1. Get out work from yesterday
Sponge: Set up Cornell Notes on pg. 19 Topic: 11.2: Ventricles+ CSF Essential Question: What is the major function of CSF Text:
11.2:Ventricles + CSF
2.1 Atoms, Ions, and Molecules
EQ: What is the major function of CSF
Get out work from yesterday

2. Objective
SWU: the function of cerebral spinal fluid (CSF) SW: research traumatic brain injuries and concussions

3. Ventricles: are interconnected cavities filled with cerebrospinal fluid
Located within the cerebral hemispheres and brainstem

4. First lateral ventricle- left hemisphere
Second lateral ventricle- right hemisphere
Third ventricle- midline of the brain
Fourth ventricle- in the brainstem
Cerebral aqueduct- lead to subarachnoid space in the meninges

5. Cerebrospinal fluid (CSF):
Clear liquid secreted by choroid plexus
Circulates in ventricles, central canal of spinal cord, and subarachnoid space
Completely surrounds brain and spinal cord
Provides nutrition
Sodium, glucose, potassium
Provides a pathway to blood for waste
Maintain homeostasis
Stable ion concentrations in CNS
Protects the brain and spinal cord by absorbing forces that might otherwise jar and damage their delicate tissues

6. Humans secrete nearly 500 milliliters of cerebrospinal fluid daily:
However only about 140 milliliters are in the CNS at any time because it is continuously reabsorbed into the blood
CSF is reabsorbed through the arachnoid granulations

7. P. 18 Color code your picture: CSF pathway Blood
P. 389 in book
Color code your picture:
CSF pathway
Blood
* If needed, clearly define arrows

8. Spinal tap: Measures CSF pressure
A needle is inserted into the subarachnoid space in the lumbar vertebrae
Samples of CSF maybe withdrawn and tested for abnormal results
A temporary drain, called a shunt, may be inserted to relieve pressure

9. Lumbar Puncture Tutorial (Spinal Tap) 4m49s

10. Traumatic Brain Injuries
Impact from car crash
Shaken Baby Syndrome

11. Use the computers to QUICKLY RESEARCH TBI’s ---10 minutes
TBI Notes
p. 18
Mild TBI: Concussion
Moderate/Severe TBI
Use the computers to QUICKLY RESEARCH TBI’s minutes
Examples/Causes
Symptoms
Common Treatments

12. Traumatic Brain Injury
Traumatic brain injury (TBI): occurs when a sudden trauma causes damage to the brain.
Head suddenly and violently hits an object
An object pierces the skull and enters brain tissue 
Symptoms: can be mild, moderate, or severe depending on damage.
A person with a TBI may remain conscious or may experience a loss of consciousness for a few seconds, minutes, hours or longer

13. TBI: Video 3m55s (full video 14m28s)

14. Mild TBI: Concussion Videos
Impact of a concussion
4m38
Concussion-Helmets
1m16s

15. 1. Clinical Application 11.1 CSF Pressure
Classwork /Homework
1. Clinical Application 11.1 CSF Pressure
Read/ answer and highlight
2. Traumatic Brain Injury Reading
Read/ answer and highlight

16. Clinical Application 11.1
What are three things that can increase CSF pressure within the ventricles?
An infection
A tumor
A blood clot
2. Summarize the steps (4) of how a spinal tap is performed.
A doctor inserts a hollow needle into the subarachnoid space
A manometer measures the pressure of the CSF fluid
CSF tested for abnormal constituents (ex: red blood cells can indicate a hemorrhage in the CNS)
A temporary drains is inserted to relieve pressure
3. What is the purpose of a shunt?
Drains fluid away from the cranial cavity and into the digestive tract where it can be reabsorbed into the blood
4. Why would an infant need a shunt?
The cranial sutures have not yet united- increasing pressure (ICP) may enlarge cranium -“Water on the brain”