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Chap 2. Neuro Anato
| Term | Definition |
|---|---|
| Neuron | A nerve cell; Building blocks of nervous system |
| Dendrite | The bushy, branchy extensions of a neuron that receive messages and conduct impulses toward the cell body |
| Axon | The extension of a neuron; Messages pass to other neurons or to muscles or glands |
| Myelin | A layer of fatty tissue sentimentally encasing the fibers of many neurons; educes greater transmission speed of neural impulses as one node to another |
| Action potential | A neural impulse |
| Threshold | The level of stimulation required to trigger a neural impluse |
| Neurotransmitters - Behavior | Chemical messengers that traverse the synaptic gaps between neurons |
| Endorphins | "morphine within" - Natural neurons linked to pain control and pleasure |
| ACH - Acetylcholine | Enables muscle actions, learning, and memory MEMORY |
| Dopamine | Influences movement, learning, attention, and emotion EMOTION |
| Serotonin | Mood, hunger, sleep and arousal MOOD |
| Norepinephrine | Helps control alertness and arousal AROUSAL |
| GABA | A major inhibitory neurotransmitter |
| Glutamate | A major excitation neurotransmitter, involved in memory |
| Hypothalamus | Hunger and sex |
| Amygdala | Motion |
| Hippcampus | Memory |
| Thalamus | Relay center - controls direction |
| Cerebellum | Movement and balance |
| Medulla | Heart rate breathing |
| Primary motor area | Movement |
| Primary somatosesnsory area | Sensation |
| Frontal lobe | Inhibit inappropriate impulses |
| Parietal lobe | Body sensation |
| Temporal lobe | Hearing |
| Occipital lobe | Vision |
| Brocas Area | Speech, (left hemisphere) |
| Wernicks Area | Interpreiting audio, talking |
| Corpus Callasum | Axon connecting both hemispheres |
| CT scan | Computed tomography |
| PET scan | Positron emission tomography |
| MRI scan | Magnetic resonance imaging |