Psychology MCAT Flashcards
Wernicke’s area
part of temporal lobe; LANGUAGE COMPREHENSION
Broca’s area
part of frontal lobe; SPEECH
Components of brainstem
midbrain, medulla oblongata, pons
Reticular activating system (RAS)
part of brainstem; modulates alertness and arousal
Inferior and superior colliculi
(part of midbrain)
- Inferior colliculi process auditory input
- Superior colliculi process visual input
Substantia nigra
(part of midbrain)
- midbrain dopaminergic nucleus
- produce dopamine to help coordinate voluntary movements
- In Parkinson’s disease, dopaminergic neurons in this region degenerates.
SAME DAVE
Sensory neurons are Afferent neurons
Motor neurons are Efferent neurons
Dorsal (back) location for Afferent neuron (sensory)
Ventral (abdomen) location for Efferent neurons (motor)
Tip: Afferent = send info up to brain or spinal cord for processing
Efferent = neurons that make effect (action)
Tunnel vision
Focus just on objects within your central field
- part of fight-or-flight response (by sympathetic nervous system) to acute stress
Electroencephalogram (EEG)
measure brain activity through electrodes placed on the scalp
computed tomography (CT)
Taking X-ray in 360 degree to yield 3D image.
Good for static structure
Magnetic resonance imaging (MRI)
strong magnetic field to image structures within body. MRI is better at imaging soft tissue and does not involve ionizing radiation.
Positron emission tomography (PET)
radiolabeling glucose as fludeoxyglucose (FDG), which emits positrons as it decays.
More decay = more glucose being metabolized = more intense neural activity
PET can help visualize both bran structure and activity.
functional MRI (fMRI)
- based on difference in magnetic properties btw oxygenated and deoxygenated hemoglobin in venous blood to visualize blood flow.
- image brain structure and measure brain activity
What is “Reliability” of a test?
Reliability = consistently produce the same results over time
What is “Validity” of a test?
Validity = the test measures what is intended to be measured