pg 17 Topic 111 Meninges Essential Question What is the MAJOR function of the meninges 21 Atoms Ions and Molecules 111 Meninges What is the MAJOR function of the meninges The Central Nervous System ID: 778408
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Sponge: Set up Cornell Notes on pg. 17Topic: 11.1 MeningesEssential Question: What is the MAJOR function of the meninges?
2.1 Atoms, Ions, and Molecules
11.1 Meninges
What is the MAJOR function of the meninges?
Slide2The Central Nervous System Brain – Lies in the cranial cavityIncludes 100 billion multipolar neuronsBrain stem- C
onnects brain and spinal cord Allows a 2-way communication between brain/spinal cordSpinal cord- Lies in the vertebral canal within the vertebral columnProvides a 2-way communication between the CNS and PNS
Slide3The Curious Case of Phineas Gage
Slide4Intro to Ch. 11Divisions of the N.S. Please read and HIGHLIGHT the opening article of the chapterRead the timeline of Karen Ann QuinlanAnswer the questions4
Slide5The Curious Case of Phineas Gage 2m7s-4m57shttps://www.youtube.com/watch?v=vHrmiy4W9C0
Slide6Intro to Ch. 11Divisions of the N.S. Discuss your answers with your tableBe prepared to be called on to share your answers. 6
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Meninges
are the membranes
surrounding CNSProtect the brain and spinal cord
Found between the bone and soft tissue of the nervous systemThere are three layers:
Brain
Slide8Label your picture as we go through the notes
8
Brain
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Dura mater
– “tough mother”Outermost layer- double layeredTough connective tissueSurrounds the entire brain and spinal cordAttaches to the inside of the cranial cavity-
anchoring the brain skull to limit movementForms the internal covering of the
skull bonesContinues into the vertebral canal as a strong tubular covering that surrounds the spinal cordContains many blood vessels and nervesSupports and protects the lobes of the brain and spinal cord
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2. Arachnoid mater–
“in the image of spider”Thin middle layerMade up of loose connective tissueHas 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
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. Pia mater– “gentle mother”Very thin innermost layerMany nerves and blood vessels Clings to the brain’s surfaceNourish the underlying cells of the brain and spinal cord
“think web”= arachnoid
Slide12Figure 11.01a
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Meninges of the Spinal Cord
Subarachnoid space
Slide14The Protective Layers of the Brain 2m6s14
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Meningitis
: is an inflammation of the meninges
Caused by Bacteria OR viruses that invade the
cerebrospinal fluid Commonly limited to the arachnoid and pia matersMost often in infants and childrenComplications: loss of vision, loss of hearing, paralysis and mental retardation. May be FATAL
Disorders Associated with the Meninges
:
Slide16The Signs and Symptoms of Meningitis 3m31https://www.youtube.com/watch?v=FHLWnlrmKNg
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Slide17P. 1617Types of Meningitis
Bacterial Viral Fungal Encephalitis (bite)
How do you get it?SymptomsWho is at most risk (age)?
Treatment/medicine?
Use computers to research15 minutesWebMD/ MayoClinic/ MedicinePlus / CDC
Slide18P. 1618Types 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
Slide19Meningitis Video NotesPlease add at least 3 bullets per video to your tree-map on p. 1619
How do you get it?SymptomsWho is at most risk (age)?
Treatment/medicine?
Slide20Meningitis Video NotesViral Meningitis4m https://www.youtube.com/watch?v=QWW0pqrv7rk
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Bacterial Meningitis
5 m
https://www.youtube.com/watch?v=tuY91PeTdlA
Slide21Meningitis Video NotesFungal Meningitis(Valley Fever) 2m28s21
Managing Meningitis
2m21s
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Subdural hematoma
: when a blow to the head ruptures blood vessels associated with the brain
Escaping
blood collects between the dura mater and arachnoid materIncreases pressure between the bones of the skull and the soft tissues of the brainWill lead to functional losses or even DEATH if not drained
Slide23Subdural hematoma 1m9shttps://www.youtube.com/watch?v=m45AYu1NT_4
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Slide24Craniotomy/Craniectomy 5m48s24
https://www.youtube.com/watch?v=KaZ9EdhxRmc