the brain. brain rap eeg electrodes on the brain that record brain waves especially useful in sleep...
TRANSCRIPT
CT Scan
shows structure of the brain
Especially useful in determining abnormalities such as tumors, decay, etc
PET Scan
use dye to show brain activity
Used most often in research and the study of cancer, epilepsy, Parkinson's, etc
MRIshows tissue responses to pulses of magnetic energy*used to diagnose abnormalities in brain tissue (tumors, decay, etc)
Major Parts of the Brain Stem• Medulla- controls automatic functions• Pons- regulates sleep and dreams• Reticular Formation- core of BS; monitors
incoming sensory info and attention and serves as Emergency Warning System
• Thalamus- receives info and prioritizes and distributes it accordingly
• Cerebellum- handles coordination and balance
Major Elements of the Limbic SystemExists in all mammals- involved in memory, emotion and
caring for young• Hippocampus- establishes LTM• Amygdala- controls emotion; holds emotionally
charged LTM; center of fear and aggression (Waterboy got this wrong- don’t confuse with medulla!)
• Hypothalamus- body’s blood lab- monitors heart-rate, body temp, etc- important in _____ division of the PNS
Lobes of the Cerebral Cortex1. Frontal- movement,
thinking1. Motor cortex
2. Parietal- touch, spatial relationships
1. Somatosensory cortex
3. Occipital- vision1. Visual cortex
4. Temporal- hearing, speech, some LTM1. Auditory cortex
Motor and Somatosensory Cortex• Homunculus:
represents the amount of space on the M and S cortexes dedicated for each location on the body.– Which part of the
human body has most representation on these cortexes? 2nd most? Least?
Association Cortex• Majority of cerebral cortex is used to associate
information from all cortical regions.– It will combine information from all over the brain,
interpret the sensations, plan, decide and prepare us to act.
21
LanguageAphasia is an impairment of language,
usually caused by left hemisphere damage either to Broca’s area (impaired speaking)
or to Wernicke’s area (impaired understanding).
Left Brain Right Brain
• Regulates + emotion• Speech muscles• Movement sequence• Spontaneous
speaking/writing• Word and # memory• Understanding what you
hear or read
• Regulates – emotion• Response to simple
command• Shape and music
memory• Understanding spatial
relationships and visual images
• Recognition of faces