Unit 3b Flashcards
Lesion
Tissue destruction, naturally or experimentally
Electroencephalogram (EEG)
Amplified recording of the electrical wave activity across the brain, measured by electrodes placed on the scalp.
CT (computed tomography) scan
Using x Ray photographs to reveal brain damage
PET (positron emission tomography) scan
Visual display of brain activity that detects where a radioactive form of glucose goes while the brain performs a given task. Active neurons use up the glucose
MRI (magnetic resonance imaging)
Use magnetic fields and radio waves to produce computer generated images of soft tissue, show brain anatomy. Can be used for other body parts
fMRI (functional MRI)
Technique revealing blood flow and therefore brain activity by comparing successive brain scans, show brain function
Brain stem
Oldest and central core of brain
Responsible for automatic survival functions
What are the parts of the brain stem
Medulla and pons
Medulla
Slight swelling, base of brain stem
Controls heartbeat and breathing
Pons
Help coordinate movement
Reticular formation
Finger shaped nerve network that plays an important part in controlling arousal, also filters incoming stimuli
Thalamus
Brain sensory switch board, receives info from all senses except smell and routes it to higher brain regions (cortex), receives their replies and directs them to medulla and cerebellum
Cerebellum
Little brain, processes sensors input, coordinate voluntary movement and balance and supports memories of such
What helps us judge time, modulate emotion, and discriminate sounds from textures
Cerebellum
Limbic system
Donut shaped, associated with emotions and drive
Parts of limbic system
Hypothalamus, pituitary gland, amygdala, hippocampus
Amygdala
Bean neural clusters
Influence aggression and fear
Hypothalamus
Bodily maintenance; hunger thirst body temp sexual behavior
Helps govern endocrine system
Linked to emotion and reward
Hippocampus
Processes memory, it lost can’t create new memories of facts or episodes
Corpus callosum
Axon fibers connecting the two cerebral hemispheres and carrying messages between
Spinal cord
Pathway for neural fibers traveling to and from brain, controls simple reflexes
Cerebral cortex description
Intricate fabric of interconnected neural cells covering cerebral hemisphere