nervous system Flashcards
What are the 2 portions of the Nervous System
Central Nervous System and Peripheral Nervous System
What are the parts of the CNS
Brain and spinal cord
What are the parts of the PNS
Cranial Nerves and Spinal Nerves
what are the components of the Cranial and Spinal Nerves
Sensory and motor
What are sensory nerves
afferent, sensory neurons and receptors
What are motor nerves
efferent-muscles and glands
List 2 parts that are part of the motor nerves
ganglia and sensory receptors
What is the Longitudinal fissure
a separation seen in the brain that divides the 2 lobes
where is the girus
under the corpus collosum
what is the corpus callosum
connects the right and left hemisphere
what does the medulla oblongate do
controls the cardiac and respiratory areas
what connects the spinals cord to the brain
pons of the brain
what is the sulcus
it is the black/wrinkled looking portions in the brain
The spinal cord is protected by connective tissue that is made up of??
vertebra and meninges
The meninges in the spinal cord have 3 layers, what are they
dura mater, arachnoid, and pia mater
The pia mater is what portion
it is the innermost layer (its soft) of the meninges
What is the arachnoid
It is the middle-vasculature layer of the meninges of the spinal cord
what is the dura mater
it is the outermost tough layer of the meninges of the spinal cord
Where is CSF produced
in the brain
These conduct impulses down the spinal cord
motor tracts (descending
these conduct nerve impusles toward the brain
Sensory tracts (ascending)
what are the 2 layers of the cerebellum
cerebellar cortex and cerebellar medulla
what are the two layers in the cerebellar cortex
molecular layer and granular layer
what does the cerebellar medulla look like?
looks like a tree, and the way it branches is termed “arbor vitae”
what is the function of the cerebellum
coordinates all voluntary muscle movements, skilled movements, posture, and equilibrium
What are the functional units of the the nervous system
neurons
what are the nerve cells called
neurons
what are the supportive cells of the nerve cells called
neuroglia
what are the 4 types of neuroglia
astrocytes, oligodendrocytes, microglia, and Schwann cells
These form blood brain barrier, repair brain injuries and scar formation
astrocytes
these produce myelin
oligodendrocytes
these are phagocytes
microglia
these, along with oligodendrocytes produce myelin
Schwann cells
what traps the message in the neuron
the dendrites
where does the info come out of in the neuron
axon terminal
when the neuron has Schwann cells what happens with the message
it travels faster
another name for the spinal nerve is what
the peripheral nerve
this is found around the individual axon
endoneurium
this is found around the fascicle
perineurium
this is found around the entire nerve
epineurium
