Neurophysiology, Developmental Neuropsychology, and the Supporting Players (Subcortical Structures) Flashcards
reason for weight gain in the brain
myelination
Depolarization
Increases likelihood of neurons to fire (MORE LIKELY)
Hyperpolarization
Decreases likelihood of neurons to fire (LESS LIKELY)
Neurons firing is a…
All or nothing process. Need sufficient stim to fire
Myelin Sheath…
Increases neuron transmission (speeds up). Allows action potential to happen once @ nod of Ranvier.
Dendritic spines (POST synaptic membrane)
START of cell (synaps) S & S
Axon terminal ( PRE synaptic membrane)
END of cell ( Button)
Graded Potentials…
Add or subtract through neurotransmitters (excite or inhibit neurons)
at -50 mV a neuron will
reaches threshold of excitation and will FIRE (goes to +40 mV.
After action potential
comes down
Refractory period (hyperpolarization)
Resting period, neuron becomes more negative
Gray Matter (neuron cell bodies, blood vessels)
“houses/ buildings” (store things)
Gray matter is most common in the….
LEFT hemisphere
Gray matter is important for…
Learning formal and informal experiences and education. “stores things”. What we HAVE learned.
White matter is most common in the….
RIGHT hemisphere
Many myelins grouped together….
Tract (think highway)
White matter is important in….
Making new connections & Learning. Novel (new) learning & problem solving.
Action potential is
formed between myelin @ NoR & speed transmission
People with white matter problems….
do not make connections. critical for bringing ides together. modify behaviors ( imp. in social practice)
sometimes math issues
People with Gray matter problems…
difficulty remembering
Psychpharmacology
study of drugs on synapes in brain
Prozac and SSRI’s…
Block transporters = drugs stay in system (stimulants)
