UA - PSYCH 101 - Class Notes - PY 101

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Schools > University of Alabama - Tuscaloosa > Psychology > PSYCH 101 > UA - PSYCH 101 - Class Notes - PY 101

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Brain Structure, Part 1 The Brain  Broca’s area first supporting evidence that the brain has different areas with different
functions The Brain Stem  If spinal cord is damaged, neurons can’t fire (paralysis)  Reticular formation: alertness, if damaged become tired  Brain stem: o Midbrain o Pons o Medulla Oblongata o All deal with survival instincts (breathing, heart beating) The Cerebral Cortex  The outer layer of brain tissue, forms the convoluted surface of the brain o Site of all thoughts, perceptions and complex behaviors o Each cerebral hemisphere has four lobes  Occipital: vision  Parietal: senses like touch  Temporal: hearing, memory  Frontal: thought, planning, movement  Corpus Callosum: a massive bridge of millions of axons, connects the hemispheres and
allows information to flow between them o This structure is cut in the split brain operation Neuron Structure  Gray Matter: dominated by neuron’s cell bodies  White Matter: consists mostly of axons and the fatty myelin sheaths that surround them Temporal Lobe  Regions of cerebral cortex, below parietal lobe and in front of occipital lobe o Hearing o Facial recognition o Object recognition o Learning o Understanding language o Emotional reactions Parietal Lobe  Important for sense of touch and for attention to environment o Primary somatosensory cortex o Somatosensory homunculus Occipital Lobe  Regions of the cerebral cortex at the back of the brain, which are important for vision o Primary visual cortex

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