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ORGANISATION OF THE NERVOUS SYSTEM (3 POSSIBLE ROUTES FOR INFORMATION…
ORGANISATION OF THE NERVOUS SYSTEM
two concepts
for subdividing nervous system
ANATOMIC DIVISIONS
peripheral nervous system (PNS)
comprised
of all the neurons
are at least
partially outside
of the 2 organs
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central nervous system (CNS)
comprised of the neurons
that are entirely confined
within the brain
and spinal cord
FUNCTIONAL DIVISIONS
this classification
is based
on the source
of sensory information
as well as
the type of response
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divided
somatic nervous system
responsible for sensory and motor
function
under conscius control
might be voluntary
autonomic nervous system
responsible por regulation
and the responses in this system
are made up of
parasymphatic
sympathetic
3 POSSIBLE ROUTES FOR INFORMATION CARRIED BY THE NERVOUS SYSTEM
motor pathways
carry messages
from the CNS
to effectors
sensory pathways
move information
from the sensory organs
to the CNS
combined pathways
complete both
sensory and motor functions