Week 3
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ACh
• Excitatory • voluntary motor control – deficiencies linked to AD
Glutamate
Primary excitatory neurotransmitter
Dopamine
• Can be excitatory OR inhibitory depending on the receptors • Pleasure, motivation
GABA
Primary inhibitory neurotransmitter
NE
• Can be excitatory OR inhibitory depending on the receptors present • Modulates awareness of outside world, esp threats
Serotonin
• Inhibitory • Happiness
Split-brain procedure
• Severing of corpus callosum • scientists know that 2 hemispheres can work together seamlessly, but only when connected
Results of split-brain experiment w two images
• Different image presented to each visual field simultaneously (e.g. an X to the right, an O to the left) • Note: visual pathways cross in the brain (part of L visual field goes to R visual cortex and vice versa) • Speech is localized in the left brain (Broca’s area and Wernicke’s area) –> if verbally asked what they’d see, they’ll only verbally respond w what they see on the RIGHT side;