ok im hiding out here now

PART 2 OF PART 2

LETS TALK SOME MORE ABOUT CSF IT'S CONTAINED IN THE VENTRICLES, EACH OF WHICH CONTAIN THE CHOROID PLEXUS (specialized ventricular tissues that produce CSF)

ok moving on to the ventricles lateral ventricles are the largest and irregularly shaped (there are two of them) the other ventricle is a narrow vertical cleft between the lateral ventricles the fourth ventricle lies anterior to the cerebellum look at the fuckin chart you just printed out o ya and before i forget the corpus callosum is the system connecting the 2 cerebral hemispheres

ok so whats next uhhh brain cell types i talked about neurons already; they do fuckin everything in the brain and there's like 80 billion of them then there's glia (~100 billion) which are kind of like the helpers to the neurons and they modulate their activity also "glia" is kind of like glue and thats what they act like sometimes

ok moving on to other structures in the brain lets goooooooooooo microscopic theres the nucleus WHICH IS NOT THE SAME AS THE OTHER KIND OF NUCLEUS there are nerves: large collections of axons coursing together WITHIN the CNS and there are tracts: large collections of axons coursing together OUTSIDE the CNS ok i lost my train of thought

scott if you are reading this ilysfm but go away seriously go to bed jeez

OK MORE ON THE SPINAL CORD it controls most body movements and can act independently of the brain isnt that neat there are a lot of spinal reflexes that the brain cannot inhibit aka automatic movements e.g. walking, knee-jerk (patella tendon), etc

ok now the brainstem that begins where the spinal cord enters the skull basically it produces movement and creates like a sensory "world" and there are three regions: hindbrain: evolutionarily the oldest part of the brain; contains cerebellum, reticular formation, pons, medulla, CONTROLS MOVEMENT midbrain: tectum is the roof of the midbrain, tegtum is the floor (remember stalactites and stalagmites); roof does sensory (A/V) processing, produces orienting movements; floor does eye-and-limb movements, perception of pain, and species-specific behaviors (not a concern for humans because we have little-to-none of these barring drying off?) diencephalon: HYPOTHALAMUS (four f's): feeding, sexual behavior, sleeping, temp regulation, emotional behavior, hormone function via connections w/ pituitary gland; THALAMUS: memory, motivation, integrative functions, motor processing, sensory processing

NOW THE FORE-BRAIN!!! THERE ARE THREE PRINCIPLE STRUCTURES!!!! aimee happy birthday i love you but seriously go away

neocortex: "new bark," 6 layers of gray matter, creates+responds 2 perceptual world. there is also the limbic coretex which is 3 or 4 layers of gray matter and that basically controls motivational states basal ganglia: collection of nuclei, controls voluntary movement; related disorders: parkinson's, tourette syndrome limbic system: group of structures b/w neocortex and brainstem; spatial navigation (wow random), emotional/sexual behaviors and behaviors that create and require memory........ blah blah hippocampus and amygdala are here

anyway lets go back to the 4 lobes frontal: sensory and motor functions, planning parietal: tactile occipital: vision temporal: visual, auditory, gustatory (taste)

zzzzzzz so tired so lets just establish some final notes there are 8 principles of nervous system function sequence of brain processing is: in->integrate->out many of the brain's circuits are crossed the brain is both symmetrical and asymmetrical the NS works both through excitation and inhibition the CNS functions on multiple levels brain systems are organized both hierarchically and in parallel aaaaaaand functions in the brain and both localized and distributed

ok naptimeeeeeeee qq i did so little Q_Q god i dont love this anymore i hate it HATEEEEEEE