How many cranial nerves do we have?
12
How many spinal nerves do we have?
31
What is a neuron?
basic unit of the nervous system. it is one nerve cell. we have 100 billion in nervous system
What is a nerve
collection of neurons
What are the three parts of a nerve
Cell body, axon, and dendrites
Which way do axons send messages in relation to the brain
away
Which direction does dendrites send messages in relation to the brain
towards the brain
What is a synapse
space between axon of one neuron and a dendrite of another “jump”
What does the central nervous system consist of?
brain and spinal cord
What does the peripheral nervous system consist of?
any neural tissue or nerves outside brain and spinal cord
What nerves send messages toward the brain
afferent nerves
What nerves send messages away from the brain
efferent nerves
Where is the sensory information processed in the CNS?
thalamus
Where is equilibrium created in the CNS?
cerebellum
Where does the left and right hemisphere exchange information
Cerebrum
What are the only two things that are not controlled contralaterally
hearing and vison
What is the cortex?
wrinkled 1/4 in. thick covering on the hemispheres
What are the gyri
the hills
what are the fissures
the valleys
What is the corpus callosum
the largest track that connects the two hemispheres
What are the two main cortex’s in the frontal lobe
Prefrontal and motor cortex
What is the prefrontal cortex
control center of the brain. where the decision making, self control, organization, ad sensory is located
What are the four lobes of the brain?
frontal, parietal, occipital, temporal
What is the motor cortex
planning, controlling, and executing voluntary movements.
the larger the area the finer the movement
