Lecture 3 Flashcards
what do CT scans and MRIs do
provide high resolution views at structures in the CNS
what do functional MRIs and PET scans do
provide real time info about which components of the CNS are active during tasks
what does an EEG do
indicated electrical activity generated in regions of the CNS, whereas intracellular recordings of single neurons can provide info about the type of signals a single cell sends or responds to
what does a knock in/out experimental model do
by adding in or removing genetic codes one can observe changes in cell function or animal behavior
what does immunohistochemistry/PCR/western blots do?
cell and membrane components, receptor and NT types can be identified for single cells and/or regions of the brain identified for single cells and/or regions of the brain
what do optogenetics do
insertion of channels into a group of cells that are activated by a laser
what does the type of communication between neurons depend on
type of neurotransmitter and type of NT receptor
where is the NT located
on presynaptic neuron
where is the NT receptor located
on postsynaptic neuron
what are the types of summation
spatial and temporal
what occurs in spatial summation
synaptic input from different axon arrive simultaneously at different portions of the dendrite or soma which are all added together to either bring the cell to threshold for AP or not reaching threshold
what occurs in temporal summation
multiple synaptic inputs from one neuron over short period of time. it increases the likeliness or prevention that post synaptic cell will reach threshold
where is the motor command sent from
primary motor cortex and transmitted to relevant muscles by motor neurons
what is the path of the motor neuron
first motor neuron originates in the primary motor cortex then synapses on motor neurons in the spinal cord, the 2nd motor neuron exits the cord, innervating a specific set of muscle fibers forming motor units
what does a motor unit consist of
a motor neuron and all fibers it innervates
