5.4 Meninges, blood vessels & cerebrospinal fluid
5.4 Meninges, blood vessels & cerebrospinal fluid
Section1Meningesof Spinal Cordand BrainSection2 Blood Vessels of Spianl Cord and BrainSection3CerebrospinalFluid
Section 1 Meninges of Spinal Cord and Brain Section 3 Cerebrospinal Fluid Section 2 Blood Vessels of Spianl Cord and Brain
Section1MeningesofSpinalcordandBrainDuramaterexternal layer,toughanddensefibroustissueArachnoida thin intermediate layer,lackofthebloodvessels&nervesPia materathinandtranslucentinternal layer,richesinbloodvessles
Dura mater external layer, tough and dense fibrous tissue Arachnoid a thin intermediate layer, lack of the blood vessels & nerves Pia mater a thin and translucent internal layer, riches in blood vessles Section 1 Meninges of Spinal cord and Brain
Meningesofthespinal cord1.Spinal duramater? Superiorly: continuous with cerebral dura mater at foramen magnum.Inferiorly: it become thinner at the level of the 2nd sacral vertebra andenwrap thefilumterminale and ended in the coccyx·Laterally:formstheexternalmemberanesofthespinalnerves②Spinalcord1S2Coccyx
1. Spinal dura mater • Superiorly: continuous with cerebral dura mater at foramen magnum • Inferiorly: it become thinner at the level of the 2nd sacral vertebra and enwrap the filum terminale ① and ended in the coccyx • Laterally: forms the external memberanes of the spinal nerves ② I. Meninges of the spinal cord ① ② S2 Coccyx Spinal cord
2.Arachnoid·Adelicate,transparent,avascularmembrane·continuous with cerebral arachnoid at foramen magnum·Subarachnoid space:betweenarachnoid&pia materArachnoidDuramater
• A delicate, transparent, avascular membrane • continuous with cerebral arachnoid at foramen magnum • Subarachnoid space：between arachnoid & pia mater 2. Arachnoid Arachnoid Dura mater
3.Spinal pia mater·liesonthesurfaceofspinalcord&insertedintosulcus&fissure· Inferiorly: is continous with terminal filum ①→ coccyx?Laterally: is relatively thick to form the denticulate ligament ② andanchors the spinal cord laterally tothe arachnoid & duramatersSpianlcordArachnoidDura materCoccyx
3. Spinal pia mater • lies on the surface of spinal cord & inserted into sulcus & fissure • Inferiorly: is continous with terminal filum ① → coccyx • Laterally: is relatively thick to form the denticulate ligament ② and anchors the spinal cord laterally to the arachnoid & dura maters. ② ① Coccyx Spianl cord Arachnoid Dura mater
Epiduralspace·betweentheduramater&periosteumofthevertebralcanal·containslooseareolartissue,lymphaticvessels,venousplexuses& spinal nerves ②·istheplaceforepiduralanesthesiaPosteriorSpinalcordDuraSpinousprocessol.vertebraMeningesDura.mater (dural sheath)ArachnoidmaterPiamaterFat in epidural spaceSubarachnoidspaceEpiduralspacewithanesthesiaSpinal cordOenticutlate ligamentDorsai root gangionSpinal neryEVertobral body
• between the dura mater ① & periosteum of the vertebral canal • contains loose areolar tissue, lymphatic vessels, venous plexuses & spinal nerves ② • is the place for epidural anesthesia Epidural space
Subarachnoidspacebetweenthearachnoid &piamater,containsthecerebrospinalfluid·inferiorly:isespeciallylargebetweentheLV1toSV2andformsthetermianlcistern②,whichcontainsthecaudaequine③·is the placefor lumbar puncturebecause of avoid of injuryto the spinal cordPosterioSpinousprocess ofvertobraMeningesDura.mater (dural sheath)ArachnoidmaterPia materFat in epidural spacoSubarachnoidspaceSpinal.cordDenticuiateligametDorsaf root.ganglion2Spinal netVertebrai body
Subarachnoid space • between the arachnoid ① & pia mater, contains the cerebrospinal fluid • inferiorly: is especially large between the LV1 to SV2 and forms the termianl cistern ②, which contains the cauda equine ③ • is the place for lumbar puncture because of avoid of injury to the spinal cord. L1 ② ③ L1
II.Meningesofthebrain1.Cerebralduramater·outerlayeris formed by the periosteum, internal layer is strongandcontinuous with the spinal dura mater..is loosely attached to the calvaria → epidural hematoma·iscloselycontactedwiththecranialbase→CSFleakingout硬膜外血肿脑疝
• outer layer is formed by the periosteum, internal layer is strong and continuous with the spinal dura mater. • is loosely attached to the calvaria → epidural hematoma • is closely contacted with the cranial base → CSF leaking out 1. Cerebral dura mater II. Meninges of the brain
Septaformedbytheduramater: Cerebral falx:a vertical partitioninthe longitudinalfissure,above the corpus callosum ③Cerebellar tentorium: a semilunar shelf separating the occipitallobefromcerebellum@3224
Septa formed by the dura mater: ① Cerebral falx: a vertical partition in the longitudinal fissure, above the corpus callosum ③ ② Cerebellar tentorium: a semilunar shelf separating the occipital lobe from cerebellum ④ ① ② ③ ④ ②