I don't really do much to be honest. I like to have fun, hang out with my beautiful, amazing friends and listen to music. I could bullshit about other things, but honestly I'm not that interesting. Staring at the sky and thinking is something I find myself doing most nights. Oh, and I play drums a lot. I think I'm in a band - I'm not sure.

Most of the time I'm asleep or daydreaming, and I never stop talking about music, and I have a bad habit of wandering off in uncomfortable situations, or if im just bored. I love songs that last over 10 minutes and good conversation with people I've just met. I like nice people and nice people usually like me.


Explain myself... I read a phrase in a magazine once, "an ear for the exotic and a taste for the quixotic"; i guess i'd go with that. Yeah.


Other than that, Obsessed with music (always humming something) and usually stressing over last minute work at very late hours in the evening/morning. I'm a pretty humble guy, and I like to keep my head down and listen a lot. The things I come out with though can be pretty zany and out-there, but thats just cause I think too much. I don't really like who I was much anymore, but I'm beginning to like who I'm becoming.

11th January 2010

Post

Psychology

Been reading about biological rhythms for less than a minute and I’m already confused…

Circadian rhythms

These are rhythms lasting ‘about one day’. The best example of a circadian rhythm is the sleep-wake cycle, associated with which are many cyclical changes with active and dormant periods, for example body temperature and urine production. These rhythms allow animals to prepare for predictable daily environmental changes, such as night and day.

Research has involved participants being deprived of possible zeitgebers (‘time-givers’) like sunrise and sunset, temperature changes during a 24 hour period and wristwatches! Participants tend to maintain a cyclical rhythm but it extends to about 25 hours (Siffre, 1975).

So, endogenous pacemakers can keep a rhythm but exogenous zeitgebers are needed to stick to a 24 hour rhythm.

Where is the brain’s internal clock?

The suprachiasmatic nucleus (SCN) in the hypothalamus is a bundle of nerves with an inbuilt circadian rhythm. This is a particularly important endogenous pacemaker. Evidence for this comes from studies in which the SCN has been cut in hamsters to result in disrupted circadian rhythms (Menaker et al., 1978).

What keeps the brain to a 24 hour rhythm?

Without light the brain’s day would be 25 hours long (a free-running clock). Light is a very important zeitgeber - flashes of light are enough to ‘reset’ the internal clocks of animals living in the dark (Aschoff, 1979). One blind man needed to take stimulant and tranquilizing drugs to maintain a 24 hour cycle!

How does light ensure mammals maintain a 24 hour rhythm?

The pineal gland in the brain converts the neurotransmitter serotonin into the hormone melatonin.

Melatonin is released into the blood stream and causes rhythmic changes around the body. Although the need for sleep is not affected by light, melatonin plays a role in the coordination of the sleep-wake cycle.

(Words are too big and confusing - I hope this doesn’t come up on a test.)