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AP Psychology 2.3 States of Consciousness. What is the suprachiasmatic nucleus?
Transcript
- 00:03
And here's your shmoop du jour brought to you by the
- 00:05
suprachiasmatic nucleus not to be confused with the [Mary Poppins holding an umbrella]
- 00:11
supercalifragilisticexpialidocious nucleus which yeah doesn't exist.. Okay
- 00:16
here's our question what is the suprachiasmatic nucleus, and here are your potential
- 00:22
answers...Alright well if you don't know what the schmoop-a-
Full Transcript
- 00:29
suprachiasmatic nucleus is, well we'll give you a hint it has to do with sleep too [Girl sleeping]
- 00:36
bad you can't really tell that by the name much like the word corn dogs [Girl taking a corn dog for a walk in park]
- 00:39
wouldn't eat one of those for years okay well anyway let's run down exactly
- 00:44
what each of our answers is referring to until we find the one we're looking for
- 00:47
start with B) is the suprachiasmatic nucleus a series of brain waves that signal
- 00:54
fatigue, well let's see - we have five types of brain waves gamma, beta, alpha,
- 00:58
theta and delta all naturally produced in varying quantities throughout the day [Examples of varying brain waves]
- 01:03
and typically signaling different things the short ones that signal drowsiness
- 01:06
those would be the theta waves, not a suprachiasmatic nucleus so B) is not our
- 01:12
answer and while we're on the top of the waves let's bring up E) in contrast to [Person surfing on a wave]
- 01:16
the short theta waves the tall waves that suggest wakefulness are the beta
- 01:20
wave well between theta waves beta waves and three others there's simply no
- 01:24
suprachiasmatic waves, so E) is out too what about C) is a suprachiasmatic [Beta wave talking to a sleepy theta wave]
- 01:30
nucleus a gland that produces melatonin a naturally occurring hormone that helps
- 01:35
you control your sleep and wake cycles well while melatonin is produced by
- 01:40
various tissues in the body the primary manufacturer is the pineal gland in the [pineal gland highlighted in the brain]
- 01:44
brain not the suprachiasmatic nucleus and therefore not our answer moving on
- 01:49
to D) well actually looks like we've got that one covered as well again the
- 01:53
pineal gland produces melatonin not the suprachiasmatic nucleus like not at all
- 01:57
that leaves us with A) is the suprachiasmatic nucleus a grouping of
- 02:01
cells located in the hypothalamus that controls sleep patterns while the SCN [Man digging crops]
- 02:06
control sleep patterns and works with environmental clues
- 02:09
order to determine an appropriate sleep schedule it also controls our circadian [Man with a clock on his forehead ticking]
- 02:13
rhythm or in other words our body's internal clock... Well, a clock that tells
- 02:18
us when it makes sense to go to sleep which is really just a suggestion is what
- 02:23
it is but no need to listen to it we can stay up watching youtube videos till 4am [Man watching videos at 4am]
- 02:26
and still feel fresh as a daisy by seven right? [Man turns into a zombie and walks away]
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