What is a large mass of neurons deep in the brain?
nucleus
celarly defined small groups of neurons
locus
poorly defined group of neurons in CNS
substantia, (substantia nigra)
collection of neurons in PNS
ganglion
collection of common origin and destination
tract
collection of axons that connects one side of brain to other
commisure
ribbon like collection of axons smaller than tract
laminiscus
3 main divisions of nervous system
CNS,PNS, autonomic
autonomic NS divisions
sympathetic and parasympathetic
primary functions of NS
recieve or collect information
process or integrate
respond
2 main components of afferent NS
somatic ns
visceral NS
2 main components of motor or efferent NS
somatic and autonomic
2 main types of cells in nsn
neurons and glia
type of cell in ns capable of mitotic activity
glia
specialized parts of neuron 5
axon, dendrites, stroma, synaptic cleft, telodendria (interneurons)
neurons classified
by shape and # of attachments to cell body
multipolar
most common neuron
multipolar found in
special senses
unipolar found in
afferent
most common type of funtional neuron, not sensory
interneurons
wallarian degeneration
injury to neuron, axon is reabsorbed, neural tube regenerates axon
near end of axon injury
chance of regenerating is good
middle of axon injury
chance of regeneration is bad
what part of astrocyte forms bbb
foot processes
function of epindymal cell
production of csf
small cell similar to macrophage in cns
microglia
neurons in ganglia separated and supported by
satellite cells
epi, peri neuria
know where they occur
cerebrum, cerebellum, brainstem, diancephalon
parts of brain
principle difference between brain and spinal cord
in brain, gray matter outside
in spinal cord gray matter inside
largest portion of brain
cerebrum
complex functions carried out in brain
in cerebrum
largest connecting tract in brain
corpus collosum
structure that separates hemispheres of brain
longitudinal fissure
what separates cerebrum from cerebellum
transverse fissure
name of structure that lines the fissrue and separates cerebellum
tentorum
how many lobes of brain
5 lobes
frontal
insula
parietal
occipital
temporal
what separates frontal and parietal lobes
central sulcus
what structure separates temporal lobe and frontal and parietal lobe
lateral sulcus
all lobes have these 3 functions
sensory motor and association
what are does speech
brocas area, parietal lobe L side
taste cortex is found in
insula
two folds of brain next to eachother, connected by
arduet fibers
longitudinal fasciculi do
connect multiple lobes
internal capsule and corona radiata
projection tracts
basal ganglia function
motor control
medulla runs
sympathetic nervous system
cranial nerves in pons
5-8
brainstem connection to cerebellum
peduncles
sympathetic nervous system
thoracolumbar
parasympathetic nervous system
craniosacral
upper motor neuron
brain to the cord
lower motor neuron
cord to the periphery (effector)