PSY 263 EXAM 2 - QUESTIONS AND ANSWERS

PSY 263 EXAM 2

Golgi Stains

- shows a small percentage of neurons in their entirety


Nissl stains

- shows cell bodies of all neurons (good for gray matter structure)


Myelin stains

- Shows myelin on axons (good for white matter structures)


4 electrical brain recording techniques

- EEG, ECG (EKG), EMG, GSR


EEG records:

- brain waves (electrical activity in the brain)


ECG/EKG (electrocardiogram) records:

- heart activity


EMG records:

- muscle activity


GSR records:

- skin conductance (sweating)


Voltammetry

, - Make chemical measurements in brain


Electrophysiology

- record action potentials in brain


Functional MRI (fMRI)

- examines blood flow/oxygen to the brain area
- gets more than just brain structure


Parkinson's disease

- movement disorder
- tremors, rigidity and slow movement
- loss of neurons in substantia nigra (black substance) in brain


Broca's aphasia

- telegraphic speech
- ex: dog hid table ate bone - lacks the grammar articles
- damage to the left frontal lobe of the cortex


Lesions:

- damage brain, assess behavior, brain function
- toxin produces animal model of Parkinson's disease
- pimple = skin lesion

Voltammetry

- make chemical measure in brain


Electrophysiology

- record action potentials in brain