Alright, so for this one, we're going to be looking at these 2 EEGs and we're going to be figuring out what stage of sleep we are looking at and we're going to take note of any particular key features that helped us to make that determination. Alright, so starting with our first EEG here. So one thing I'm noticing about this right away is that this is pretty high amplitude, right? We have a lot of really high amplitude waves happening here and it's happening pretty consistently so this seems to be a really consistent feature within this EEG. I'm also noticing that compared to many of the other EEGs that we saw in our lesson, this is relatively low frequency.
We're not seeing a huge amount of wave cycles within any particular unit of time here, right? So those two things in combination tell me that we are probably looking at stages 3-4. We're looking at some delta waves here, and I can tell that because of the very high amplitude and the relatively lower frequency. Alright, so that is our first wave. Now looking at our second wave, so I think obviously our eyes are going to be drawn right away to this really high amplitude spike there, and as we can see, the rest of this wave is not high amplitude so this is not characteristic of the wave as a whole, which tells me that this really high amplitude spike is probably a K complex.
Right? I'll write that down. We're noticing a K complex, and then looking at this wave I also notice right here we have this kind of burst of really high frequency activity. So compared to the EEG that kind of bookends it on either side, you can see we're cycling through a lot more full wave cycles within this unit right here, so it's a very high frequency burst. So that is probably a sleep spindle, right?
So I'm just going to abbreviate that as SS and if we're seeing K complexes and sleep spindles we are looking at stage 2 of sleep, right? So there you go. That's my favorite to ID because they're so easy. I love those nice obvious K complexes, they make it so nice. Alright, and then finally we have C, what stage would be the most difficult to distinguish from being awake on an EEG?
So if we are awake, we are going to have those beta waves, pretty high in frequency, pretty low in amplitude, and that is also what our REM EEG looks like. Right? So very, very interesting and we will talk about some theories of this a bit later, but our REM EEG is going to look very similar to our beta waves that we would see when we are awake. Alright, so there you guys have it, and I will see you in the next one. Bye bye.