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Parts of the Brain
Parts of the brain an how their studied as described by Psychology: Frontiers and Applications
32
Psychology
Undergraduate 1
12/10/2011

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Term
corpus callosum
Definition
bridge of fibres passing information betweeen the two cerebral hemispheres
Term
nucleus accumbens
Definition
limbic system
motivation and reward
Term
hypothalamus
Definition
regulates basic biological needs (hunger, thirst, temperature control)
- parasympathetic nervous system goes through
Term
pituitary gland
Definition
master gland that regulates other endocrine glands
Term
midbrain
Definition
sensory, attention, states of consciousness
Term
forebrain
Definition
higher order sensory, motor and cognitive
Term
thalamus
Definition
relay centre for incoming sensory information
contains basal ganglia
Term
basal ganglia
Definition
surrounds thalamus
Parkinsons
voluntary muscle control (vs. cerebellum), movement
Term
cerebrum
Definition
sensing, thinking, learning, emotion, consciousness, and voluntary movement
Term
amygdala
Definition
limbic system (seat of emotion)
involved in emotion and aggression
can produce emotion w/o brain "knowing"
Term
hippocampus
Definition
limbic system
learning and memory (long term)
Term
cerebellum
Definition
coordinates fine muscle movement, balance
learning and memory
Term
reticular formation
Definition
- hindbrain into midbrain
- group of fibres that carries stimulation related to sleep and arousal though the brain stem
- also stereotype patterns such as walking
- attention "gatekeeper"
- ascending: alerts higher centres that messages are coming
- descending: selectively blocks some inputs from admission to higher regions in the brain
Term
medulla
Definition
regulates vital functions such as breathing and circulation
(respiration = automatic b/c of it)
Term
pons
Definition
involved in sleep ad arousal
helps control vital functions
Term
frontal lobe
Definition
primary motor cortex (contralateral)
speech (Broca's area - speech formation)
Term
parietal lobe
Definition
front is somatic sensory cortex, primary receptive field for body sensations
Term
occipital lobe
Definition
primary visual cortex
Term
temporal lobe
Definition
primary auditory cortex
Term
wernike's area
Definition
speech understanding
Term
broca's area
Definition
speech formation
Term
aphasia
Definition
when either Broca's area or Wernike's area is damaged, the partial or total loss of ability to communicate occurs
Term
lateralization
Definition
some functions are more prominent in one side of the brain than the other
Term
left hemisphere
Definition
understanding, logic, desire to explain
verbal, language
+ve emotions (damage makes you more -ve)
mathematical
Term
right hemisphere
Definition
spacial relations
melodies
-ve emotions
more spontaneity
Term
neuropsychological tests
Definition
measure verbal and non-verbal behaviours (known to be affected by brain damage)
Trail-Making Test = letter and # matching
Term
destruction and stimulation
Definition
known areas of damage are stimulated w/ electricity or chemicals
Wilder Penfield
Term
electrical recording (EEG)
Definition
records electrical activity of 1000s of neurons, some EEG patterns correspond to wakefulness and sleep
"tune into 'crowd noise' of neurons"
Term
positron emission tomography (PET scans)
Definition
measures brain activity, blood flow, metabolism, neurotransmitter activity
Term
magnetic resonance imaging (MRI)
Definition
measures response to magnetic impulse
more sensitive than CT/PET
images are several minutes apart
Term
fMRI
Definition
can form images while doing tasks
images less than 1s apart
Term
major areas of the brain
Definition
hind, mid, fore, cerebral cortex
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