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Neurology/Psychbio
Question | Answer |
---|---|
What does neuroscience focus on? | the main building blocks of the brain |
what are the three types of neurons and what do they do? | sensory - gather sensory information. motor - communicate information between muscles. interneuron - communicate information between the brain and spinal chord; connect sensory and motor neurons together |
what is the function of glia cells? and name a few | to help support neurons. astrocytes (create blood brain barrier, help heal brain damage) oligodenroglia (provide myelin to speed up transition of neurons) microglia (clean up dead cells to prevent infection in the brain) |
what is resting potential? | when a neuron is a rest. there is a negative charge inside and a positive charge on the outside |
what is action potential? | sudden positive change in the electrical charge of a neurons axon. aka "spike". involved in transduction |
what is the purpose of the amgyglada | it is involved in recognizing, learning about and responding to stimuli that induce fear. it is also referred to as the temporal lobe |
how have people with brain damage and EEGs contributed to psychology? | patients with localized brain damage have loss of some functions, which scientist have been able to detect with neuroimaging and connect the function |
what happens in a post-synaptic electrical event? | if its excitatory, then the postsynaptic cell will become depolarized, less negative and more likely to fire. if it is inhibitory, then the cell will become hyper polarized, more negative, and less likely to fire an action potential. |
give examples of neuroimaging techniques | the CT, PET, MRI, fMRI, EEG |
what causes brain growth to occur rapidly? | myelination and increases in neural connections |
action potential triggers the release of what? | neurotransmitters |
what is plasticity? | the repetitive release of neurotransmitters that can cause permanent change to the neuron |
what is the neuronal impulse speed | about 260 miles an hour |
what is reciprocal inhibition | when stimulation of some neurons cause others to relax (ie, biceps fire, triceps relax) |
repeated stimulation of the same neuron is likely to result in | temporal summation |
what's the difference between pre-synpatic and post synaptic cells? | pre sends the message post receives |
what is the function of the spinal chord and what system is it a part of? | it gathers information from the body and sends it to the brain. it also enables the brain to control movement. it is part of the central nervous system |
what is the function of the medulla, and what is it also known as? | the medulla is important for respiration and heart rate regulation. it is also known as the brain stem, and is closes to the spinal chord |
what is the reticular formation? | nuclei in the brain that work together to regulate sleep and wakefulness. also the major source of serotonin |
what is serotonin involved in? | regulation of mood and activity levels |
what are pons and where is it located? | a region in the brain above the brainstem. the neuros use norepinephrine which is important for arousal and attention. this part of the brain also contains cell groups such as the locus coerulus that belongs to reticular formation |
what is the function of dendrites? | to carry information to the cell |
what part of the brain is responsible for motor coodination? | the cerebellum |
what is the substanial nigra | it is collectively known as the midbrain and produces the neurotransmitter dopamine. it is important for movement too |
what is the hypothalamus responsibile for? | basic motivations such as eating, drinking, sex and maternal behavior. also critical for the control of the endocrine system. |
the adrenal glands produce hormones to respond to what type of situation? | stressful |
what is the function of the hippocampus? | learning and memory. learning about ones spatial environment. |
what is an episodic memory? | a memory of an event |
what is the function of the striatum? | to work with the substantia nigra to produce fluid movement |
what part of the brain is important for motivation and reward learning? | the nucleus accumbens. |
what is the neocortex responsible for? | complex behaviors such as language and thought. |
what is the neocortex subdivided into? | occipital, temporal, parietal and frontal lobe. |
multiple sclerosis | results from demyelination |
amyotrophic lateral sclerosis (ALS, lou gehrigs disease) | loss of motor neurons in the spinal chord. begins with localized muscle weakness and then the entire body is affected |
what is parkinsons disease a result of? | loss of dopamine neurons which causes tremors and dementia |