PS101, Lec 7: 02/07/2013
How to memorize lobes of brain:
Start at the back Occipital goes visual, wrap around to the side Temporal goes hearing, go up
to the top Parietal senses, go back up to the front Frontal with its motor strip.
A)Diencephalon (two brains), with the hypothalamus for hormones and thalamus for
has 4 chemicals that enable the brain to send messages to the more advanced frontal lobe.
3.Hindbrain: Pons and Medulla, for autonomic functions.
What makes the frontal lobe more advanced?
Sulcae and gyrae folds.
Reticular formation: Arousal. Means arouse attention for things in environment. At very top, you get
midbrain surrounding theses “carrots”. Which has a
lobes of the brain
• start at the back, wrap around to the side, come back to the top, move forward
o back→ occipital→l visual system
o sid→ tempora→ hearing (auditory system )
o to→ pariet→l sensory (strip)
o forwar→ fron→a motor (strip)
o two “little” brains beneath the cortex as you go from front to back
• hypothalamus for hormones and the thalamus for relay.
Midbrai→ the “beast”
• Contains 4 chemicals that in primitive ways allow your brain to send primitive messages.
• mesencephalon Hindbrai→ pons and medulla
• Automatic (autonomic)
o Heartbeat, respiration, etc…
o don't want to damage this.
• folds and spaces
• outermost part of the forebrain responsible for analyzing sensory processing...
central fissure divides frontal lobe and parietal lobe.
• Motor strip and sensory strip.
arousal→ will you pay attention, turn towards it, eat it, fight it?
• Reticular system activates us.
• top of reticular activating system > surrounded by the midbrain, the beast that carries neurotransmitter
the more advance→ more folds.
the more cortex we have, the more text→r the more complex we can process the information.
• what primitive brain is telling more advanced brain to do.
Cocaine → drives dopamine up, forcing brain to have more messages going from
the “beast” to the most advanced brain.
• “beast” sending messages to the decision making center (frontal cortex)
o example: Jim was stealing money from his family, lying, do illegal things, etc.
most of the drugs that we use as medications for behavior→l affect sending messages from
primitive to decision making part of the brain.
dendrites (receiving end) for dopamine neurons are in the midbrain
• decides if it sends the message or not.
o Sends all the way to the nerve terminal (sending end)
o releases dopamine in the forebrain to affect your decision making. Slice of brain bathed in radioactive cocaine
• White shows you where radioactivity was s