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Description:

AP Psychology 2.3 States of Consciousness. What is the suprachiasmatic nucleus?

Language:
English Language

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-

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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