Biopdych

Question 2

how do drugs act as inhibitory neurotransmitters.

Answer 2

• The drug makes the post synapse less likely to fire
• Inhibitor transmitters bind to post synaptic receptors and send a signal to the post synaptic cells making them less likely to fire the chemical signal to the post synaptic neuron
• SUMMATION - if the inhibitory is more powerful than exhibitory it can inhibit post synaptic neuron from firing at all - decreasing overall activity

Question 3

difference and similarity between fMRI and ERPs

Answer 3

• different procedures: electrical activity of neuron’s via electrodes (brainwaves) after events vs. changes in blood oxygenation prior brain activities - haemodynamic response
• both are neurologist techniques used to gain access to cognitive processes behind brain activity

Question 4

split brain research study (sperry)

Answer 4

• sperry 1960 - laterisarion of brain functioning
• corpus callosum split due to epilepsy
• disconnected left/ right hemisphere
• stimuli presented to LVF -> flashing
• LVF in charge of right hemisphere - unable to name verbally
• RVF could name verbally (left hemisphere)

Question 5

evaluate sperry’s research

Answer 5

• controlled - lab task isolate hemisphere functions - establish cause and effect
• small, unusual sample - epilepsy
• artificial task - flashing stimuli to one visual side (in everyday 2 visual - more complex)