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The skull minus the mandible (lower jaw bone). Supports facial muscles, features, protects brain.
The brain, the big, bulbous part, not the stem or cerebellum or anything.
Gray matter. Thin layer (1.5mm - 5mm thick) of neural tissue. It is gray because the nerves it is made up of lack protective myelin coating. Cerebral cortex is responsible for thinking, awareness, consciousness, reasoning, voluntary and involuntary muscle control, differentiation of somatic, visceral, and special sensory stimuli.
Recording of brain's activity obtained by using electrodes placed on the scalp.
Alpha waves / alpha rythms...
- Prominent wave pattern of an adult who is relaxed with eyes closed.
- Different parts of brain emit different alpha rhythms but they are most prominent at occipital and parietal regions.
- Females tend to have higher mean frequencies.
- Alpha wave amplitude likely to be higher in outgoing people.
- A-wave amplitudes vary with subject's attention to mental tasks performed withe eyes closed.
- Alpha waves diminish when subjects open their eyes.
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