Brain Activity Flashcards
Electrical patterns observed on an EEG.
Brain Waves
A printed report of the electrical activity of the brain.
Electroencephalogram (EEG)
Occur in the brains of healthy, awake adults who are resting with their eyes closes.
Alpha waves
Higher-frequency waves that appear in people who are concentrating on a task, under stress, or in a state of psychological tension.
Beta waves
Brain waves that appear transiently during sleep in normal adults.
Theta waves
Brain waves normally seen during sleep.
Delta waves
Encompasses perception of sensations, voluntary initiation and control of movement, and capabilities associated with higher mental processing.
Consciousness
Part of sleep that occurs in four stages.
Non-Rapid Eye Movement (NREM) Sleep
Occurs after the fourth stage of NREM has been achieved. Vital signs increase, skeletal muscles (except ocular muscles) are inhibited. Dreaming takes place.
Rapid Eye Movement (REM) Sleep
Relaxation begins. EEG shows Alpha Waves
Stage 1 NREM
EEG is irregular with sleep spindles.
Stage 2 NREM
Sleep deepens. Theta and delta waves appear.
Stage 3 NREM
EEG is dominated by delta waves.
Stage 4 NREM
Neurological disorder characterized by extreme daytime sleepiness and sudden attacks of sleep.
Narcolepsy
Chronic inability to obtain the amount or quality of sleep needed to function adequately during the day.
Insomnia
Temporary cessation of breathing during sleep.
Sleep Apnea
Becomes inactive during sleep, preventing motor activity by preventing stimuli from reaching the spinal cord.
Locus Coeruleus
The storage and retrieval of information
Memory
Fleeting memory of the events that continually happen
Short-Term Memory
Memory that is retained
Long-Term Memory
Entails learning explicit information. Involves the hippocampus, amygdala, thalamus, hypothalamus, ventromedial prefrontal cortex, and the basal forebrain.
Fact Memory
Motor activity acquired through practice. Involves the corpus striatum, premotor and motor cortexes.
Skill Memory
Define electroencephalogram.
A printed record or graph of the electrical activity of the brain.
Name and describe the four wave types associated with an EEG.
- Alpha waves: characteristic of normal resting adults.
- Beta waves: characteristic of a person who is concentrating.
- Theta waves: observed in children and frustrated adults
- Delta waves: found in a person who is sleeping deeply, in infants, or in people with damaged portions of the brain.
