Cerebrum

Amazing
Facts About
ME!

When Cerebrum
Talks.....

Suria Shahid

The meninges are the
protective layer on
the outside of the
brain; consists of
dura, arachnoid &
pia mater.

1

Dura mater: 2 parts:
periosteal &
meningeal.

2

Arachnoid: a web-
like middle layer.

3

Pia: delicate inner
layer that attach to
the brain surface.

4

Space below dura
mater: subdural space.
Space below arachnoid
mater: subarachnoid
space : contains fluid
called CSF

5

This is ME,
Cerebrum! I am the
largest part of the
brain.

6

Due to the outer
layer tissue of mine
growing more
rapidly during
development, that is
why there is gyri;
folds on the surface.

7

Look at the sulci
between the gyri.
Don't they look like
small rivers in
Kashmir?

8

I consist of 2
hemispheres which
are left and right.

9

Right and left
hemisphere
separated by
longitudinal
fissure.

10

The earth has 7
continents, while I
have 5 lobes
There are frontal,
parietal, temporal,
occipital and
insula.

11

FRONTAL

I control voluntary
movement, and

manage higher level
executive functions.

Executive functions: think, learn,
plan, organise, personality.

12

PARIETAL

I perceive sensory
information from the

skin; it makes you
feel pain, hot, cold,
itchy, touch and so

on...

13

TEMPORAL

I perceive and
integrate sounds. I
make you hear the
music and save the

memory for you.

14

OCCIPITAL

I give and integrate
your visual
perception.

15

INSULA

I perceive taste,
perceive sensation

that come from
internal organs and

control smooth
muscles.

16

Some gyri are more
popular than others
i.e. pre-central and
post-central gyrus.
They are located
near central sulcus.

17

The pre-central
gyrus serves to
initiate the
contraction of
skeletal muscles
throughout the body.

18

A motor homunculus
represents a map of
pre-central gyrus
dedicated to motor

processing for
different anatomical
divisions of the body.

19

The post-central
gyrus is the main
sensory receptive
area for the sense of
touch.

20

A sensory homunculus
represents a map of
post-central gyrus
dedicated to
sensation for

different part of skin
throughout the body.

21

The inner tissue of ME
called white matter;
consists of thousands
of tracts that can be
categorized into 3
types; association,
commisural and
projection tract.

22

Association tract:
sending impulse from
one gyrus to another

gyrus

23

Commisural tract:
sending impulse from

one gyri of a
hemisphere to the
corresponding gyri

on the other.

24

Projection tract:
Sending impulses from
the cerebrum to other
parts of the brain or

vice versa.

25

Thanks for
reading.......