Transcript The External Brain

The External Brain
Unit 2: Bio Basis of Behavior
Lesson 3
Objectives:
Distinguish between characteristics of the
left and right hemispheres of the brain.
Identify the location and function of the
four lobes of the brain.
Locate the specialized association areas
of the cerebral cortex.
Warm Up
 What are the two
primary types of brain
cells?
Neurons - messengers
Glial - support
Review
 Which part of the N.S.
Is made up of glial cells
and neurons?
Is made up of nerves?
Send messages to brain?
Sends messages to
body?
Controls voluntary
movements?
Involuntary movements?
Prepares for action?
Recovers from stress?
Cerebral Cortex & Cerebrum
 Wrinkled covering
Gyri- bumps
Sulci- grooves, fissures
 Hemispheres
2 halves of brain (L-R)
 Corpus Callosum
Wide band of nerve
fibers connecting
hemispheres
Write down which of the pair best
describes you…
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Names
Organized
Realistic
Logic
Well-structured
Language
Not Creative
Detail Oriented
Systematic Plans
Vegetables
Micromanage
Reserved
Faces
Spontaneous
Fantasy
Intuition
Open-ended
Pictures
Creative
Main Idea
Exploration
Fruits
Delegate
Emotional
 All left hand options =
left brain behaviors /
preferences
 All right hand options =
right brain behaviors /
preferences
Lateralization
 Roger Sperry (1960s)
 (False) Idea each
hemisphere is
responsible for
different mode of
thinking…we prefer
one over another.
Left Brain/Right Brain/Whole Brain Test
Neurosurgery
 Corpus Callosotomy
Roger Sperry & Michael
Gazzaniga
“Split brain” surgery
Sever C2 , reducing
communication
between 2 hemispheres
 Chimeric Figures
Neurosurgery
 Hemispherectomy
Removal or disabling of
entire cerebral
hemisphere
 Plasticity
Ability of brain to
compensate for
damage/loss
Frontal Lobe
 Front of cerebral
cortex (blue)
 “Executive Director”
 Reasoning, planning,
coordination, problem
solving, working
memory
 Emotion, socialization,
personality, sexuality
 Motor Cortex - Motor
movement
Parietal Lobe
 Behind central
fissure (green)
 Sensation and
perception
Touch, temp,
pain, location of
limbs
Number relations
Object
Manipulation
Occipital Lobe
 In rear portion of
cortex (yellow)
 Visual processing
center
Temporal Lobe
 On sides of
cortex (pink)
 Auditory
Processing
 Memory
formation,
language
comprehension,
taste & smell
Association Areas
Involved in higher mental functions.
Interpret, integrate, act on incoming info.
Closure
Which side of the brain…
dominates in left-handed pitcher?
dominates in right-handed batter?
Better able to use info that is heard?
Better able to use info that is seen?
Shows a wide range of emotion?
Better at tasks involving creativity?
Better at tasks involving application?