THE NERVOUS SYSTEMIts all in your head!.... Well mostly.

Brain Myths Hit or shit?

Bigger brains are smarter brains

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

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

Get a feel for the brain….Adult brain weighs about 1.5kgIt has the consistency of cooked oatmealIf spread out flat it would cover about 6

pages of the age newspaperYou are born with all of the nerve cells you

will ever have, about 100 billionYour brain grows connections between nerve

cells, making your brain more denseEvery single brain cell can form connections

with around 10,000 other nerve cells

Humans – the best brain!

More Highly Evolved?

The Human BrainThe 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!

YOUR BRAIN WILL BE PHYSICALLY DIFFERENT

WHEN YOU LEAVE THIS CLASS TODAY!

Does your brain look like this?

The hemispheres of the Cerebral Cortex

The corpus Callosum

The hemispheres of the Cerebral CortexThe 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

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

The Lobes of the cortex

The Lobes of the cortexEach 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

The Lobes of the cortexThese lobes cover both the left and right

hemispheres – Note that hemispheric specialization still stands (eg. Left hemisphere predominately involved in language)

Left frontal lobe – speech production – motor movement in frontal lobe

Left temporal lobe – speech comprehension – auditory info in temporal

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

The Four Lobes of the Cerebral CortexRead 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)