Sponge Set up Cornell Notes on pg 17

Sponge: Set up Cornell Notes on pg. 17 Topic: 11. 1 Meninges Essential Question: What is the MAJOR function of the meninges? 11. 1 2. 1 Atoms, Ions, and Molecules Meninges What is the MAJOR function of the meninges?

The Central Nervous System Brain – • Lies in the cranial cavity • Includes 100 billion multipolar neurons Brain stem • Connects brain and spinal cord • Allows a 2 -way communication between brain/spinal cord Spinal cord • Lies in the vertebral canal within the vertebral column • Provides a 2 -way communication between the CNS and PNS

The Curious Case of Phineas Gage

Intro to Ch. 11 Divisions of the N. S. • Please read and HIGHLIGHT the opening article of the chapter • Read the timeline of Karen Ann Quinlan • Answer the questions 4

The Curious Case of Phineas Gage 2 m 7 s-4 m 57 s https: //www. youtube. com/watch? v=v. Hrmiy 4 W 9 C 0

Intro to Ch. 11 Divisions of the N. S. • Discuss your answers with your table • Be prepared to be called on to share your answers. 6

Meninges are the membranes surrounding CNS • Protect the brain and spinal cord • Found between the bone and soft tissue of the nervous system There are three layers: Brain 7

Label your picture as we go through the notes Brain 8

1. Dura mater – “tough mother” • • Outermost layer- double layered Tough connective tissue Surrounds the entire brain and spinal cord Attaches to the inside of the cranial cavity- anchoring the brain skull to limit movement • Forms the internal covering of the skull bones • Continues into the vertebral canal as a strong tubular covering that surrounds the spinal cord • Contains many blood vessels and nerves • Supports and protects the lobes of the brain and spinal cord 9

2. Arachnoid mater– “in the image of spider” • • • Thin middle layer Made up of loose connective tissue Has weblike extensions Lacks blood vessels Spreads over the brain and spinal cord • Subarachnoid space lies between arachnoid and pia mater which contains the clear watery cerebrospinal fluid or CSF “think web”= arachnoid 10

3. Pia mater– “gentle mother” • • Very thin innermost layer Many nerves and blood vessels Clings to the brain’s surface Nourish the underlying cells of the brain and spinal cord “think web”= arachnoid 11

Figure 11. 01 a

Meninges of the Spinal Cord Subarachnoid space 13

The Protective Layers of the Brain 2 m 6 s 14

Disorders Associated with the Meninges: Meningitis: is an inflammation of the meninges • Caused by Bacteria OR viruses that invade the cerebrospinal fluid • Commonly limited to the arachnoid and pia maters • Most often in infants and children • Complications: loss of vision, loss of hearing, paralysis and mental retardation. May be FATAL 15

The Signs and Symptoms of Meningitis 3 m 31 https: //www. youtube. com/watch? v=FHLWnlrm. KNg 16

P. 16 Types of Meningitis Bacterial Viral • • Fungal Encephalitis (bite) How do you get it? Symptoms Who is at most risk (age)? Treatment/medicine? Use computers to research • 15 minutes • Web. MD/ Mayo. Clinic/ Medicine. Plus / CDC 17

P. 16 Types of Meningitis Bacterial Viral • • Fungal Encephalitis (bite) How do you get it? Symptoms Who is at most risk (age)? Treatment/medicine? GET OUT HOMEWORK FOR SIGNATURE 18

Meningitis Video Notes Please add at least 3 bullets per video to your tree-map on p. 16 • • How do you get it? Symptoms Who is at most risk (age)? Treatment/medicine? 19

Meningitis Video Notes Bacterial Meningitis 5 m https: //www. youtube. com/ watch? v=tu. Y 91 Pe. Tdl. A Viral Meningitis 4 m https: //www. youtube. c om/watch? v=QWW 0 p qrv 7 rk 20

Meningitis Video Notes Fungal Meningitis (Valley Fever) 2 m 28 s Managing Meningitis 2 m 21 s 21

Subdural hematoma: when a blow to the head ruptures blood vessels associated with the brain • Escaping blood collects between the dura mater and arachnoid mater • Increases pressure between the bones of the skull and the soft tissues of the brain • Will lead to functional losses or even DEATH if not drained 22

Subdural hematoma 1 m 9 s https: //www. youtube. com/watch? v=m 45 AYu 1 NT_423

Craniotomy/Craniectomy 5 m 48 s https: //www. youtube. com/watch? v=Ka. Z 9 Edhx. Rmc 24