc nucleus continues to emit pulses </li></ul><ul><li>The departed self pays a last, gracious tribute to the fascinating enigma, time . </li></ul>

×