Anatomy

1. NUR IZZATUL NAJWA BINTI SHARUPUDDIN
082015100036

2. ATTHE END OFTHE SEMINAR, STUDENTS
SHOULD BE ABLETO :
 List and expain the spinal meninges
 Know the epidural space and its importance

3.  Upper end – medulla
oblongata
 Lower end – first
lumbar vertebra
 45cm
 Conus medullaris (L1)
 Filum terminale
(20cm)

4.  Specialized membranes isolate spinal cord
from surroundings
 Functions :
 protect spinal cord
 carry blood supply
 continuous with cranial meninges

5. Figure 13–3
Dura mater:
outer layer
Arachnoid mater:
middle layer
Pia mater:
inner layer

6.  Tough and fibrous
membrane
 Meningeal layer only
 Contains loose
areolar tissue &
internal vertebral
venous space
 Extend up 5 to S2

7.  Arachnoid = spiderlike
 Delicate impermeable
membrane
 Thin membrane
 Lies between pia and
dura mater
 Extend up to S2

8.  Thin and vascular membrane
 Closely covers spinal cord
 Continue as filum terminale
 Undergoes modification :
 Ligamentum denticulatum
▪ 21 pairs teeth like projection
▪ Keep spinal cord in position
 Linea splendens
▪ Thickening at anteromedian sulcus

9.  Between spinal dura mater
and walls of vertebral canal
(above the dura)
 No such space in the brain
 Contains loose connective
and adipose tissue
 Anesthetic injection site

10.  Subdural space:
 between arachnoid mater and dura mater
 Subarachnoid space:
 between arachnoid mater and pia mater
 filled with cerebrospinal fluid (CSF)
 LumbarTap withdraws CSF from inferior
lumbar region (below conus medularis) for
diagnostic purposes.

13.  BD CHAURASIA 25TH EDITION
 TEXTBOOK OF HUMAN NEUROANATOMY,
INDERBIR SINGH 7TH EDITION