lecture 1 Flashcards
Why do we have a nervous system
- proccess info
- uses info to cundoct behavior
the central nervous system
interagated and transforms information
basic model of the nervous system
what is the stimulus?
what sensory receptors are activated
what is the transformation where in the nervous system does it occur
what effectors produce the response
what is the response
what makes up the nervous system
50% nuerons
50% glial cells
glial cells
- provide support/ structure
- supply nutrients and oxygen
- insulate neurons
- clean up debris
oligodentryctes and schwann cells whrere they found
oligodentrocytes in CNS
Schwann cells in PNS
post-synaptuc potential
a graded electrochemical responce
action potential
all or nothing electrochemical response
convergence of psp=
integration
ipsp - inhibitory post synaptic potential
hyperpolirization difficult to activate a membrane
EPSp - exitotory spot synaptic potential
depolirization occurs and activation of a membrane
white mater
inside brain
putside spinal cord
bundles of myelinated axons
the pathway of fiber tracts connection areas of greymatter
grey matter
groups of cell bodies, dentrites and terminal endings (no mylinated axons)
outside brain inside spina cord
the site of integration and transformation
the brackets in the peripheral ns
autonomic ns
somatic ns
entric ns
brakets in the autonomic ns
sympathetic ns (fight or flight)
parasympethatic ns (rest and digest)
entric ns
gastrointestial tract digestion and all
brackets in the brain
hind brain
mid brain
forebrain
hindbrain
functions fundemental to survival
midbrain
oculomotor control, basic auditory and visual integration
forebrain
complex, preceptuon, voluntary movement, cognition
spinal cord
fibre tract
entry and exit zones to/fro pns
pools of internuerons that ineract with ascending and descending projections
brainstem
pons and medula of the hindbrain
12 cranial nuclieand sensory motor nerves
nuclie in the brainstem
critical to autonomic functions, alertness, eye and head movement
