The Brain.pdf

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Michigan State University
PSY 101
Professor Hambrick

The Brain •Older Brain structures: sustain basic life functions and enable memory, emotions, and basic drives ▯ The Brainstem: ▯ - The medulla is the base of the brainstem that controls involuntary functions such as heartbeat and breathing - The reticular formation filters incoming stimuli (from the spinal cord) and relays information to other areas of the brain (particularly arousal) - The Thalamus receives information from all the senses (except smell) and routes it to higher brain regions, e.g. from eyes to cortical areas for vision - The Cerebellum is (“little brain”) is attached to the rear of the brainstem. It helps coordinate voluntary movements and balance; also plays a role in learning motor skills - The Limbic System includes the hippocampus, which is involved in acquisition of memories. The limbic system also includes the amygdala, which regulates fear and aggression - And the hypothalamus, which regulates the four f’s: fighting, fleeing, feeding, and fornicatin ▯ The Cerebral Cortex •At least 2/3 of total mass •2mm deep layer •Convoluted ▯ Each brain hemisphere is divided into four lobes that are separated by prominent fissures: ▯ Occi
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