1Unit 3-B (B): Older Brain Structures Mr. McCormickA.P. Psychology
2Do-Now (Discussion)What type of information can be gained through the following neurological measurement tools?E.E.G. (Electroencephalogram)C.T. (Computed Tomography) ScanP.E.T. (Positron Emission Tomography) ScanM.R.I. (Magnetic Resonance Imaging)f.M.R.I. (Functional M.R.I.)
3The Brain Brain-to-Body Weight Ratios of Living Organisms: Dinosaurs: Elephants:1/600thMice:1/40thMarmosets:1/25th
4Other than size, what else determines a species’ intelligence? The BrainOther than size, what else determines a species’ intelligence?
5Older Brain Structures: The Brainstem The complexities of brain structures serve as indicators of a species’ intellectual capacitiesBrainstem:Oldest part and central core of the brainBeginning where the spinal cord swells as it enters the skullFunction:Automatic survival functions
6Older Brain Structures: The Brainstem Medulla:Base of the brainstemFunctions:Controls heartbeatControls breathingPons:Located above the medullaFunction:Coordinates movementReticular Formation:A nerve network in the brainstemControlling arousal
7Older Brain Structures: The Brainstem What types of automatic survival functions are controlled by the brainstem?How do the medulla and reticular formation interact with the autonomic nervous system?How do the pons interact with the somatic nervous system?
8Older Brain Structures: The Brainstem and Thalamus
9Older Brain Structures: The Thalamus & Cerebellum Brain’s sensory switchboardLocated on top of the brainstemFunctions:Directs messages to the sensory receiving areas in the cortexTransmits replies to the cerebellum and medullaCerebellum:“Little Brain”Located at rear of brainstemProcessing sensory inputCoordinating movement output and balance
10Older Brain Structures: The Thalamus & Cerebellum With which types of neurons does the thalamus interact?With which types of neurons does the cerebellum interact?
14Older Brain Structures: The Limbic System Hippocampus:Function:Processes MemoryAmygdala:Two lima bean-sized neural clustersLinked to EmotionHypothalamus:Located below the thalamusFunctions:Maintenance activities: eating, drinking, body temperatureHelps govern endocrine system (via pituitary gland)Linked to emotion and reward
15Older Brain Structures: The Limbic System Imagine that you encounter an angry cat. Its back is arched, fur is fluffed, and pupils are dilated.Which division of the autonomic nervous system is activated by this stimulation of its amygdala (neural center of emotion)?