Homeroom Presentation, JDG2015

2. Central Nervous System
Or the CNS is the command center
of the nervous system; the brain,
and in vertebrates, the spinal cord.

4. Spinal Cord
Main pathway of afferent impulses to
the brain as well as the efferent
impulses from the brain. It is regarded
as the seat of reflex actions.

5. Brain
Regarded as the seat of
consciousness
and higher mental processes.
Involved in regulating and
controlling bodily activity and
interpreting information from the
senses transmitted through the
nervous system.

6. The brain is safely protected by the
skull and meninges

7. Periosteum
From the Greek word Peri (around)
and Ostoun (bone)
Is a dense layer of vascular
connective tissue enveloping the
bones except at the surfaces of the
joints.

8. Bone/Skull/Cranium
Is a collection of bones which encase
the brain and give form to head and
face. The bones of the skull include

10. Dura Mater
Latin for “Tough Mother”
Also called Pachymeninx
The tough outermost membrane
enveloping the brain and the spinal
cord

11. Arachnoid Mater
A fine, delicate membrane, the
middle one of the three meninges
that surround the brain and spinal
cord, situated between the dura
mater and the pia mater

12. Pia Mater
Latin for “Tender mother”
The delicate innermost membrane
enveloping the brain and spinal
cord
It protects the CNS by containing
CSF which cushions the brain and
spine

13. Cerebrospinal Fluid (CSF)
A watery fluid that is continuously
produced and absorbed and that
flows in the ventricles within the
brain and around the surface of the
brain and the spinal cord.

14. Aside from CSF acting as a shock
absorber to for the CNS it also
circulates nutrients and chemicals
filtered from the blood and removes
waste products from the brain.

15. If production exceeds absorption,
causing the fluid to accumulate,
CSF pressure rises and the result is
hydrocephalus which are common
in children with brain tumors.