A&P 1 md 7 slides .pdf - Module 07 Central Nervous System...

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Module 07CentralNervous SystemAnatomy & Physiology I
Central Nervous SystemMeningesCerebrumBrainstemCerebellumSpinal cord
OverviewAnatomy & Physiology I
Objectives10/3/20214Define the role of the central nervous system (CNS)Identify the anatomical structures of the CNS
CNS: OverviewCNS is composed of the brainand spinal cordFunction of neural integrationBrain consists of specificregions:CerebrumCerebellumBrain stemProtected by the cranialbones, vertebrae andmeninges10/3/20215
CNS:Overview10/3/20216
MeningesAnatomy and Physiology I
Objectives10/3/20218Identify and describe the functions to the layers ofthe meninges
Meninges: OverviewConnective tissue layer that surrounds the brain andspinal cordFunctions include:Cover and protect CNSContain cerebrospinal fluid (CSF)Form partitions within brain/skullComposed of three layers(superficial-deep)Dura materArachnoid materPia mater10/3/20219
Meninges: OverviewNote spaces betweenthe three layersSubarachnoid spaceSubdural space10/3/202110
Meninges: Dura MaterSuperficial and strongest layerTechnically two layersPeriosteal layer-attaches to cranial bonesMeningeal layer- external covering of brain/spinal cordTwo layers are fused togetherExcept at dural venous sinusesMeningeal layer will extend inward and formpartitions within the cranial cavityCalled Dural SeptaLimit movement of brain10/3/202111
Meninges: Anatomy10/3/202112
Meninges: Arachnoid MaterMiddle layer between Dura and Pia MaterForms the subdural space and subarachnoid spaceSubarachnoid space is filled with CSFKnoblike projections of arachnoid mater extend intothe dura and dural venous sinusCalled Arachnoid villusAbsorb CSF into the venous blood return10/3/202113
Meninges: Anatomy10/3/202114
Meninges: Pia MaterThin, delicate connective tissue layer that tightlyadheres to the brain and spinal cordForms subarachnoid space with arachnoid materwhere CSF is located10/3/202115
Meninges: Anatomy10/3/202116
Meninges: Anatomy10/3/202117
Meninges:Epidural & Lumbar TapEpidural is common medical procedure that ejectsmedication in the epidural spaceSuperficial to the duraMedication diffuses through the meningesTypically performed in the cauda equina region of thespinal cordLumbar tap is a medical procedure that extracts CSFfrom the subarachnoid space10/3/202118
19Meninges: Procedures10/3/2021
CerebrumAnatomy and Physiology I

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Cerebrospinal fluid

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