Sponge: Set up Cornell Notes on pg. 17 Topic: 11 Sponge: Set up Cornell Notes on pg. 17 Topic: 11.1 Meninges Essential Question: What is the MAJOR function of the meninges? 11.1 Meninges 2.1 Atoms, Ions, and Molecules 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
The Curious Case of Phineas Gage 2m7s-4m57s https://www.youtube.com/watch?v=vHrmiy4W9C0
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.
Brain 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
Label your picture as we go through the notes Brain
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
“think web”= arachnoid 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
“think web”= arachnoid 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
Figure 11.01a
Meninges of the Spinal Cord Subarachnoid space
The Protective Layers of the Brain 2m6s
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
The Signs and Symptoms of Meningitis 3m31 https://www.youtube.com/watch?v=FHLWnlrmKNg
Use computers to research 15 minutes 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 WebMD/ MayoClinic/ MedicinePlus / CDC
GET OUT HOMEWORK FOR SIGNATURE 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
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?
Meningitis Video Notes Viral Meningitis 4m https://www.youtube.com/watch?v=QWW0pqrv7rk Bacterial Meningitis 5 m https://www.youtube.com/watch?v=tuY91PeTdlA
Meningitis Video Notes Fungal Meningitis (Valley Fever) 2m28s Managing Meningitis 2m21s
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
Subdural hematoma 1m9s https://www.youtube.com/watch?v=m45AYu1NT_4
Craniotomy/Craniectomy 5m48s https://www.youtube.com/watch?v=KaZ9EdhxRmc