Spinal cord

for more presentations
http://medicalpresentation.blogspot.in/

1. Spinal Spinal
cordcord

2. ANATOMY OF SPINAL CORDANATOMY OF SPINAL CORD
Continuation of medullaContinuation of medulla
Within the vertebral canalWithin the vertebral canal
Upper border of atlas to lower border Upper border of atlas to lower border
of L1of L1
CONUS MEDULLARISCONUS MEDULLARIS

4. MENINGEAL LAYERS AROUND THE MENINGEAL LAYERS AROUND THE
SPINAL CORDSPINAL CORD
►Duramater …S2Duramater …S2
►Arachnoidmater …S2Arachnoidmater …S2
►Piamater …L1Piamater …L1
FILUM TERMINALEFILUM TERMINALE
Linea splendensLinea splendens
Ligamenta denticulataLigamenta denticulata

6. TRANSVERSE SECTION OF SPINAL CORDTRANSVERSE SECTION OF SPINAL CORD

7. SPINAL NERVES & SPINAL SEGMENTSSPINAL NERVES & SPINAL SEGMENTS
►Gives off 31 pairs of nervesGives off 31 pairs of nerves
►C8 T12 L5 S5 Co1C8 T12 L5 S5 Co1
►Cervical & lumbar enlargementsCervical & lumbar enlargements
►CAUDA EQUINACAUDA EQUINA

8. ►Does not correspond to the vertebral Does not correspond to the vertebral
levellevel
►Cervical….1 segmentCervical….1 segment
►Upper thoracic….2 segUpper thoracic….2 seg
►Lower thoracic….3 segLower thoracic….3 seg
►Lumbar ….T11 &T12Lumbar ….T11 &T12
►Sacral & Coccygeal….L1Sacral & Coccygeal….L1

10. INTERNAL STRUCTUREINTERNAL STRUCTURE
Grey matterGrey matter
Ventral horn cellsVentral horn cells
1.medial group 1.medial group
2.lateral group2.lateral group
3.central3.central

11. Dorsal horn cellsDorsal horn cells
1.Substantia gelatinosa of Rolando1.Substantia gelatinosa of Rolando
2.nucleus proprius2.nucleus proprius
3.Clarke’s column3.Clarke’s column
4.Marginal zone4.Marginal zone

12. ►Intermediate zone Intermediate zone
1.Intermediolateral1.Intermediolateral
2.Intermediomedial2.Intermediomedial

14. REXED’S LAMINAREXED’S LAMINA
►10 LAMINA10 LAMINA
II Marginal zoneMarginal zone
IIII SGRSGR
III, IVIII, IVNucleus propriusNucleus proprius
VV Neck of dorsal grey Neck of dorsal grey
columncolumn
VIVI Base of dgcBase of dgc

15. VIIVII Intermed grey matterIntermed grey matter
VIII, IXVIII, IX Ventral hornVentral horn
XX Around central canalAround central canal

17. …….INTERNAL STRUCTURE.INTERNAL STRUCTURE
WHITE MATTERWHITE MATTER
Ascending tractsAscending tracts
1.Dorsal column tract-FG & FC1.Dorsal column tract-FG & FC
2.Spinothalamic tract-ANT & LAT2.Spinothalamic tract-ANT & LAT
3.Spinocerebellar tract-ANT & POST3.Spinocerebellar tract-ANT & POST
4.Spinotectal tract4.Spinotectal tract
5.Spino olivary5.Spino olivary

18. Descending tractsDescending tracts
1.Corticospinal tract-ANT & LAT1.Corticospinal tract-ANT & LAT
2.Vestibulospinal tract2.Vestibulospinal tract
3.Reticulospinal3.Reticulospinal
4.Rubrospinal tract4.Rubrospinal tract
5.Tectospinal tract5.Tectospinal tract
6.Olivospinal tract6.Olivospinal tract

20. Blood supplyBlood supply
►Anterior spinalAnterior spinal
►2 Posterior spinal arteries2 Posterior spinal arteries
►Arteria vasa coronaArteria vasa corona

21. ►Main source of blood is the Vertebral Main source of blood is the Vertebral
arteries……cervical arteries……cervical
►Radicular arteries…….spinal br. of Radicular arteries…….spinal br. of
vertebral, asc cervical, deep cervical, vertebral, asc cervical, deep cervical,
intercostal, lumbar and sacral artintercostal, lumbar and sacral art
►Arteria radicularis magnaArteria radicularis magna

22. DISTRIBUTION OF BLOOD SUPPLYDISTRIBUTION OF BLOOD SUPPLY
►Radicular art : grey & white matterRadicular art : grey & white matter
►Anterior spinal : ant two-third Anterior spinal : ant two-third
ventral grey matter,part of dorsal grey ventral grey matter,part of dorsal grey
matter,ant and lat funiculimatter,ant and lat funiculi
►Posterior spinal : post one-thirdPosterior spinal : post one-third
posterior horn and posterior funiculusposterior horn and posterior funiculus

24. VENOUS DRAINAGEVENOUS DRAINAGE
1.Antmed 2.Antlat 3.Postmed 4.Postlat1.Antmed 2.Antlat 3.Postmed 4.Postlat

Venous vasa coronaVenous vasa corona

Radicular veinsRadicular veins
Epidural plexusEpidural plexus
inter vertebral veinsinter vertebral veins
Regional veinsRegional veins

25. ………….thank you.thank you