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Modules 5 and 6
Question | Answer |
---|---|
Lesion | Tissue destruction, A brain _____ is a naturally/experimentally caused destruction of brain tissue |
EEG | Amplified recording of waves of electrical activity that sweep across the brain's surface. These waves are measured by electrodes placed on scalp |
PET Scan | Visual display of brain activity that detects where a radioactive form of glucose goes while the brain performs a given task |
MRI | Technique that uses magnetic fields and radio waves to produce computer-generated images of soft tissue; shows brain anatomy |
fMRI | Technique for revealing bloodflow and brain activity by competing MRI scans; show how brain functions |
Brainstem | Oldest part and central core of the brain, beginning where the spinal cord swells as it enters the skull; responsible for automatic survival functions |
Reticular Formation | Nerve network in brainstem that plays important role in controlling arousal |
Medulla | Base of brainstem; controls heartbeat and breathing |
Thalamus | Brain's sensory switchboard; located on top of brainstem; directs messages to sensory receiving areas in cortex and transmits replies to the cerebellum and medulla |
Cerebellum | "Little Brain" at rear of brainstem; processes sensory input and coordinates movement output and balance |
Limbic System | Neural system located below cerebral hemispheres, associated with emotions and drive Includes hippocampus, hypothalamus, and amygdala |
Amygdala | Two lima-bean sized neural clusters in limbic system; linked to emotion |
Hypothalamus | Neural structure lying below thalamus; directs several maintenance activities; helps govern endocrine system via the pituitary gland; linked to emotion and reward |
Cerebral Cortex | Intricate fabric of interconnected neural cells covering the cerebral hemispheres; body's ultimate control and information-processing center |
Glial Cells | Cells in nervous system that protect, support, and nourish neurons |
Frontal Lobes | Portion of cerebral cortex lying just behind the forehead; involved in speaking and muscle movement and making plans and judgements |
Parietal Lobes | Portion of cerebral cortex lying at the top of the head and toward the rear; receives sensory input for touch and body position |
Temporal Lobes | Portion of cerebral cortex lying roughly above the ears; includes auditory areas, each receiving information primarily from opposite ear |
Occipital Lobes | Portion of cerebral cortex lying at back of head; includes are that receive information from visual fields |
Motor Cortex | Area at the rear of the frontal lobes that controls voluntary movements |
Sensory Cortex | Area at the front of the parietal lobes that registers and processes body touch and movement sensations |
Association Areas | Areas of the cerebral cortex that are not involved in primary motor/sensory functions; involved in higher mental functions such as learning, remembering, thinking, and speaking |
Plasticity | Brain's ability to change, especially during childhood, by reorganizing after damage or by building new pathways based on experience |
Neurogenesis | Formation of new neurons |
Corpus Callosum | Large band of neural fibers connecting the two beain hemispheres and carrying messages between them |
Split Brains | Condition resulting from surgery that isolates the brain's two hemispheres by cutting fibers (mostly corpus callosum) connecting them |