This Powerpoint contains initial information concerning the CNS and the brain.

1. Its all in your head!.... Well mostly.

2.  Bigger brains are smarter brains
 You only use about 10% of your brain Brain Myths
 Sleep aids memory formation
 You can grow new brain cells
Hit or shit?
 Bad diets can cause brain damage
 Thinking bad things can make you sick
 You can be brain dead but remain alive
 The brain is the most complex structure in the known universe
 There is a you part of the brain – a bit that controls the rest
 The brain is partly made of fat
 No two nerve cells in your brain actually touch
 Your brain uses electricity to think
 Depression is a physiological disease

3.  Bigger brains are smarter brains (only between species, sorry big heads don’t mean
your smart!)
 You only use about 10% of your brain
 Sleep aids memory formation
 You can grow new brain cells
 Bad diets can cause brain damage
 Thinking bad things can make you sick
 You can be brain dead but remain alive
 The brain is the most complex structure in the known universe
 There is a you part of the brain – a bit that controls the rest
 The brain is partly made of fat
 No two nerve cells in your brain actually touch
 Your brain uses electricity to think
 Depression is a physiological disease

4. Get a feel for the brain….
 Adult brain weighs about 1.5kg
 It has the consistency of cooked oatmeal
 If spread out flat it would cover about 6 pages of the
age newspaper
 You are born with all of the nerve cells you will ever
have, about 100 billion
 Your brain grows connections between nerve cells,
making your brain more dense
 Every single brain cell can form connections with
around 10,000 other nerve cells

5. Humans – the best brain!

6. More Highly Evolved?

7. The Human Brain
 The brain is the control center for all human behaviour,
without understanding our brains and nervous systems we
can never fully understand behaviour.
 Some scientists argue that all human behaviour can be
traced to biological functioning.
 Our Brains are our most important organ, they make us
who we are.
 The bigger an organisms cortex the more intelligent it
seems to be – this is NOT true within species
 Whether or not the brain is the sole seat of consciousness it
is most certainly part of the puzzle……
 Learning and Memory involve physical changes in your
brain!

9. Does your brain look like this?

10. The hemispheres of the Cerebral Cortex
The corpus
Callosum

11. The hemispheres of the Cerebral Cortex
 The cortex is made up of two separate but linked
hemispheres (halves)
 Each hemisphere (left or right) is responsible for
movement and sensation in the opposite side of the
body.
 Each hemisphere is also involved in specific functions
i.e. the left side controls our ability to use and
understand language
 The two hemispheres are linked by a bundle of nerves
(neurons) called the Corpus Callosum

12. The Cross over….
 Left controls Right
 Right controls Left
 No one knows why so don’t
ask!
 This diagram is from the
back
 Note sexy yellow budgie
smugglers

13. The Lobes of the cortex

14. The Lobes of the cortex
 Each hemisphere of the cortex can be divided further into 4
lobes (Frontal, Parietal, Occipital, Temporal) FPOT
 These lobes are also responsible for specific behaviours, i.e. the
frontal lobes control emotional behaviour, planning etc.
 These Lobes also receive and processes information from a
particular sense.
 Occipital lobes = visual information,
 Temporal lobes= Auditory (sound)
 Parietal lobes= somatosensory (body and skin)
 Frontal lobes. This lobe is involved in initiating movement of
the body, They are the only lobes that do not process info from a
specific sense are the

15. The Lobes of the cortex
 These lobes cover both the left and right
hemispheres – Note that hemispheric specialization
still stands (eg. Left hemisphere predominately
involved in language)
 Left frontallobe – speech production – motor
movement in frontal lobe
 Left temporallobe – speech comprehension –
auditory info in temporal

16.  Read / skim through pages 177 – 182 and complete the
following in your workbooks:
 L.A 4.1 => Questions 2,3,4,5 & 6
 L.A 4.2 => Questions 1, 2 & 3

17. The Four Lobes of the Cerebral
Cortex
 Read from 182 – 198 and complete the following:
 L.A 4.3 – Complete in pencil in your textbook
 L.A 4.6 – Complete in pencil in your textbook
 L.A 4.7 – All questions (Question 2 – a rough sketch
will do)